Share. I removed the focal reducer and did some lunar observing. such as the William Optics RedCat 51, is that the focusing mechanism . What I've done is measure the FL back from the primary lens. VAT. The William Optics 0.8x focal reducer is also available to reduce the focal-ratio to a fast . Purchase your new William Optics 2" APO Field Flattener and 0.8x Focal Reducer WE-FLAT-3 from Opticsforyou.com today and you will appreciate the easy checkout process, . Star Diagonal has been born!Introducing New model William Optics Dura-Bright. Additional Information . . AVX Bubble Level NexStar Evolution Control . William Optics 2" APO Field Flattener and 0.8x Focal Reducer is especially recommended for users of the William Optics Megrez 80, 90 and 110. I don't think the Celestron reducer will make any sort of contribution to a flat field with the ZS66 Steve but will be very interested to see the result. William Optics 0.72x Reducer / Adjustable Field Flattener 8 for GT153, FLT 132 & 102GTS # P-. At this point you could technically say you're done, but I also saw a recommendation to se the FLT91's focal length to 21mm as a rough start point. Prime Focus William Optics 0.8x Reducer / Flattener v2 William Optics 0.8x Reducer / Flattener v3 William Optics New Adjustable Flattener 61A for Z61 and GS61 - P-FLAT61A. with a thumbscrew to lock it into place! Add to Cart. Make sure to look at full selection of Telescope Accessories from William Optics that we provide at everyday discount prices. New Adjustable Flat6Alll (T-mount not included) This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. Im back into astronomy after a 20-year hiatus. I have a used, but like-new William Optics .8x Focal Reducer/Field Flattener III for the WO 72mm Megrez, WO Z70, Megrez 80, Megrez 102 and FLT-110 (not compatible with the M110). It is full frame ready and was designed for . William Optics Flat6A III 0.8x Adjustable Reducer Flattener HK$1,780.00. Vixen Focal Reducer For VC200L £241.00. First Light Optics - Suppliers of Astronomy telescopes, binoculars and accessories from Skywatcher, Celestron, Meade, William Optics, Atik, Imaging Source, Starlight Xpress, ADM, Moonlite, Catseye, Hutech and others. You're currently reading page 1; . Flattener / Reducer; Astronomy Filters. Will be amazed (and pleased) if you manage to illuminate the whole chip with the 3.3. plus shipping costs. All flatteners accept 2" threaded filters. This William Optics 0.8x Flattener/Reducer has been designed to optimize the flat-field imaging performance of William Optics GT71, GT81, Z81 & Z103 refactors. $279.00. Full frame size. This adjustable William Optics 0.72x Reducer/Flattener is a revolutionary new device suitable for use with f/6 to f/7.8 focal ratio refractors such as the WO GT153, FLT132, and 102GTS. This revolutionary new William Optics AFR-IV Adjustable Flattener / 0.8x Reducer was made for 500-1000mm refractors. The Super-Transmission-Coated with 2-element lens system is designed and produced by William Optics, the inner flattener lenses can be set at the optimum 66mm-86mm back focus distance (Distance from flattener . Sky-Watcher .85x Reducer/Flattener for Evostar-72ED Pro (6 . The large 50mm clear aperture lens will reduce vignetting to almost nil. The focal length of the Vixen FL55 is 239mm, with a focal ratio of F/4.3 (with the optional reducer used). This 0.72X Focal Reducer and Field Flattener shortens the effective focal length a bit more than the FLAT7A, taking it from the native f/7.8 to f/5.6. This Adjustable Flattener is made for use with the ZenithStar 61 telescope. Mallincam - Focal Reducer with Spacer - USED . The NEW William Optics Zenithstar 81 APO features an air-spaced doublet lens with an Ohara FPL-53 ED glass element in a CNC machined ultra high precision lens cell with fully multi-coated optics for high resolution, high contrast images virtually free of false-colour. Shop for focal reducers, coma correctors, and field flatteners from your favorite brands Tele Vue, Baader, Antares, . What is this doing, and what magnification would I get with a 25mm eyepiece? William Optics recommends the FLAT68III for the best image quality of the three choices. Product Details. William Optics Flat6AIII 0.8x Reducer & Field Flattener - M63 to 2" . . The William Optics Reducer-Flattener is a great accessory that improves image quality by being able to adjust spacing without the need for extension tubes. $255.00. My experience with an ED80 and a QHY8 hasn't been so great. with a . Standout Features This William Optics 2" Field Flattener & Reducer has been designed to optimize the flat-field imaging performance of William Optics GT71, GT81, Z81 & Z103 refractors. This