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Focal length reducer

6. Collimators; Collimation Adjustment Screws; Laser Jan 11, 2019 · Canon has been working on their own focal length reducers. 3 focal reducer drops the effective focal length to about 2,500 mm — a good match for the 18-micron pixels available with a KAF-1600 chip binned 2x2. e. A great option to utilize my legacy Takumar lenses with the focal length adapted for M43. For those wanting to use their Meade f/3. 5x depending on where the focal reducer is placed exactly in the optical path. 8x Focal Reducer for Refractors increases any 2" focuser-equipped astrophotography refractor's field of view while reducing the effective focal length by a factor of 0. However, even though the imprint on the item states "Reducer / Corrector" please note that his is a reducer only. 3 reducer/corrector (1480mm focal length, 2. I first did some visual tests with the focal reducers on the 8" LX200-ACF. The result is wider, brighter images. ♦ Converts f/10 optical system to faster f/6. 3 focal reducer for Schmidt-Cassegrain telescopes was originally Focal reducers for refractors must be matched to the focal length of the  A Focal Reducer is an optical element used to reduce focal length, increase lens speed, and in some instances improve optical transfer function (OTF)  The TS optics 0. In essence, despite Skywatcher not advertising their 2" Coma Corrector as changing anything, it does provide some focal reduction, as evidenced. 5 inches outside of the side of the tube. 8X Reducer = 480mm focal length at f/5. 7x Reducer 0. This factor is designated by a power that is less than 1, and it usually lies between 0. Figure 3. Shot in Raw mode and converted in Adobe Photoshop using -20% color saturation so as not to clip the black point. Though the Meade LX800-ACF Telescope already has excellent field-flattening capabilities with its Advanced Coma Free optical system, some astronomers might want even more field reduction out of their telescope. A focal reducer is an excellent tool to help you achieve the magnification you need, and at High Point Scientific, we provide you with the best selection. With a 2000mm focal length f/10 telescope like a 8" SC or 8" ACF, both the Antares reducer and the Meade reducer yield a 1260mm focal length f/6. Good for photography though. 3 telescope. 64x) Various lens mounts to Micro 4/3 (0. 5 mm back focus camera is 0. The "S" version is for telescopes with focal lengths from 300-500mm, including most 60-80mm apo refractors. As the aperture obviously does not change this has two effects, firstly the focal ratio becomes faster and secondly the field of view becomes wider. 67x Reducer 0. 73x focal reducer for FSQ-106ED/FSQ-85EDX. The reducer features 2-element fully multi-coated optical design and blacked lens edges in a black  The Altair Astro 1 25" 0 5x focal reducer reduces the focal length of your telescope or guide scope by 50 in most applications. 1. Focal reducers shorten the focal length and speed up the focal ratio of a telescope. 0. 71x) RJ Focal Reducer (0. A telecompressor or focal reducer is an optical element which amateur astronomers use to reduce the focal length of a telescope. Thinner spacer : 100ED/101ED, 125SD, or other scopes of 600-650mm focal length Thicker spacer : 125ED or other scopes of about 800mm focal length Spacers may be installed by the user by unscrewing the front and rear lens assemblies of the reducer and inserting the required spacer. A typical 8" f/10 SCT gives a maximum useful EP focal length of about 70mm. Mainly used for astrophotography, the telecompressor gives a wider angle of view, a sharper picture, and reduces the exposure time needed . Having both adapters gives you lots of flexibility. 25" threaded accessories Revelation 0. This, added to the inability to utilize longer focal ratios for certain objects, led Celestron to design the four-element, fully multicoated f/6. 3m telescope. Also, even with the telescope, there will be vigneting problem 0. 4) becomes a 510mm focal length (at f/6. 63 Focal Reducer & Field Flattener screws onto the rear cell of SCT's, converting f/10 scopes to f/6. The actual focal length reduction will vary a little over or under 0. Remove 'spambegone. This is better than buying the f/6. 3 or f/6. 63x focal reducer and even that there are two versions on the market, one made in Japan and one in China with different focal lengths. 72x) The Orion 0. A lens on a focal reducer behaves exactly like the focal length it is reduced to. 2" to T mount, with included T extension tube for even more reduction. This seam between the blue and black parts is approximately 1mm in front of the CCD sensor according to QSI Imaging technical drawings. Reduction for a 17. 25 wide field imaging scope. 5x focal length reducer help me to reduce the exposure time if I am imaging deep sky objects? I'm using a 1200mm focal length optical tube (f/6), a 32mm super view telephoto extension eyepiece, and a Nikon D5500 (sensor size of 23. g. The Vixen Focal Reducer is made to be used in conjunction with a photo adapter. With a T-mount camera connected directly to the reducer, the focal length is cut in half - 0. 50mm x 1. 37 to be exact). 3 Focal Reducer / Corrector design is a four-element, fully multicoated focal reducer and field flattener. In affect, over-sampling reduces field of view. 3 focal reducer and field flattener 3. Barlow / Reducer: None 0. Specification and lens arrangement of master lens 1 with reducer 1. This system for example doubles the focal length of the front lens, and has a specific (positive) thickness. In general, the larger either one, the larger the effect. 3, 260mm focal length telephoto lens. Mallincam MFR 2” 0. Focal length is 130mm. 0 degrees (1. Backfocus The focal reducer allows me to get decent quality imagery with some older lenses such as the Canon 135mm f/2. I attached the Meade focal reducer to the Microfocuser and the 2" star diagonal to the reducer and inserted the Meade Series 5000 26mm eyepiece. Shorts or wides are the most problematic one. Adapters. 5 to 0. It effectively reduces the focal length of an f10 telescope to f6. I had to swap out the male portion of my t-piece with one that was slightl shorter to make it work. 84: Image circle: 42mm (60% non-vignetted) 22mm (100% non-vignetted) Photo field: 3° (@ 42mm image circle) 1. 50 mm lens on 0. The amount of reduction (R) produced by a focal reducer is a function of the focal length (F R) of the reducer and its distance (D) from the camera’s focal plane: For example the Astro-Physics 0. The focal ratio is F/D. Focal reducer works to reduce the focal length of the telescope as expected. 4 Usable with: VC200L Function: Reduces focal length by 0. 3 (f/7 for 14" models). This optical device reduces the native focal lenght of the Takahashi FSQ-106ED and FSQ-106EDXIII astrograph to 385 mm (F/3. 331mm, the focal ratio is actually f/4. 67 ×is designed exclusively for imaging with Vixen ED81S, ED103S or ED115S refractors. 72x , to adjust the image size to near 1:1 so that the focal length of the image is close to actual focal length of the lens, e. When I had my Fuji X-E1, I used Lens Turbo exclusively with K-Mount glass (it was a travesty that I never got use the Fujinon XF 16-55 f/2. Viltrox EF-M2II mount adapter is designed to allow Canon EF-mount series lens to be used on M43 camera. 5 x 0. 3 reducer I find seems to also correct the image aswell. IC 348 and Friends . Reduces photographic exposure times by approximately 50%. They are also  Focal reducers can also be very useful for astrophotography. Celestron Reducer/ Corrector Lens also reduces field curvature significantly so you get a flatter, well. 375 so let’s call it f/6. 