I have this Zenit that has uneven shutter action on 1/500. Managed to find an online tutorial on how to adjust the speeds. Pulled the bottom off and had trouble right away when the instructions said "first, loosen the stop screws on the two shutter speed adjusters". What stop screws? All I have are some screw holes were they're supposed to be, and there's no sign of they're ever being installed either. That explains things on the shutter issue.
OK, the lens is a keeper, so I'll buy a Japanese camera and put the lens on that. I wanted to avoid the older cameras w/ cloth shutters, so I bought a Sears KS1000 (Pentax clone) w/ a metal shutter for cheap, but since it is K mount I needed an M42 to K adapter. The official Pentax adapters are a little dear, so I opted for the $6 Chinese special. The instructions that came w/ it were a little vague, but I eventually saw that the adapter needed to go inside the K mount (there's a small recess in the lens mount). No way would mine fit. I had to file it down quite a bit until it went in there.
Screwed the lens on and went outside to ck focus and saw that it wouldn't make infinity. Hmmmm. Turns out that not only did they make the adapter too big in diameter, it's also too thick. Back out w/ the file and I finally got it down to the level of the K mount on the camera. It still won't quite make infinity even though I took a little off the lens mount itself, but it's "close enough" I think. I'll run some film thru it tomorrow and see, but at F5.6 and above it should be fine on infinity shots. Everyone moans about these Chinese adapters, but I didn't know they were this bad.
Moral of the story. Buy Japanese, or even better, buy German from the beginning. They actually measure stuff before they ship it! The strange thing is, how did the Russians manage to make such great lenses?
OK, the lens is a keeper, so I'll buy a Japanese camera and put the lens on that. I wanted to avoid the older cameras w/ cloth shutters, so I bought a Sears KS1000 (Pentax clone) w/ a metal shutter for cheap, but since it is K mount I needed an M42 to K adapter. The official Pentax adapters are a little dear, so I opted for the $6 Chinese special. The instructions that came w/ it were a little vague, but I eventually saw that the adapter needed to go inside the K mount (there's a small recess in the lens mount). No way would mine fit. I had to file it down quite a bit until it went in there.
Screwed the lens on and went outside to ck focus and saw that it wouldn't make infinity. Hmmmm. Turns out that not only did they make the adapter too big in diameter, it's also too thick. Back out w/ the file and I finally got it down to the level of the K mount on the camera. It still won't quite make infinity even though I took a little off the lens mount itself, but it's "close enough" I think. I'll run some film thru it tomorrow and see, but at F5.6 and above it should be fine on infinity shots. Everyone moans about these Chinese adapters, but I didn't know they were this bad.

Moral of the story. Buy Japanese, or even better, buy German from the beginning. They actually measure stuff before they ship it! The strange thing is, how did the Russians manage to make such great lenses?
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