high-quality flattener has been engineered and CNC machined for usage with William Optics' GT153, FLT 132, 102GTS, and other APO refractors. Typically SCT F/6.3 focal reducer/correctors also flatten the field since SCT have a serious amount of field curvature. Reviews. This elegantly designed 2" reducer / flattener has been designed to optimise the flat-field imaging performance of William Optics f/6 to f/7.5 refractors. The William Optics Zenithstar 73 APO has an f-ratio of F/5.9. It will provide good illumination and flat field across 97% of full frame sized sensors. Provides high resolution images when used for astrophotography or wildlife photography and is a convenient ultra-portable telescope . Features of William Optics 2" APO Apochromatic Field Flattener and 0.8x Focal Reducer for 66mm to 90mm Refractors WE-FLAT-2: This very elegant 2" reducer/field flattener has been designed for optimal results with the 66mm series of telescopes, although it is functional also with other 80 or 90mm refractors. The Z61 is the most portable telescope ever made by William Optics, a company with a reputation for building beautiful astrophotography refractors.. $101 . Lens Posted August 14, 2015. Adjustable reducer flattener Flat73R for Z73 . William Optics: GTF81 or GT81 + Flattener? William Optics 0.8x Reducer Flattener 7 (Black) for FLT132 and GT153 only GT102 (optional) $658.00 This revolutionary new WO FF68III Adjustable Flattener was made for 6 -7.5 F ratio refractors. This reducer is made specifically for William Optics scopes (where it threads directly to the focuser) - GT71, GT81, Z81, Z103. William Optics RedCat 51II - Upgraded Version. The Field Flattener and Reducer has 2″ threads on the opposite side to accept a 48mm (Wide) T ring for your DSLR . This high-quality flattener has been engineered and CNC machined for usage with William Optics' GT153, FLT 132, 102GTS, and other APO refractors. FLAT6AIII special edition for Fluorostar 91 . If you don't space the focal plane (e.g. New William Optics Flattener 68III . +1-800-504-5813 Contact Check Order Status. . The APO triplet optics of the Flat6AIII are made with Ohara glass and fully multi-coated to provide good . . . - posted in Refractors : Hi. Full frame size. Categories Categories Brands Brands. FILTERS: Astrodon Ha 3nm-31mm, Astrodon OIII 3nm-31mm, SII 3nm-31mm INTEGRATION: 28.4 hours Page. with a thumbscrew to lock it into place! The focal reducer for the AX103S Refractor telescope is designed for APS-C format cameras. Just remove the three screws on the focuser adapter, take off the adapter, and thread the focal reducer/field flattener on in it's stead. Product Details. When I switched back to a single 2" 24mm UWA eyepiece, the views of the moon, while very nice, were rather disappointing by comparison after having used the Binoviewers for . By all accounts the Skywatcher reducer is a much better performer with an ED80. Steve says: "The William Optics Zenithstar 61 is a portable, well-made refractor with a short focal length of 360mm making it ideal for wide-field observations. 11 were here. More details on the William Optics page under Products > Accessories > Flatteners While helping out in the OPT booth at the Arizona Science & Astronomy Expo, 1-2 November 2014, . The f/4.9 focal ratio allows for fast light-gathering power on this wide-field telescope. Hot. The William Optics RedCat 51 Petzval APO is unlike any other telescope on the market. Versatile f/6.9 native focal ratio or f/5.5 when used with 0.8x flattener . In Stock. I am after one that does both jobs so that rules out the dedicated Flat73 which is just a flattener! This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. This Full Frame reducer from William Optics is compatible with several types of cameras including various DSLR models and both CCD and CMOS astronomy cameras. . Ex Tax:£74.80 . Adjustable Reducer / Flattener for William Optics GT71, GT81, ZS103 Telescopes. . Antares 0.63x Focal Reducer for F/10 Schmidt-Cassegrain - SCTFR. In Stock. The back focus is listed below for each style of William Optics telescope or other DSLR you choose to use. Designed with nearly Full frame chip-size DSLR cameras in mind. I have a William Optics Zenithstar 61 telescope. Increase your filed of view on the Zenith Star 73 with the William Optics 0.8x Reducer with built in rotator. The Vixen model does not include a carry case orBahtinov mask in the . It threads onto the rear cell of 5" to 16" Celestron and Meade Schmidt-Cassegrain telescopes, making it possible to have a dual focal ratio instrument without sacrificing image quality. That means the base of the mounting threads of the focal reducer needs to