Specifications. Typically SCT F/6.3 focal reducer/correctors also flatten the field since SCT have a serious amount of field curvature. Reviews & Ratings for William Optics 2" APO Apochromatic Field ... 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. Focal reducers are great for astrophotography and visual use. William Optics Zenithstar 81 APO - First Light Optics While helping out in the OPT booth at the Arizona Science & Astronomy Expo, 1-2 November 2014, . SHARPSTAR F4.4 Full Frame Focal Reducer made especially for 94EDPH refractor . $29.00. 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, . Add to Cart Add to Wish List Antares. William Optics 2" APO Field Flattener and 0.8x Focal Reducer WE-FLAT-3 with a thumbscrew to lock it into place! Hi Everyone, need a little help choosing the right flattener/reducer for the William Optics Zenithstar73. New Adjustable Flat73A for Z73. William Optics GT71 APO is a f/5.9 air-spaced triplet FPL-53 apochromat. Adjustable reducer flattener Flat73R for Z73 - William Optics $255.00. 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). +1-800-504-5813 Contact Check Order Status. FILTERS: Astrodon Ha 3nm-31mm, Astrodon OIII 3nm-31mm, SII 3nm-31mm INTEGRATION: 28.4 hours William Optics Flat6AIII 0.8x Reducer & Field Flattener - M63 to 2" . First Light: William Optics Flat6A III Flattener & 0.8 Reducer ... Will be amazed (and pleased) if you manage to illuminate the whole chip with the 3.3. William Optics 0.72x Reducer / Adjustable Field Flattener 8 for GT153, FLT 132 & 102GTS # P-. View fullsize. The large 50mm clear aperture lens will reduce vignetting to almost nil. William Optics 2" APO Field Flattener and 0.8x Focal Reducer WE-FLAT-3 is part of our massive variety of . 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! Browse our full product choice for the tools and merchandise you need to tackle the task at hand. What can a field flattener or focal reducer do for my telescope? In Stock. 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 . Categories Categories Brands Brands. William Optics Adjustable Flat6A III 0.8x Reducer / Flattener This revolutionary new William Optics AFR-IV Adjustable Flattener / 0.8x Reducer was made for 500-1000mm refractors. William Optics 2" APO Field Flattener and 0.8x Focal Reducer WE-FLAT-3 Reviews. William Optics Adjustable Reducer Flattener Flat61R for Z61. This high-quality flattener has been engineered and CNC machined for usage with William Optics' GT153, FLT 132, 102GTS, and other APO refractors. In this review, I'll tell you why I think the William Optics Zenithstar 61 is a top contender when it comes to . William Optics 0.72x Reducer/Flattener 8 - P-FLAT8 Both optical correctors and focal reducers are designed to work best when the focal plane is at a set distance away. 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. All flatteners accept 2" threaded filters. plus shipping costs. . Super high precision "COPPER" T mount for Canon EOS full frame Cameras. . If you are looking for brighter and wider views or want to shorten your exposure time a reducer is the best way to go . On the back, it features an M48 thread for attaching nearly any camera. Recommended field flattener for William Optics GT71, GT81, Z81 and Z103. The focal length of the Vixen FL55 is 239mm, with a focal ratio of F/4.3 (with the optional reducer used). Posted August 14, 2015. The large 50mm clear aperture lens will reduce vignetting to almost nil. 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. Additional Information . William Optics ZS 66 SD and focal reducers - Stargazers Lounge Revolutionary new WO x0.72 Adjustable Reducer/Flattener made for f/6 - f/7.8 refractors. Posted February 18, 2011. I am after one that does both jobs so that rules out the dedicated Flat73 which is just a flattener! Wish List Compare. 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 . Astro-Multispectra Series; Dual . 11 were here. This accessory is a must-have for refractor astrophotography. William Optics Flat6A III 0.8x Adjustable Reducer Flattener HK$1,780.00. I use a 1x Hotech flattener (which in fact can be used for any scope between f/5 and f/8) on my William Optics 81 GT IV and have been happy with it - although it isn't a reducer (so focal length is the native 478 mm). Free US Shipping. Flattener / Reducer; Astronomy Filters. Adjustable Reducer / Flattener for William Optics GT71, GT81, ZS103 Telescopes. Focal reducers shorten the focal length and speed up the focal ratio of a telescope. . Shop for focal reducers, coma correctors, and field flatteners from your favorite brands Tele Vue, Baader, Antares, . This compact refractor bridges the gap between a camera lens and a telescope. Revolutionary new WO x0.72 Adjustable Reducer/Flattener made for f/6 - f/7.8 refractors. The focal ratio of a telescope represents its light gathering ability, and the Z73 hits the sweet spot. More details on the William Optics page under Products > Accessories > Flatteners 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 . William Optics RedCat 51II - Upgraded Version. William Optics 0.8x Reducer / Flattener III - Stargazers Lounge 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. Im back into astronomy after a 20-year hiatus. Table 3 shows the properties of each focal reducer and summarizes which reducer works with which William Optics telescope. . William Optics P-F6A-GT81 Focal Reducer / Focal Length Make sure to look at full selection of Telescope Accessories from William Optics that we provide at everyday discount prices. Evoguide 50ED Vs RedCat Z51 - Wide Field Astrophotography 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. Reducers/Flatteners | First Light Optics
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