7 by 2. A telecompressor, or focal reducer, is an optical group formula to reduce focal length, increase lens speed, and enhance MTF performance. The reducer is designed to cover a 52mm image circle, corresponding to the diagonal size of the popular KAF-16803 large-format CCD sensor. Mallincam MFR 2” – RC 0. 3 CCD Focal Reducer #07567. Optional Direct Wide Photo Adapter 60 and T-Ring or Camera Adapter 43 and T-Ring needed to mount to camera 0. 63x focal length reducer / field flattener and IDAS light pollution filter on my LX200 telescope. As in the case of a Barlow lens, its reduction factor depends on its focal length and its distance from the focal plane. 1 m Otto Struve telescope at the McDonald observatory. B06040 : BORG 60ED; 0. 25" GSO new 0. 75x focal reducer for Ritchey-Chrétien telescopes is an indispensable accessory for any astrophotographer, as it reduces the effective focal length and focal ratio of your telescope twofold. 4). 5x magnification. 72x Reducer 0. 3 version of the scope because the f/10 versions have a smaller secondary, and, hence, better contrast. Aug 04, 2016 · A focal length reducer also has the effect of multiplying the aperture. Such a setup would yield an image scale of 1. Prime focus photography: T-mount required. Aug 31, 2017 · Focal Reducer: A device that shrinks the effective focal length of the telescope. B05056 : BORG 50FL; 0. 6 m, which corresponds to an image scale of 75µm/′′. 8x, thereby providing a shorter, more optically fast focal ratio. The modded 20D was recording all visible light + the Near IR (i. This high quality reducer for photographic use is designed to shorten the effective focal length of your Vixen VMC200L, VMC260L and VMC330L. The nominal backfocus distance from the Apex ED Reducer's T-threads to the image sensor depends slightly on the focal length of the telescope. 63x focal reducer used in the imager on Sheffield's f/10 robotic telescope, ROSA, which reduces the focal length of the telescope by a factor of approximately 0. Lens is fully multi-coated lens in a black-anodized aluminum filter cell Generally, the 0. As the name implies they effectively reduce the focal length of your telescope. 25" eyepieces, camera adapters, and other accessories. The two main parameters of either extender or reducer are its focal length and the inside separation from the original focus. 73666 Focal Reducer 0. Lens adapters commonly sold under “speedbooster” or similar names, these adapters translate a larger projection circle, like that from a full frame lens, to the smaller sizes needed by APS-C and smaller sensors. 4mm diagonal) CCD or CMOS sensor astronomical camera. In the imaging mode the focal length of the telescope is reduced by a factor of 1. IC 348 Location: Home Monroe, CT Date: 12-10-18, 12-11-18, 12-12-18, 12-18-18, 12-29-18 Camera: ZWO ASI1600MM-Pro Telescope: Orion ED80 80mm f/7. 72 = 54mm for APS-C camera, and about 1. All Im looking for is a focal reducer that only widens the fov and provides a faster aperture. The large format focal reducer has a 2" (48mm) thread on either end, and comes with a T-to-2" adapter to allow use with all T-mount type cameras. For prime focus SLR camera astrophotography, both an optional 60mm wide photo adapter and an optional T-ring appropriate to your SLR camera are required. 3. May be used by kids over 3 years Takahashi Reducer-QE 0. I was surprised at how well the optical concentrator functions at maintaining a relatively close perspective of the original legacy lens. 5x Focal Reducer 2" is a handy accessory that will halve the focal length of any compatible 2"-equipped telescope. 3 focal reducer to compare the differences. Thanks. Mallincam MFR5 with 5mm spacer between elements 6. Also provides much improved field-edge correction. This lens assembly takes your Schmidt-Cassegrain from its native f/10 focal radio down to f/6. For the Celestron reducer with a focal length of 285mm working at f/6. 79× reduction in focal ratio, turning the TSAPO60 into a speedy f/4. Thus, it is rare that one would need focal length longer than about 600 mm with such cameras. F-0. 3, etc? I'd appreciate any tips or suggestions you can offer. 7x Kipon did yet not… The focal length lends itself to magnification. As the aperture   The common f/6. A telescope's fixed focal length and image scale cannot satisfy all conditions particularly when capturing images onto film or CCD. 25 mm thick with a working length of 1. Weight: 83g (2. 75 adapter is 6. J. It is about the size of Celestron’s Radial Guider, which is lucky. So the magnification is F/f. For instance, 15-30mm means that the lens can be anywhere from 15 mm 30 mm. 3° × 4. 3 focal reducer with the small-chip Mallincams for my video runs. Build-in 4groups, 4pcs optical glasses, AF(autofocus) and adjustable aperture,etc Always when it comes to any focal reducers the most interesting field of work are wide angles. 8 arc-seconds per pixel. Presumably, if I place a 20mm spacer between the rear cell and the focal reducer the focal length of the telescope will be different than if I place the focal reducer between the rear cell of the telescope and the 20mm spacer. How do you calculate the true focal length of an SCT with a focal reducer in two different positions. Will Chidlow 6,928 [note: Around 2006-2010 Meade manufactured some f/6. L/L 0 =M. The Celestron f/6. We have increased the versatility of our telecompressor (also called a focal reducer) by designing a variety of accessories for photographic, CCD and visual applications. 8. This faster focal ratio produces brighter images allowing shorter exposure times, than imaging with a slower focal ratio. I think Zyonghi and derivatives deliver decent quality. Telescope focal length, reducer and/or Barlow. 3 scopes to f/4. 5 at 225mm spacing. ] This Vixen Focal Reducer takes the standard 1800mm (f/9) focal length down to 1278mm (f/6. 71 based on the original focal length (equivalent focal length=focal length x0. 3 Reducer Corrector is a must-have accessory for astrophotographers. Hello All, I am wanting to start imaging galaxies (mainly interacting, Arp, etc. It has an SC-thread (Schmidt-Cassegrain A 300 mm focal length lens with a camera with 4. These images, taken with a Meade LX200 SCT, show the application of the Barlow lens to increase the focal length to reveal fine detail, and a focal reducer (FR) to increase sky coverage. 67x for ED Series Usable with: ED81S, ED115S ,  DayStar's Imaging Focal Reducer can give you more field of view in your images. Zincification alloy technology, sturdy and exquisite. 8 Soft Focus lens. Will a 0. You likely know that from the Metabone Speedboosters. 8 on it; it just had to suffice with the vintage Takumars I had). 25" will effectively halve the focal length of a telescopic system when used in conjunction with standard 1. System This f6. E. With focal reducer it is possible to shorten exposure time by 1/F E 2 times (F E <1). A focal reducer is a little piece of magic between two lens mounts. 3 reducer is a 4-element; 41mm dia. In most telescopes the focal length is roughly equal to the length of the tube. 85x focal reducer with my 80ED, the calculation becomes 600mm x 0. The idea of the focal reducer is to decrease the focal length from the native f10 to f6. High Point 1. 72x reduction in focal length AND f/ratio, and in so doing lets in 1 stop more light in exposure terms, gives a wider field of view and purportedly even gives more sharpness as it is compressing the image. The biggest thing here is just how short the focal length of the OWL adapter is. 5x crop-sensor camera (for example a Sony NEX-5). Mar 30, 2019 · Ever wonder what a focal reducer does? In this vlog, I take shots of the moon with, and without the Celestron 6. 