ninjin
Established
Is it possible to use a collapsible lens on R-D1?
According to R-D1.info, yes:
http://r-d1.info/camera-use/problematic-lenses/
I have a collapsible Summitar 50mm f2 from 1949 and if I did my measurements correctly it doesn't go as far back as 20.5 cm (damn close though). I don't have an R-D1 though, but one can always dream.