Tele Vue 0.8X Reducer - 400mm - 600mm TelescopesModel TRF-2008 0.8X Reducer/Flattener converts TV-85 to 480mm f/5.6 and Pronto to 380mm f/5.4 for flat field, fast photography. Fully multi-coated 3-element unit inserts directly into 2" focuser, accepts standard T-rings for 35mm cameras. Also it can be used with any 400-600mm refractor.
Important Note: The Televue 0.8X Reducer/Flattener for 400mm - 600mm Telescope was designed for an optimum 55mm 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 56mm +/-2mm for best results.
Televue Product Number: TRF-2008
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 TeleVue product for warranty or repair.
Questions & AnswersAsk a Question
Is this the flattener you recommend for the APM 105/650 Super APO Refractor? Thank you.
This reducer will not properly flatten the field for the APM scope in question as it is designed for smaller and slower f/ratio scopes like the TeleVue 76 and 85 - where it works very well. There are other flatteners by Hotech, Teleskop Service, and othe
Would this work well with an Astro-Tech 65 ATQ which has a 420mm focal length at F6.5?
Unfortunately, no. TeleVue told me that this is a reducer/corrector designed to correct coma and field curvature on small, fast, standard design refractors. With a flat field astrograph like the AT65EDQ, this will add those aberrations back in. You wou
Would be a good fit for a combination of an Orion EON 80mm ED (f/6.25 & 500mm) and Nikon D750 (full frame DSLR)? Thanks
Unfortunately, this reducer will only correct for an APS-C image circle. It does not appear that Orion makes a reducer for the EON 80 that will cover an image circle large enough for the D750, so your best bet will be to use a dedicated field flattener