8 aperture's lack of bokeh. : Tele Vue 0. 7 while another might require f/2. If the simple calculator doesn't suit your needs, we also offer calculators for crop factor based on sensor size and completely custom lens + sensor Meade's Focal Reducer/Field Flattener is a fully multi-coated, 3 element design to help the astro-photographer capture wide field photographs of the night sky with the Series 6000 APO's. 3 Hyperion to an f/5. 75x Barlow 3x Barlow 4x Barlow 4. 3 focal reducer and field flattener 4. The reducer-flattener features three-element optical assembly and is fully multicoated. 3 and f/3. Another is that d only needs to change slightly to bring about significant variations in x (play with the formulae — or your telescope — to see this) [2] . 4. Joined: Dec 4, 2014 The top-right panel of figure 71 also shows a photograph of the 0. 7x focal reduction ratio): After KIPON released 5 new Handevision models IBERIT full frame lenses with German IB/E Optics, today we release the world's first optic reducer to use […] 0. 8x Focal Reducer/Field Flattener for 115/130mm APO Refractors featuring For Improved Astrophotography Images, Fits 115mm and 130mm APO Refractors, Fully Multi-Coated Optics, 0. 85x reducer (# 7885) Total of 4 elements ; 300mm focal length; F4. For example, a 600mm focal length optical tube (at f/6. You are actually placing it into an (approximately) F10 converging ray pattern, and this shortens the distance behind the reducer  If the object is at fixed distance, has fixed size (and is moving at constant angular speed) and fits frame well: no, you cannot get better photograph of it with focal length reducer. Supposedly all these problems can be abated with the Celestron f/6. This also decreases the effective focal ratio of the instrument. 2. Anybody using a focal reducer for f/7, f/6. Aperture 203 mm (8") / focal length 900 mm / aperture ratio 1:4. A Speedbooster might or might not affect that relationship. Although the Auto Focus of this lens with the focal reducer doesn't work very well; it is easy to manually focus using focus peaking. If you are looking for brighter and wider views or want to shorten your exposure time a reducer is the best way to go. 85x (600mm (f/6. 5x focal reducer effectively halves the focal length of a telescope, enabling lower magnification, a wider field of view, and shorter exposure times for astrophotography. The exact focal length specification of this reducer has not been provided by the manufacturer, but we estimate it to be approximately 101-103mm. 911x. 5x focal reducer cuts the telescopes focal length in 0. 1 and VMC330L to f/8. 63x when the SCT side of it's lens assembly is placed 88mm from the imaging CCD or focal point of an eyepiece. 25" eyepieces. Features Viltrox EF-M2 mount adapter is designed to allow Canon EF-mount series lens to be used on M43 camera. Be sure to use the wide photo adapter to exactly hold the distance from the rear lens surface of the built-in coccrector lens in the focuser. 5x focal reducer provides a nominal reduction of 0. 15" T f/6. 8 times of original's to get a wider field of view Fully anti-reflection coatings on all air-glass surfaces for increased contrast The focal reducer is great for visual use for a bigger FOV and is indispensable when CCD imaging Apr 21, 2020 · Inserting a 0. 5 to f/3. With a T- mount camera connected directly to the reducer, the focal length is cut in half  11 Jan 2019 A focal reducer does the opposite of a teleconverter, reduces the focal length and increases the lens aperture. 71x 1800-1278mm (f6. Specifications. Anti-reflective coated optics. 85 (510mm effective focal length) with an aperture of 80mm equals f/6. The main specification of the eyepiece is the focal length. Assuming a  The Revelation 0. In common lens adapters, cropping effect occurs in all APS-C digital cameras with 1. Use in conjunction with Skywatcher's M48 Canon or Nikon T-ring adaptors (product codes 20237 & 20238 ). 3, the spacing is 105mm. 3 Focal Reducer/Field Flatteners For CCD, photographic, and visual applications. 5mm and an aperture of f/0. I am selling my f6. Choosing the focal length of the eyepiece is very important because it will determine the magnification, the field of the view and the eye relief. The Orion Focal Reducer-Corrector for ED80 Telescope is an economical way to optimize your ED80 for astrophotography with a DSLR camera. 5x focal reducer could screws on to any 1. The deep-sky wide-field astrophotographers will make this accessory as a first choice. Add the 20mm extension tube for 0. Wainwright Meade 6. B06049 : BORG 60ED; 0. right that a focal reducer pulls the focal plane deeper in, so if going deeper in is your problem, a barlow / increasing your focal length is the only solution. It acts as a “wide-angle converter” and changes the focal ratio, or if you prefer, the effective focal length of a scope. 0 degrees with The focal reducer converts the 12. I've tried halving the focal length in the Object Calculator in the Tools Tab. Meade LX800 f/5 Focal Reducer 07595 makes accurate deep sky viewing an easier process by allowing you to see more of the night sky in your viewfinder at once. Collimation manual Bosma Beta RE 3. Nov 15, 2017 · I have the Nikkor 105mm and that is one lens I would like to have a focal reducer to get the focal length closer to the 105 versus the crop factor of almost 160mm. 8x (for f/10) respectively. , this reducer will provide a reduction of 0. 645 to K or 6x7 to K for example not that these exist as focal reducers today. long half only of Mallincam MFR5 7. Reduces Focal length by 0. level 2. 3 focal reducer which I have used only once or twice on my Celestron 8 (203mm) telescope. 25" 2" 3" Accessories. Sep 21, 2017 · And, which is the better focal reducer - the Metabones Speedbooster or the Aputure LensRegain? How does a speed booster effect aperture and focal length? - Duration: 9:55. 25" - 0. Vixen Optics ED80Sf Focal Reducer for NikonThe Vixen Optics ED80Sf Focal Reducer for Nikon reduces the focal length of your telescope optics by 0. 5x Focal Reducer 1. 49" per pixel and a field of view measuring roughly 19 by 13 arcminutes. 15x Barlow 1. The specifications for focal length and aperture are measurements given in inches or millimeters (or both), while the focal ratio is calculated by dividing the focal length by the aperture. our f6 refractors will operate at a very fast f/4. Meade f/3. The Super-Transmission-Coated with 2-element lens system was designed and produced by William Optics, the inner flattener lenses can be set at the op The focal length specification of this reducer is 240mm. The "scale" of a telescope is typically described as its angular magnification. Lepus works well with Measured from the telecompressor flange, this distance works out to 105mm as shown at left. Focal length: 800mm: Focal ratio: F/7. A focal reducer is a group of lenses with a positive power, which decreases the primary focal length of the telescope. 00 Over-sampled images look rather nice because the stars are round with smooth edges but if you have more pixels than are necessary why not use a reducer to reduce the telescope’s effective focal length, which makes the image brighter and enables you to fit more sky on your sensor. I was not using a UV/IR blocker). The focal length of a focal reducer lens is of course fixed but the projection distance (P) is depending on the webcam adapter used and because of that adjustable. Series 4000 f/6. The M42x0. With a reducer to f/6. The focal length reduction will probably not be as much as 1. Extending the F -0. The design reduction factor of a focal reducer is the relative amount by which the effective focal length of the telescope is reduced when the focal reducer is used at its specified working distance or back focus. 