Filters

When you buy a new Russian optic, with it's original case, you get filters in bonus, generally three: UV, Yellow-green, Orange. Here are the ones for Tair 11A (55mm) and those for Mir 10A (67mm) with reduced thickness to avoid light loss.

And here, filters to be screwed at the back of the lens, body side: on the left the ones for Peleng and on the right the ones for Mir 20M.