I recently acquired a first-generation Auto Rikenon 28mm f2.8 m42 lens, and looking to get a yellow lens filter for it. I've been trying to find info on this Tokina-made lens in hopes to discover what exact filter size it is. After looking around and comparing, my first guess is that it would be 58mm, but not certain. Would y'all agree?
@Dali
Yeah, a caliper would be key. I'll figure it out. I just thought that I'd throw this out there to see if anyone a little more familiar with Auto Rikenons than I am.
-Paul