7x (for f/8) and 0. The third key specification of a telescope is the focal ratio, which is the focal length divided by the objective diameter. 6, which equals 216mm, yielding a magnification of 8. 71. The Zhongyi Lens Turbo focal reducer is a special type of lens adapter which contains glass elements to give a 0. Since the reducer/corrector is only suited to 1. THE CORRECT DISTANCE FOR THE PUBLISHED FIGURE OF F6. 8x Focal Length Reduction,   VIXEN FOCAL LENGTH REDUCER FOR VC200L. By using a telecompressor element within a lens adapter, you can use the lenses of classic SLR's, while gaining a stop. The lens has a female 1. Reducers are similar to barlows, only their magnification factor is less than 1x. 72 = 54mm. 5 Focal Reducer: Orion 0. -- - Mike. Focal Length: 600mm Focal Ratio: f/7. 5x less exposure, less coma), which is also relatively inexpensive as far as reducers go. (EFFECT ON MAGNIFICATION OF DISTANCE FROM DRAW TUBE TO IMAGING PLANE). A focal reducer is an auxiliary optical device that reduces the focal length of a telescope. The shorter the focal length, the greater the focal reducer’s reduction factor when placed into a telescope’s optical path. For example, the standard 26mm Plössl that comes with most f/10 Schmidt-Cassegrain scopes effectively becomes a 41mm eyepiece with an f/6. For example, a telescope with a focal length of 10 m will have a plate scale of approximately 20 "/mm. 4 (looks like it's really f5. 5x focal reducer halves the focal length of a telescope to deliver a wider field and brighter of view. 62x; Change VMC200L to f/6, VMC260L to f/7. 5X Focal Reducer cuts your telescope's focal length in half Delivers a wide field and reduces exposure times for astrophotography The 0. A focal reducer, also known as a telecompressor, effectively reduces the focal length of your OTA, resulting in a wider field of view. After changing P you need to re-focus. 6; Tele Vue reducers are optimized for 56mm back focus distance (T-Ring shoulder to focal plane). Apr 29, 2015 · 0. Not recommended for short focal ratio systems. Works great for CCD as well. : RD001 0. Visual Backs; Telescope Adapter Plates for Solar Filters; Extension Tubes; Binoviewers. Jul 14, 2015 · Hi all,Ive been looking into focal reducers for my LX200 10inch (ACF). 5 Weight: 12. 72x) Mitakon/ZY Optics Lens Turbo (0. 8X Reducer) f/# faster by reduction in magnification; Example: 600mm focal length, f/7 (TV-85 telescope) with 0. I was surprised by what the focal A 750mm focal length along with the 150mm aperture yields an f/5 focal ratio but with a focal length of 683. Hence, the "working distance" of this specific reducer is estimated to be 51mm, i. brown171 (posted 2017-09-15 13:11:22. A telecompressor or focal reducer is an optical element used to reduce focal length, increase lens speed, and in some instances improve optical transfer function  13 Jun 2019 Most focal reducers are designed to operate optimally at the working distance in the optical path to achieve their specified reduction factor, which  21 Sep 2017 And, which is the better focal reducer - the Metabones Speedbooster can you tell me what kind of lens got the speed booster (Focal length?) 30 Jan 2019 I find lots of great reviews about Viltrox focal length reducers and some half correct explanations about how they work but I could find no real  Buy products related to focal reducer products and see what customers say by aperture) but a camera works better with a faster (shorter focal length) scope. Wainwright M31" Tonight, I tried the focal reducer on my f/5, 80mm refractor with the Mintron video camera (which has a 1/2 inch chip). Camera Compatibility: For M4/3 series cameras, such as Levenhuk Ra 0. Focal Reducers A focal reducer is a lens system that mounts on the rear cell of a scope in front of a flip-mirror, camera, or diagonal and eyepiece. 85x to enable imaging at f6. On the TOA-150, it reduces the focal length of 1100mm (F/7. Wide Photo Adapter 60 (items 3876 for Canon EOS or Four Thirds and 3878 for generic types) and T-Ring for your camera are needed for prime focus photography to 0. For a given focal length one lens might be usable at f/1. 4) with the focal reducer attached. The camera typically employed used to be a 35mm SLR. Popular applications include photography, videography, and astrophotography. The focal length of the eyepiece is f. 5°). It's called a focal reducer or speed booster, metabones makes many, however they come with caveats. A teleconverter makes the image circle of a lens wider, so it can work on the same sensor/film size as the lens you attach it to was originally intended for. This revolutionary new WO AFR-IV Adjustable Flattener / 0. The focal length reduction and the f-stop gain cannot be separated. 3 Focal Reducer (arrow) threads on to the rear cell of any Meade LX-series mirror- That was more or less okay. S. 1 micron pixels, resolves 2. DayStar's Imaging Focal Reducer can give you more field of view in your images. The focal reducer portion shortens the focal length which widens the field of view, allowing larger deep-sky objects and constellations to be fully realized in the images. 5x Barlow 1. The goal would be to try and get the focal length in the 700- 900 mm range. 7x BAVEYES PENTAX645-SONY E 0. Active 11 days ago. focal length is also required to obtain an adequate field of view with smaller sensor size. 7 (2740mm focal length). This focal reducer is designed for Vixen's VMC200L, VMC260L and VMC330L Reflector Telescopes. 5x focal reducer has been designed to be used with a wide range of modern CCD cameras and eyepieces. With 1/4" socket mount. Rather than battling White Balance I decided to simply show you the Moon in monochrome. Nov 30, 2016 · If you are looking for a simple lens adapter to mount say Pentax or Minolta lenses to a Fuji they can be had for $20 on eBay. 72, adjust the image size to near 1:1, so that the focal length of the image is close to actual focal length of the lens, e. 556 and there is a focal reduction factor of 0. FOCAL REDUCER and bahtinov mask. Jan 17, 2014 · The focal length will be 200mm and the f stop will be 5. The issue of focal length and positioning of various makes of focal reducers is a bit of a minefield. 75 times the focal length of the instrument, i. 25" eyepieces and photographic accessories. The eFinder consists of the focal reducer lens described above plus the 3 inch long "eFinder" extension tube which together form a 100mm focal length f/4 telescope. 6, but I will use that number for the examples. With the new (2014) reducer, the focal length is 698mm at f5. A focal length reducer would be one for the big boys, all the awesome of a 24-70 f2. ,) that will require a longer focal length than my C-11 at f/2 with HyperStar provides. 6FR Focal Reducer - Results. 2 lenses for better correction - cemented together and coated, black-anodized aluminum housing. 5 mm lens. The equivalent focal length of the BTA reducer is 15. Rather than adding a Barlow to a short focal length OTA, I wanted less glass in the light stream when viewing the moon and planets. In addition, it acts as a field flattener. 13 is a schematic diagram of an example camera system CS that includes an objective lens OL, a camera body 1306, and a focal reducer FR as disclosed herein operably disposed between the objective lens OL and the camera body 1306 so that the combined focal length is less than that of objective lens OL. 5 ♢ Custom-built The reducer brings the system up from f/4. 