To sharpen the format of your 35mm film format, TeleVue have produced Field Flatteners (or focal reducers)
that will screw into their 1¼" or 2" standard camera adaptors.
TRF-2008
0.8X Reducer/Flattener converts TV-85 to 480mm f/5.6 and TV-76 to 380mm f/5.0 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.
NPR-1073
Is a 0.8x Reducer for all NP and NPis scopes used with imagers of up to APS-size format. For NP101/127 (non-"is") it requires the RAD-1074 Reducer Body Adapter for 2" focusers.(see below)
RFL-4087
Is a 0.8x Reducer/Flattener for TV-102 and TV-102iis scopes and any 800-1000mm focal length refractor for imaging with up to 35mm camera formats. For TV-102 (non-"iis") it requires the RAD-1074 Reducer Body Adapter for 2" focusers (see below).
RAD-1074
Is
Reducer Body Adapter for 2" focusers and is used with the RFL-4087 for the TV102 and with the NPR-1073 for the NP scopes
RPF-2804
1.1x auxiliary lens that sharpens the 35mm film format performance of both the TV-76 and TV-85. It screw-mounts to the
2" or 1¼" camera adapters. To attach your favourite 35mm camera, just add your T ring!
The field flattener extends the specification to 528mm f/6.9 on the TV-76 and 660mm f/7.8 on the TV-85.
All Tele Vue products are available in the UK from Venturescope