be 55mm from the camera sensor to achieve the design reduction . William Optics Flat6AIII 0.8x Reducer & Field Flattener - M63 to 2". Revolutionary new WO x0.72 Adjustable Reducer/Flattener made for f/6 - f/7.8 refractors. . So I was wondering if I could get away with the Flat6 0.8 reducer which does say it works on scopes 70 - 80mm f/6 but doesn't list the ZS73 . Super high precision "COPPER" T mount for Nikon full frame Cameras. William Optics give an overall distance of 71.06 mm from rear off the concave lens on the reducer to the chip on the camera, 6.68 mm from the concave lens to the flat flange on the reducer this leaves 64.38 mm left according to William Optics, i`m using a atik ccd camera which has around 13 mm from front of camera . Shop for focal reducers, coma correctors, and field flatteners from your favorite brands Tele Vue, Baader, Antares, . All New Adjustable . In Stock. For DSLR's adjust the space ring to 1.8mm to get the required 55mm of back space when using a standard T-Ring. William Optics Red Dot Finder Kit with Vixen Style Mounting Base . That means I'm getting a larger field of view and shorter exposures. Add to Cart. William Optics 0.8x Reducer & Field Flattener 73R for ZenithStar 73 Brand new adjustable field flattener and 0.8x reducer for the William Optics Zenithstar 73 OTA. William Optics Adjustable Reducer Flattener Flat61R for Z61. Takahashi - TOA 645 Flattener 0.99x for TOA-130NS . WO 0.8X Focal Reducer CAMERA: ZWO ASI1600MM Cooled Pro GUIDING: Lacerta M-Gen II Autoguider. Compare. For a little more than ⅓ the price of the Redcat, the Evoguide 50ED looks like a real bargain, even when adding the cost of the much needed field flattener. If there is to be a . on William Optics 2" APO Field Flattener and 0.8x Focal Reducer WE-FLAT-3 | + FREE Shipping over $49! Hi Everyone, need a little help choosing the right flattener/reducer for the William Optics Zenithstar73. Using the FLAT73R reducer/flattener greatly increases the available field of view. Additionally, the 0.8 reducer reduces the focal length of the GT-81 from 478 mm to 382 mm and brings down the focal ration from f/5.9 to f/4.7. Adjustable Flattener Reducer Flat73R for ZenithStar 73. Provides good illumination and a flat field across 97% of a full frame sensor field of view. 2" DCL-52 Digital Camera Lens Adapter with 75mm Focal Length from William Optics for Digital Camera Astrophotography This innovative digital adapter .. £89.76. IC 1318, The Butterfly Nebula in SHO narrowband false colors. Recommended field flattener for William Optics GT71, GT81, Z81 and Z103. This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. Free US Shipping. The adjustment ring allows for precise adjustment to get the correct spacing. FMC tripllet APO . It features a 45mm image circle for use with sensors as large as full frame, while also retaining your ZenithStar 61's native focal length! William Optics 2" APO Field Flattener and 0.8x Focal Reducer is especially recommended for users of the William Optics Megrez 80, 90 and 110. The Evoguide wins hands down here. Diameter: 51mm Focal Length: 250mm Focal Ratio: f/4.9 Weight: 3.2 lbs Glass: FPL-53 Recommended Flattener/Reducer: None (Petzval Lens Design) The William Optics RedCat 51 is not only an incredibly useful apochromatic telescope/lens for astrophotography, but it is also one of the most beautiful optical instruments in . For example, many focal reducers designed for f/7 or f/8 ED refractors such as those from Tele Vue, William Optics, Sky-Watcher, and Meade are designed to have a working distance (or back focus) of 55mm. 48mm T mount for Canon EOS - Space Gray. Recommended Accessories. This accessory is a must-have for refractor astrophotography. William Optics P-F6A-GT81 Focal Reducer / Focal Length - posted in Beginning Deep Sky Imaging: Ive been successfully using this focal reducer with my William Optics GT81 since about 2016, This focal reducer is rated x0.80 and with the Wilialm Optics GT 81 scope FL 478mm Ive therfore always calculated to be an equivalent FL of 382mm (478 x 0.80 Super high precision "COPPER" T mount for Canon EOS full frame Cameras. Lens This focal reducer and field flattener consists of a four-element multicoated 40mm lens in a metal cell. The focal ratio of a telescope represents its light gathering ability, and the Z73 hits the sweet spot. Additionally, the 0.8 reducer reduces the focal length of the GT-81 from 478 mm to 382 mm and brings down the focal ration from f/5.9 to f/4.7. too expensive? . SKU: U-MAL-FR-WSPACER . Focal reducers are great for astrophotography and visual use. William Optics RedCat 51. William Optics 0.72x Focal Reducer & Field Flattener. $86.00. $218.00. on