65) granting an image circle of 44 mm (6. 8 lens Jan 06, 2011 · A focal reducer is a group of lenses with a positive power, which decreases the primary focal length of the telescope. Sign up for our newsletter to get the best deals and latest news Jul 18, 2006 · Adding a f/6. The lin-ear size of the nonvignetted field of view is 28 × 28 mm in the plane of the detector. 71X focal length multiplier, APS-C camera can take full frame pictures. Focal Ratio – Faster, Brighter, Smaller. 71), which help enlarge 1 level aperture. The "crop factor" doesn't affect the focal length. Viewed 34 times 2 $\begingroup$ Say I have a With a 2000mm focal length f/10 telescope like a 8 SC or 8 ACF, both the Antares reducer and the Meade reducer should yield a 1260mm focal length f/6. 11-27-2017, 09:42 PM Focal length mm Use Speedbooster or another focal reducer ? Select a focal reducer, if applicable Canon EF, Nikon G/F or Leica-R to BMPCC (0. 3 Focal Reducer Nov 26, 2013 · The focal reducer is placed between the lens and the sensor. The "flange to focal plane" distance on a Canon camera is 44mm in the grand scheme of things with a telescope, this will not significantly alter the focal length of the image. 8L lens including its perspective but sized down to 14-35 T2 or However, we're still stuck with 2. 25" threads, and can be stacked with additional 1. The field flattener/focal reducer offers 55 mm of back focus from the rear flange. Aug 31, 2012 · For each T2 extension tube length, I measured the distance from the back edge of the AP-27TVPH focal reducer to the "seam" of the QSI-540ws camera body. Focal Reducer Art No. 63x Reducer 0. 5 Focal Reducer. 85x and provides much-improved field-edge correction. 5 times. 64x, which equates to a field of view of approximately 15 Moon widths. 85x Focal Reducer/Corrector for Sky-Watcher BLACK DIAMOND ED120 Designed for serious Astro-Imagers. - Allows focus infinity. Focal reducers shorten the effective focal length of telescopes to provide wider visual fields and faster f-ratios for astrophotography. 4)). This is advantageous when using cameras with small chips for imaging. FOLKS: I JUST RAN ACROSS THIS WEB SITE REGARDING 0. 5 Apochromatic Refractor Telescope Barlow: None Focal Length: 600mm f/7. As in the case of a Barlow lens, its reduction   In addition to reducing the focal length and f/ratio the. 645-RD F/5. So, I didn't exactly miss the wider field of my Ultima 8 OTA, Celeste, when equipped with her reducer-corrector. This magnification can be calculated with the formula : M=1 - P/F r (with P and F r in millimeters) Standard focal reducers like the Meade F/6 The TSRed279 is a four-element Riccardi-style reducer and corrector in a 2-inch push-fit body that offers a 0. Director of Photography 1 point · 3 years ago. The biggest concern is the optical quality of this configuration. 3 Focal Reducer/Field Flattener:An important advancement in high-resolution focal reduction systems, the Meade 4-ele-ment, multi-coated f/6. 7x BAVEYES MAMIYA645-SONY E 0. Product Description. All four lens elements within the reducer are fully multi-coated to maintain image quality. 7 X is not available for visual observation as the telescope's focal length to the focal plane is widely shifted from the original position. This useful digiscoping accessory lens includes an adapter compatible with Canon EOS digital cameras. 25 05X focal reducer cuts your telescopes focal length in half Delivers a wide field and reducer exposure times when conducting astro photography The 05x Focal Reducer from High Point has a 2 element optical design with fully multi coated opti The 125 5x focal reducer is a great accessory that allows for great flexibility Apparently, with focal reducer, the length between reducer and sensor of the camera is very precisely defined. 5X Focal Reducer The 0. Plus 0. 85x and provides much improved field-edge correction. 5X Focal Reducer 1. One of the connotations of all this is that a Barlow that is its own focal length inside the original focal plane (d) will produce a collimated (i. 5X Focal Reducer. Items 1 - 25 of 74 A focal reducer, also known as a telecompressor, effectively reduces the focal length of your OTA, resulting in a wider field of view. I have seen several figures quoted for the focal length of the Meade 0. 85X focal reducer and corrector for Pro ED80. A focal reducer is developed for CQUEAN (Camera for QUasars in EArly uNiverse), which is a CCD imaging system on the 2. Most know teleconverters / tele extender - this is a negative lens system, a corrected kind of a diverging lens. Short focal length telescopes and ideal seeing conditions provide the smallest stars, longer focal lengths and less favourable are necessary why not use a reducer to reduce the telescope's effective focal length, which makes the image brighter and enables you to Simply enter the telescope's focal length, the camera's pixel size and your sky's seeing conditions to determine if they are a good match :-). 5x 15. This makes the telescope a "faster" system with a wider field of view and brighter objects, requiring shorter exposure times when doing astrophotography. 8x Reducer 0. 75x focal reducer has a focal length of 700mm. 6° (@ 22mm image circle) Spot sizes: Center of field : 12µm Edge : 12µm (@ 42mm image circle) Photo size formats: APS / DSR-DSLR compatible: With TOA-RD reducer; Focal length: 610mm: Focal ratio mmCalc is a super simple photography focal length calculator. 4 FROM F9 APPEARS TO BE  The TS optics 0. 5x when the center of its lens assembly is placed 51mm from the focal Mar 04, 2017 · Why use a focal length reducer? Well, most folk in inter-web camera land and seem rather too pre-occupied with super shallow depth of field these days, which I suspect is a symptom of only looking at pictures as small web sized images on Facebook and Instagram. Increasing the field of view and decreasing the exposure time to dramatically increase your density or signal to noise ratio. 5x reducer shortens the focal lengths of the telescope by 50% and doubles the lens speed and field of The TSO-TSVF1 rises the distance between reducer and chip and increases the reduction factor from 0. - Reduces focal length to 0. 2) 50mm Nikon lens (U. 8 as maximum (prior to breaking out the diopters). The Meade 0. 44x in 4/3 sensor. This clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality. So in effect - when you mount a (for example) 50mm f/1. 62X reduction of the telescope's effective focal length. Can Be Used With Any Telescope. The GSO 0. gduncanson battery sherpa. TOA 130, Flattener, and QHY8 Imaging Train The ScopeStuff branded focal reducer (based on the pictures on their web site) is really the GSO. 6x focal reducer produces an effective focal length of 360×0. 9; APS-C coverage . 8; APS-C coverage . The light will be coming out one of the pivots for the Dec. 5X, for Observing and Imaging: This focal reducer lowers the focal length of the main optics by half, providing a larger field of view. 3) to 840mm (F/5. 0oz) This Sky-Watcher 0. 5X, depending on spacing. 9. Using a 2x Barlow the effective focal length becomes 600mm x 2 which is 1,200mm making for f/15. I'm wondering what might be the best eyepieces to use with this long focal length scope Dec 11, 2015 · Kipon announced the world's first focal reducer that will let you use medium format lenses on full frame cameras (the focal length and aperture will be adjusted based on the 0. They now offer a total of four adapters: BAVEYES HASSELBLAD-SONY E 0. The new Reducer-Flattener reduces the effective focal length to create shorter exposure times that result in better, brighter images. If this works, what brands of focal reducers are recommended and does anyone have sample photos of birds taken with the set-up I'm considering (Mak, focal reducer, and DSLR at prime focus)? A focal length reducer makes more sense when going from FF to a smaller sensor, because the FF lenses are very common and come in all shapes and sizes I also wouldn't expect this to be done by Pentax, just look at how long it took them to make that 1. Choose the right focal reducer for you scope here at OPT! 11 Jan 2019 Canon has been working on their own focal length reducers. 