TS Optics 3-inch 0.79x ED reducer corrector for APO refractor telescopes
This is the big 3" ED element reducer/flattener from TS - TSRED379.
0.79x reduction and field flattening, and zero vignetting for APS-C or full frame sensors.
Modified version of the Riccardi reducer. Backfocus depends on focal length - see TS website for all the details.
Used lightly for several weeks, in like-new-in-box condition. No longer have my big refractor, putting this for sale. It works with essentially all M68 threaded and M63 threaded focusers (M68 to M63 adapter needed for M63 focusers) from many brands that use Kunming United Optics focusers, or Moonlite, Feathertouch and more.
It screws directly to an M68 thread using male M68, but also has a removable built in adapter allowing threading using M68 female. Metal screwed end caps on both sides. Furnished as received from TS.