Leitz SBKOO 21mm viewfinder brand_Visibledust complete with lug clips

complete with lug clips

This macro lens provides 1:1 magnification with a shiftable axis and plane of focus

which does not appear to affect function

you can use it on any brand of lens with a 77mm filter diameter- not just Canon

2 Pro-Tessar lens

Leitz SBKOO 21mm viewfinder brand_Visibledust complete with lug clipsThe Leitz SBKOO is a metal bodied 21mm viewfinder designed to slip into any standard hot shoe. This one is in good condition overall, with no dents or dings in the metal housing, but: there's a small chip at one edge the front glass, outside the optical path, which doesn't affect the view, and there's a bit of dust inside, including a large speck in the centre of the front element which you can see if you focus your eyes right (or wrong, as the case