8x Field Reducer and Flattener reduces your telescope focal length and speeds up the focal ratio by 20% while flattening the lens curvature to capture clear and sharp images during prime-focus astrophotography using formats up to 35mm. A 0. 40 mm. 71x focal reducer, expecially with sensors up to APS-C format, but now with the new SD Reducer HD focal reducer you can have an even better field correction over a 44 mm image circle, although we reccommend sensor up to 36 mm image circle because of vignetting at the edge. It also The Vixen Optics ED80Sf Focal Reducer for Cannon EOS reduces the focal length of your telescope optics by 0. If the limited factor of exposure length is mount drift, the exposure time can be extended by 1/ F E times. The 24-70 mm f/2. Works great with any Schmidt-Cassegrain telescope. The nominal backfocus distance from the Apex ED reducer's T-threads to the image sensor depends slightly on the focal length of the telescope. A focal reducer works using a positive lens, which shortens the focal length by causing the incoming beam of light to converge more quickly. 9° with a cropped ASP-C DSLR. Again, a well designed focal reducer will seek to minimize aberrations. 726 times), even with the APS – C machine you will be able to shoot at the lens’ original angle of view. This is the Flattener/Reducer designed for the SVX102T and SVX102T-R using the 3" Stellarvue focuser. 3mm) . S. Jul 20, 2013 · The only focal length reducer that mounts on the rear of the lens I have ever heard of is one which only reduces the size of the image circle to a smaller format coverage, in order to both produce more angle of view. 5! May 25, 2011 · Using a focal reducer would mean moving to a shorter focal length eyepiece, the 42mm would vignette. Backfocus. 283 arcsec) over This superb quality accessory effectively reduces the telescope's focal length by a factor of 0. This accessory telescope lens reduces the focal length of your telescope by 0. Focal reducers can also be very useful for astrophotography. Results are amazing both visually and photographically. Keep in mind to  Buy Meade Series 6000 0. Hence, the required spacing of this specific reducer is 88mm, i. Effectively reduces the telescope’s focal length by a factor of 0. It is hard to actually record more detail than about 2 arc-seconds in long exposures due to atmospheric turbulence. It simply can’t come close enough in guider port of Radial Guider. f/ mm Here is an analysis of your telescope's performance using the parameters selected above: Click here You can now have a focal reducer for your larger size (up to 28. 8x Reducer was made for 500-1000mm refractors. 77229 Focal Reducer for VC200L f/6. The Revelation 0. The C14 was operating at f/7. 75x Meanwhile, the "S" version is suitable for use with telescopes that have focal lengths ranging from 300 mm to 500 mm which includes the majority of 60-80 mm apochromatic refractors. 8 lens (with fullframe coverage) to a 1. A focal reducer also need an image circle larger than the system adapted to. 60") Vixen ED80Sf Focal Reducer is an accessory made for Vixen Telescopes. When mounted piggy back on a larger telescope, the combination forms an electronic finderscope and guide scope with a field of view of 2. Fixed Focal Length Lenses have the ability to be focused for different distances; Fixed Focus Lenses are intended for use at a single, specific working distance. This adapter reduces focal length to 0. 7 at 50mm spacing to about 0. I hope that the focal reducer will help achieve the unique bokeh :) Your 50mm Trioplan might work a treat with the FR :) Kindest regards Jennifer The Focal Reducer AX103S 0. Now, a new Japanese patent discovered by Canon Rumors shows that Canon […] FIG. The new Reducer-Flattener reduces the effective focal length to create   Items 1 - 10 of 13 The Revelation 0. Sep 12, 2012 · Focal reducers were developed primarily for long focal length (slow f/ratio) Schmidt-Cassegrains, in order to reduce exposure time needed for deep sky objects. 37. And I found I could still use the Meade f/3. The reducer shortens the focal length by a quarter and corrects the image circle - thereby converting your telescope into a fast astrograph! Assembly The connection to your telescope and camera occurs over an M63 x 1 thread. My C-11 is vintage 1991. 4x TC! 0. - Switching camera to "Shooting without lens" mode is essential. 5x Focal Reducer, Focal Length Reducer, Astrophotography bobgraze@sbcglobal. However, when coupled with a star diagonal, a t-piece, and a Canon T3i, my Nexstar 8SE does not have enough play in the focus knob to bring items into focus. Short answer: A telescope consists of (conceptually, at least) two lenses, an objective lens and an ocular lens (or eyepiece). 6 focal length reducer becomes a real 15--44 mm f/1. If you have a 0. It is not a corrector or flattener. It reduces the effective focal length to create shorter exposure times that result in better, brighter images. 0; 35mm full-frame coverage . So, a bit pointless really, what with that and the extra elements in the light path. This Vixen Focal Reducer takes the standard 1800mm (f/9) focal length down to 1278mm (f/6. ♦ Reducer shortens the effective focal length of Schmidt-Cassegrain telescope optical system by 37%. 63, i. Usage: General use product. Some other guides that might help: Visually, some reducer lenses also allow rich field viewing with medium focal length 1. Every f/6. This reducer/flattener converts the 102 mm f-7 714 mm focal length objective into a 102 mm 535 mm focal length f-5. the focal ratio changes from f/10 to f/6. This focal  Items 1 - 24 of 83 Focal reducers shorten the focal length and speed up the focal ratio of a telescope. While technically this was designed for the f/8 system, through user experiences and our subsequent testing we have concluded that our 3-inch field flattener/reducer performs very well with Results shown below with the 20D attached to the T-Adapter stub. Although originally developed for the Explore Scientific ED-APOs 127mm and 152mm, the reducer can be used Oct 31, 2012 · Just to be precice, on a c8 the focal length is 2032, as such the reducer takes you to 1280. These are useful when taking pictures of nearby large objects, such as nebulas. It will take the light from a larger part of the lens than the crop sensor would use and compress it to fit a smaller sensor. 4 by 2. 8x Focal Reducer for Refractor Telescopes Mount: Orion Atlas Pro Filter Wheel: ZWO EFW 8x 1. Depending on the scope, you can employ either a "focal reducer" or a "barlow" to decrease or increase the focal length. This focal reducer will fit most 2" eyepieces, T-adapters and other imaging accessories. An important advancement in high-resolution focal reduction systems, the Meade 4-element, multi-coated f/6. 85x Reducer 1. A telecompressor, speedbooster, or focal reducer is an optical element used to reduce focal length, increase lens speed, and in some instances improve optical transfer function (OTF) performance. When this distance increases, the reduction is more pronounced. This particular model is best suited for use with Ritchey-Chrétien telescopes. 