Quote Originally Posted by Nige
Another hijack...

Is there more than one 45mm lens? I bought a 45mm 'bayonet' lens shade thinking it would fit my 45/2.8 (Sekor-C I think) but it's too small. (lesson to onesself to research before buying...)
Nige,
Looking at the KEH site M645 Lenses it would seem that there are at least two different filter sizes: 67mm and 77mm.

Kent