[rustigsmed (Russell)]

Hi Graz,

FOR IMAGING APPLICATIONS
1) Back off set screw under flange (D) so you can unscrew lens assembly.
2) For use with DSLR cameras (APS size chips recommended, as full-size chips will show vignetting). Tele Vue Canon Wide-T Adapter CWT-2070, or Standard T-Ring Adapter TRG-1072 attaches directly to the Paracorr Type-2 flange.
3) For CCD cameras, use Tele Vue Imaging System accessory tubes with Tele Vue camera adapters, or A2A-1107 adapter for cameras with 2" nosepieces. Best back focus is approximately 55mm from flange face.
http://www.televue.com/pdf/literatur...structions.pdf

https://www.optcorp.com/tele-vue-t-r...to-t-ring.html

It is 55mm.

I'd consider going something with my BF in case you decide on going OAG down the track.

All the best,

Russ