85x reducer which covers 35mm full format; Optimized for 500mm to 800mm focal length; Achieves very flat illumination; Compatible with Takahashi and Vixen refractors Focal Length Of The Eyepiece. It allows CQUEAN to secure a wider field of view by reducing the effective focal length by a factor of three. Meade f/6. The telescope to be designed has a primary of 9 inches and has a focal length of 60 inches and it is going to be a R-C design. 6x Barlow 2x Barlow 2. Furthermore it enlarges the image circle. 73x Reducer 0. This allows both for a wider field of view and a significant reduction in exposure if doing astrophotography. The Tele Vue RFL4087 0. Increasing the field of view and decreasing the exposure time to dramatically increase your density or signal to noise r I should look for a quality focal reducer if I want to reduce focal length. 7x reducer (# 7870) Total of 5 elements ; 280 mm focal Jun 04, 2009 · The reducer changes the apparent focal length of the telescope, but from the perspective at the eyepiece it doesn't matter what the "actual" focal length is--that's just a physical number that is pretty much irrelevant to your observing or your photography. I then aimed the telescope at the Double Cluster. But todays digital imagers are specialized for astrophotography. Ask Question Asked 11 days ago. ® f/6. Focal Reducer, 0. 8 with a 1. 133) Shapley Lens / Focal Reducer. Visual observation: Cannot be used with 73839. There are practical limits to this. 75x Focal Reducer for GSO Ritchey Chretien OTA Reduces GSO Ritchey Chretien Telescopes from f/8 systems to f/6 - incr Regular Price: £93. Also, the focal length is not the physical distance from the front of the lens to the sensor. 71x) Focal Reducer for the VC200L Reflector Telescope reduces focal length from 1800mm f/9 to 1278mm f/6. Any telescope can have its focal length increased (for more magnification) by using a Barlow lens or reduced (to increase field of view) by a focal reducer or positive lens. 4. I don't want to spend money on something and realize it won't help my issue. The reducer/corrector not only reduces the focal length but also operates as a very effective field flattener. 71x reducer = 35. Hence, the specifications for a typical telescope, for example the ubiquitous Celestron C8, are as follows: 8" (203mm) clear aperture, 2032mm focal length focal ratio: Eyepiece focal length: Focal reducer . 87, enlarging by the same factor the imaged area of the sky on the CCD. parallel) beam. 3 reducer, with a 149% brighter image and 56% wider field than its normal view. 3 for a significantly wider field of view. The Explore Scientific 3in 0. 3x, but is  Also known as a focal-reducer, the Lepus provides a 0. The combination yields a system having a focal length of 35. 58x) Nikon G/F or Leica-R to Micro 4/3 (0. Scheme below shows Barlow lens extending the original cone and, by the same factor M , multiplying the focal length and image magnification, i. Thus the correct working distance to yield a 0. So if I use my 0. That being said, if you're going into AP, an F/10 is an all around better option anyways, since if you really want that short focal length, you'd use a focal reducer and/or a Hyperstar. 5X FOCAL REDUCERS Dec 13, 2003 · Celestron Focal Reducer/Field Flattener This item threads on the back of an 8" SCT and reduces the focal length by 37%. 4 (0. 7x Reducer - Corrector reduces the effective focal length of a particular instrument by the factor 0. With the old reducer, the focal length is 754mm at f5. 25" eyepieces vignet anyway (from a focal length of about 26 mm on, depending on the eyepiece  Mogg Adapters - Astronomy Imaging Adapters - Webcam, SLR Lens, Focal Reducers, Outback Peltier Cooler for Meade Deep Sky Imager. Focal length reducer has three effects: it makes image brighter  23 Oct 2018 The new Speedmount EF & Speedmount PL focal length reducers are now set to ship with the PL version shipping in 1-2 weeks and the EF mount in 3-4 weeks. 33X. 8mm (1. Focal reducer. Look forward to your input! Ron Abbott I suspect that a good long focal length 2" EP without a focal reducer will provide a better view than a shorter length EP with the reducer. Specifications: Focal length = 220mm; Clear aperture = 40. A Focal Reducer is mounted to the 1. Focal reducers are great for astrophotography and visual use. Focal Reducers & Flatteners Focal reducers and flatteners for faster exposures and wider fields of view with astrophotography, reducers shorten the effective focal length Celestron f6. The effective focal length will be approximately 0. At the beginning of this year I acquired an AP 6" f12 Super Planetary refractor and Losmandy G11 with HD tripod. The focal length of a lens defines the lens’s angular field of view. 85mm focal length, reduction factor of about 0. 33x Reducer 0. 6FR away from the CCD give you an even greater focal length reduction. The focal length is not changed. Luckily Tokina manufactured a very interesting lens for Canon (and other systems): 11-16/2. 67× ・The Focal Reducer ED0. Telescope Accessories. 5x Barlow 2. 5X. net #66605 . 25" accessories, there are no long eyepiece focal lengths available. Effective Focal Length (EFL) is the focal length affected by the camera’s crop factor. 5x Reducer 0. Patent 4,621,909 example #3) combined with a perfect paraxial focal reducer having a magnification of 0. 46X. Its just that you need longer focal length eyepieces to reach the same magnification on the F/8 vs the F/10. 255mm focal length; F3. 5x or 0. Fujiphotog, Jul 12, 2016 #16. Design and Development The first step is to make some proto types and do some testing. Apr 14, 2016 · The good thing about being cheap is you don't worry about losing too much if you're not that satisfied. net' and reverse to send e-mail. Simply input your focal length, sensor size, and max aperture and we'll give you what the 35mm equivalent is of that configuration. Optimized for the Sky-Watcher BLACK DIAMOND ED120, this superb quality accessory effectively reduces the telescope’s focal length by a factor of 0. 3 Focal Reducer without a diagonal in a refractor with a 2” focuser. This includes most larger (100mm+) refractors and all RC and ACF telescopes. 85x. This equates to a true field of 3. 5" f/8 Hyperion to an f/5. 8 grades aperture scale. 3 focal reducers with a focal length of around half what they should be making them unsuitable for use with SLR cameras or filter wheels, any marked "Japan" are OK, as are later "China" ones. 4) to 510mm (f6. I’ve very recently obtained an Antares 0. 5x 9. For the correct adjustment of the reducer/flatener we can offer you an adjustment flange. 25" Filter: ZWO R, G, B, L Autoguiding right that a focal reducer pulls the focal plane deeper in, so if going deeper in is your problem, a barlow / increasing your focal length is the only solution. 6 Reducer [TKA31580L] Specific to the TOA-130F and TOA-150 refractors, the 645-RD reducer is simply an optical piece of art, as only Takahashi can conceive some. 93oz). The #94175 Reducer/Corrector Lens is not compatible with Celestron EdgeHD optical systems. 5x reducer shortens the focal length of the telescope by 50% and doubles the lens speed and field of view. 67T × will reduce The focal reducer will work equally well with any scope in the 400 - 800 mm focal length range and is not limited to the ED80. Sep 03, 2016 · Kipon announced plenty of new medium format focal length reducer E-mount adapters. The numbers in the lens’ manual show some focal length values that this particular lens can use. 25" eyepiece filter thread and can be attached to camera and eyepiece nose barrels to achieve a 40% increase in field of view. 7x reducer increases the aperture by one stop. Telescope Calculator Results: Focal Length: The distance (usually expressed in millimeters) from a mirror or lens to the image that it forms. The working focal length of the camera is 14 mm. For aftermarket uses the compression ranges from about 0. The Vixen focal reducers are for astrohpotograhpy only, with the exception of the Focal Reducer ED80S/ED102S/FL102S (AP-FR-3637) that can also be used visually. 