The TE-TRF-2008 0.8X 2-Inch Reducer/Flattener for - 400 mm to 600 mm Telescopes by Tele Vue:
This reducer converts TV-85 to 480 mm f/5.6 and Pronto to 380 mm f/5.4 for flat field, fast photography. Fully multi-coated 3-element unit inserts directly into 2-inch focuser, accepts standard T-rings for 35 mm cameras. Also it can be used with any 400 to 600 mm refractor.
Important Note: The Tele Vue 0.8X Reducer/Flattener for 400 mm to 600 mm Telescopes was designed for an optimum 55 mm back focus. (Distance from flange surface to film or CCD plane). If you use a CCD, be sure the spacing between flange and CCD is 56 mm +/-2 mm for best results.
Tele Vue 0.8X Reducer/Flattener for 400 mm to 600 mm Telescopes Review: "This accessory is a must-have for someone planning to use the TV-85 photographically" - review in Sky & Telescope, July 1999.
OPT Product Number: TE-TRF-2008
Note: All Tele Vue products are available to ship world-wide from OPT, and effective July 1, 2008, are covered by a Five Year Worldwide Limited Product Warranty! Always be sure to save your original packaging materials should you need to return any Tele Vue product for warranty or repair.