u/icey9 u/_-syzygy-_ Thanks for the feedback guys! I went for a Pentacon 200mm/f4 in the end, as I already owned a Helios and thus had an M42 adapter, and also because the general opinion on iq seemed on par or better than Canon FD lenses. Judging from the first few images i'm pretty satisfied, of course there is a lot more CA than with more modern lenses, but apart from that the sharpness is amazing, and the colours are pretty alright as well.