I have an M42 adapter for my Olympus Pen F half-frame SLR. These are some pictures I made with an old Praktica 200 mm tele lens. 200 turns into 300 mm equivalent since it's half frame so you get super tele! Visit my Etsy shop for tele-lenses and M42 mount cameras!
THE EXPERIENCE MIGHT BE BETTER THAN THE RESULTING PHOTOGRAPHS ourbooksmalmo@gmail.com