I have this Mamiya Sekor 55/1.8 that I got from my grandfather. It sat in a closet for like 20 years and the other day I was at my dad's house and I found it. I realized it was M42 screwmount (there's an old ratty body to go with it), and I wanted to use the 55 on my ME, because it's the chrome-accented version, and it would look oh-so-sexy. However, it's got this blemish on the rear element:
So that's fungus right? It also appears to have delaminated or eaten away part of the coating on the rear element.
So I attempted to disassemble the lens, and after a couple of tries, I got the back element group off. The problem is, it's on the FRONT side of the back element, and there's another element attached in that group. Try as I might I couldn't get the two apart, and I was sure I'd break them if I tried any harder. Is it possible that they're glued together?
So I put it back together and stuck it on my K-x and it seems to take nice shots, at least on the crop sensor. I couldn't see any evidence of the fungus blurring the photos or being visible.
The question is, will I see it on full frame? I don't want to waste any film finding out.
Also BTW, I also found a Super Takumar 200/4 but the aperture ring doesn't work
Too bad, because it's in GREAT shape cosmetically and optically. If anyone has any suggestions on how to fix that I'd appreciate it.