Rollei Bay 1 Hellrot (light red) filter viewing filter pretty much anything: it has

pretty much anything: it has a 6cm ball

This helicoid extension tube lets you seamlessly adjust magnification for close-up work with your Pentax 67 and nearly any Pentax 67 lens (not included)

Stop sticking your fingers in chemistry

minor internal dust which does not affect imaging

4 Nikkor Pre-AI is in excellent condition with only minor cosmetic wear

Rollei Bay 1 Hellrot (light red) filter viewing filter pretty much anything: it hasThis is a Rollei Hellrot (AKA light red) filter for Bay 1 TLR lens fitting, found on many Rollei and Yashica TLR cameras, among others. Very light coating marks which will not affect imaging.