Add to Cart. +1-800-504-5813 Contact Check Order Status. WO GT71 Backfocus? - Refractors - Cloudy Nights . William Optics 0.72x focal reducer/field flattener P-FLAT8 FLAT6AIII special edition for Fluorostar 91 . William Optics 2" APO Field Flattener and 0.8x Focal Reducer WE-FLAT-3 William Optics GT71 APO is a f/5.9 air-spaced triplet FPL-53 apochromat. Telescope - Flattener / Reducer - Page 1 - Cyclops Optics This is a Fan Page for William Optics Scopes. William Optics - Posts | Facebook VAT. $284.00. Recommended Accessories. This Vixen Focal Reducer takes the standard 1800mm (f/9) focal length down to 1278mm (f/6.4). 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 Adjustable Flat6AIII for FLT91 - David Astro $86.00. Using the FLAT73R reducer/flattener greatly increases the available field of view. View fullsize. Add to Cart Show more Service & Support . William Optics US$284. New Adjustable Flat73A for Z73. 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 . Full frame size. Adjustable reducer flattener Flat73R for Z73 . 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. 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 . Recommended field flattener for William Optics GT71, GT81, Z81 and Z103. SKU: U-MAL-FR-WSPACER . William Optics New Adjustable Flattener 61A for Z61 and GS61 - P-FLAT61A. Correctors, Focal Reducers & Flatteners - Optical Accessories ... 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 . William Optics GT-71 II 2019 - Checked & Tuned - First Light Optics This will be handy if you also are going to install a Electronic Automatic Focus (EAF . 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. William Optics recommends the FLAT68III for the best image quality of the three choices.

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