William Optics 2" APO Field Flattener and 0.8x Focal Reducer WE-FLAT-3 | + FREE Shipping over $49! That means I'm getting a larger field of view and shorter exposures. Reducers are similar to barlows, only their magnification factor is less than 1x. William Optics 0.72x Reducer / Adjustable Field Flattener 8 for GT153, FLT 132 & 102GTS # P-. Make sure to look at full selection of Telescope Accessories from William Optics that we provide at everyday discount prices. This Vixen Focal Reducer takes the standard 1800mm (f/9) focal length down to 1278mm (f/6.4). This accessory is a must-have for refractor astrophotography. Price. Features of William Optics 2" APO Apochromatic Field Flattener and 0.8x Focal Reducer for 66mm to 90mm Refractors WE-FLAT-2: This very elegant 2" reducer/field flattener has been designed for optimal results with the 66mm series of telescopes, although it is functional also with other 80 or 90mm refractors. Stargazers Lounge - MartinB's Album: MartinB's DSOs - Picture. +1-800-504-5813 Contact Check Order Status. Add to Cart. The reducer/corrector duplicates the rear cell . Designed with nearly Full frame chip-size DSLR cameras in mind. It is worth noting at the outset here, that William Optics recommends the v2 reducer for this telescope but does not recommend the v3 reducer. Revolutionary new WO x0.72 Adjustable Reducer/Flattener made for f/6 - f/7.8 refractors. M48 Camera Side Threads Maximum Backfocus GT71 = 64.1mmGT81 = 62.1mmZ81 = 60.2mmZ103 = 57.5mm Adjustment Setting for 55mm Backfocus GT71 = 9.1mmGT81 = 7.1mmZ81 = 5.2mmZ103 = 2.5mm . This compact refractor bridges the gap between a camera lens and a telescope. $284.00. Hyperion Focal Reducer 3D Printed 3D Printed. £39.00 Add to Basket. Dave - Centroid has used the 3.3 with an ED80 and an H9 and found it very effective. Antares 0.7x Focal Reducer for F/10 or Higher Telescopes - FR2-0.7. Anyway like ZWO's backlog due to Corona, William Optics is in the same situation. Cyclops Optics provides exclusively FREE screw smoothing service to all William Optics telescopes. Focal length: 478 mm: Focal ratio: f/5.9: Image circle: 44 mm with Flat6A-III (97% full frame illumination) . The William Optics GT-71 APO Triplet refractor features a 3-element f/5.9 objective with an Ohara FPL-53 extra-low-dispersion glass element for optimum colour correction and a new upgraded dual-speed 2.5-inch Rack and Pinion focuser with 1:10 Dual Speed. Product Description. and thread the focal reducer/field flattener on in it's stead. camera sensor) at the recommended distance away from the corrector, then the corrector will not work as intended. . I had found enough evidence of others having success with this on other scopes that I decided to try it. On the back, it features an M48 thread for attaching nearly any camera. Items 1-24 of 215. SHARPSTAR F4.4 Full Frame Focal Reducer made especially for 94EDPH refractor . Our Price: $768.00. $625.00. William Optics 0.8x Reducer Flattener 7 (Black) for FLT132 and GT153 only GT102 (optional) $658.00 This revolutionary new WO FF68III Adjustable Flattener was made for 6 -7.5 F ratio refractors. 43 mm image circle is perfect for full-frame cameras in this 51 mm aperture petzval refractor. If this scope is 100% photographic, then the GT-81 plus a flattener makes sense. The NEW William Optics Zenithstar 73 APO III features an air-spaced doublet lens with fully multi-coated optics and an Ohara FPL-53 ED glass element for sharp, high contrast images virtually free of false-colour. Wish List Compare. Browse our full product choice for the tools and merchandise you need to tackle the task at hand. Browse our full product choice for the tools and merchandise you need to tackle the task at hand. The large 50mm clear aperture lens will reduce vignetting to almost nil. Zenithstar 73II APO. It's ok but when blown up to a decent size the peripheral stars aren't really very good. This is a Fan Page for William Optics Scopes. Astro Essentials 0.5x 2" Focal Reducer. Add to Cart Show more Service & Support . . It reduces focal Length by 0.7x, changing to f/5.6. IC 1318, The Butterfly Nebula in SHO narrowband false colors. Simply loosen the set screws on the side and your adapter will rotate 360 deg. Jump to. William Optics produces several models of focal reducers for their telescopes. Both optical correctors and focal reducers are designed to work best when the focal plane is at a set distance away. Check great and honest reviews! WO Flat6A lll will. Add to Cart. William Optics; Home ; Accessories ; Telescope Accessories ; Reducers, Correctors & Flatteners; Reducers, Correctors & Flatteners.
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