Originally Posted by Just1MoreDave
It's one of the best 135mm lenses, particularily in screw-mount. There are two S-M-C versions. They have a part number stamped into the bottom (camera side) of the auto/manual switch. The better one is 43812, but 43802 isn't that far behind. The 43812 version was carried over into K-mount, and there's a thread down a bit from that lens.
Wow, great info. How does the Super Takumar version stack up to these two?