TeleVue 0.8X Reducer/Flattener for 400mm - 600mm Telescopes
Model 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.
"This accessory is a must-have for someone planning to use the TV-85 photographically" - review in Sky & Telescope, July 1999.
TeleVue 0.8X Reducer/Flattener for 400mm - 600mm Telescopes Review
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.
- Additional Information
SKU TE-TRF-2008 Manufacturer Tele Vue Barrel Size 2" Warranty 5 Year Warranty
- Included Items
- Televue 0.8X Reducer/Flattener for 400mm - 600mm Telescopes
- Five Year TeleVue Warranty
- Questions & Answers
Product QuestionsQuestion by: Michael Philbin on Dec 10, 2015 11:57:00 AMUnfortunately, 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 would need to use a reducer that does not do any correction. Please contact us if you have any questions.Answer by: Chris Hendren on Dec 10, 2015 12:04:00 PMQuestion by: Peter Vasey on Jul 20, 2015 12:52:00 AMThis 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 others that are not reducers that will work better for your scope.Answer by: Chris Hendren on Jul 25, 2015 10:12:00 AMWould be a good fit for a combination of an Orion EON 80mm ED (f/6.25 & 500mm) and Nikon D750 (full frame DSLR)?
ThanksQuestion by: Richard Tregeagle on Jan 14, 2017 7:57:00 AMUnfortunately, 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 instead. Even this may only correct for ~40mm image circle.Answer by: Chris Hendren on Jan 15, 2017 12:04:00 PM
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