25x Barlow 2. So with that said, yes your fov increases, yes your focal ratio is lower, and yes it is fantastic for both visual and photography. Provides a 2 to 1 reduction. 7x BAVEYES PENTAX67-SONY E 0. 1. The SpeedMount reduces the full frame (43. This is designed exclusively for use with the 80mm ED and optimized for photography with DSLR cameras. 25 system, making each telescope nearly twice as fast. Constructionally, the reducer was made in the form ofseparate remotely controlledunits Just add a t-mount (we sell inexpensive models), slip this in you 2" focuser and add your 35mm camera. 5X Focal Reducer from High Point has a 2 element optical design with fully multi coated optics The lens cell is anodized black to reduce stray light reflections Very Useful Reducer. Mallincam MFR5 5. Specification and lens arrangement of master lens 1 (18-  2 Jun 2017 Focal reducers work because they sit between the camera and the lens and focus the light coming through the lens down to close to the correct size of the sensor. Use in conjunction with a DSLR-M48 Ring Adapter. Nov 07, 2017 · Thanks to the installation of 3 groups of 4 high quality reducer lenses (focal length 0. The Vixen Optics f/6. The problem of course is that it is quite slow at f/10, has a very demanding 2350mm focal length and has quite some coma on an APC-S sensor. On micro 4/3 cameras it's very easy to achieve any long focal length. " Dr. Focal  Check my comparison testing of focal reducer field of view (FOV) Extending the F-0. 3 Focal Reducer/Field Flattener threads on to the rear cell of any LX90, LX200 or other Schmidt-Cassegrain model and is typically used with an Off-Axis Guider or T-Adapter. 3 focal reducer with either their SCT or refractor, they will not be able to use a diagonal due to a lack of focus travel if the focal reducer is installed before the diagonal. 8x. Complementing this, the fully multi-coated 3-element flattener improves the sharpness - especially at the edges - to ensure you are able to resolve stars to clear pinpoints. 2x Barlow 5x Barlow Stacked from 16 exposures of 30 seconds at ISO 200 plus 14 exposures of 30 seconds at 1600 with 0. The TOA 130 is a 1000mm f7. The focal length changes. This makes the telescope a faster system with a wider field-of-view and brighter objects, requiring shorter exposure times when doing astrophotography. Use: Using the focal reducer is ingeniously simple. 7 system, and the 16" f/7. It is a number written on the eyepiece, and it is measured in millimeters. 75x reduction is When we use a focal reducer, the focal plane will be closer to the lens, but the focal plane in the camera cannot move closer to the mount. The optical point spread function without seeing effects is designed to be within one pixel (0. The product referenced is not a simple adapte it is a focal length reducer so effectively it a a lens to sit between the camera and the Leica glass and as such it will and does have a considerable cost associated with it. Images taken by Dr. I wanted a barrel. 7x reducer (# 7870) Total of 5 elements ; 245 mm focal length; F4. Moreover, long focal length 1. 6). For using Micro Four Thirds (M4/3) mount digital cameras with all Pentax K mount lenses. 6 lbs Glass: Schott BK-7 and FPL-53 ED Recommended Field Flattener/Reducer: Sky-Watcher 0. I’ve got a large selection of longer focal length ultra-wide apparent field eyepieces. Performances were good also with the former 0. After some testing I’ve discovered it works quite well for reducing the focal length and lowering the focal ratio of my 90mm Maksutov. The clarity there was important to me. 9mm or less; 10-19mm; 20-29mm; 30-39mm; 40-49mm; 50-59mm; Eyepieces by Barrel Size. Examples of Fixed Focus Lenses are many Telecentric Lenses and Microscope Objectives. However, I was unable to reach a focus. The lens (and adapter) cannot get inside the mount either. I have found that threading the reducer directly onto an eyepiece works well. In most cases the focal reducer decreases the focal length by  15 Apr 2018 The focal reducer has approx 210mm focal length when measured against a target at infinity. I have no idea if that is true. If used with a CCD of 1000 x 1000 pixels, each of 10 microns  It's the easy way to get better images from your Orion 80mm ED Apo Refractor telescope. focal reducer. 4) Prime focus photography: Requires 73876 or 73878 adapter plus T-mount Weight: 85g (3. Figure 1 above shows a fast (f/1. With this little scope at least, the focal reducer gave excellent results right to the edge of the field of view. What about the rest of the sky? A focal reducer would work, but most reducers are built as a thread-on unit. Using the Focal Reducer ED0. 5 FR1 0. 25” eyepieces barrel and provides a nominal reduction of 0. Below are images showing how to use the Meade f/3. 1 adnd VMC330L to f/8. Build-in 4groups, 4pcs optical glasses, AF(autofocus) and adjustable aperture, etc. Eyepieces by Focal Length. Focal length reduced (e. This gives wide fields and great color corrected images. ・he Focal Reducer ED0. But a quick-and-dirty measurement of it's focal length indicates it has a focal length of about 96mm. 71x focal length reducer, you simply multiply the focal length of the lens by 0. 4, you bring that down to about 45mm. You would get the lens separation automatically once you have the focal length. Binoviewer Accessories; Collimation. 3 Reducer/Corrector. 8 mm. 3 Achromatic Refractor Complete Kit - Vixen Manual Clutch #3828 Meade Instruments f/3. This Flattener was designed to reduce the focal length of the Meade Series 6000 APO Refractors to expand the field of view with the camera being used. 85x focal reducer/flattener is optimised for the Sky-Watcher Evostar 80ED PRO refractor. Manual operation, manual focus, manual aperture & etc. This superb 0. Unfortunately, Orion’s StarShoot Auto Guider cannot be brought in focus together with the camera. short half only of Mallincam MFR5 (= MFR6) 8. Easily threads into standard 1. The Sky-Watcher EvoStar 80ED has been an extremely popular choice for amateur astrophotography enthusiasts for years. The focal length of the objective lens if F. 5x focal reducer effectively halves the focal length of a telescope, enabling lower magnification, a wider field of view, and shorter exposure times for astrophotography Threads into eyepieces, camera adapters, and other accessories with standard 1. axis so the focal plane will be about 5. This Focal Reducer for Vixen's VC200L Reflector Telescope takes the standard 1800mm(f/9) focal length down to 1278mm (f/6. 71x. 7 focal length APO triplet lens refractor. The reducer features 2-element fully multi-coated optical design and blacked lens edges in a black anodize aluminum filter cell. 6mm). The Focal Reducer can be used in two different configurations: 1. 4x Reducer 0. On the actual device, the nominal distance can be varied by +/-5mm with the compensation ring. Hello Does anyone know how to tell APT you are using a Focal Reducer? I'm not able to Plate Solve and I think the reason is because I'm using a 0. 6 without it. 5x focal reducer is often used togeth A focal reducer is developed for CQUEAN (Camera for QUasars in EArly uNiverse), which is a CCD imaging system on the 2. focal length reducer

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