Topic: Lens collar for 3M5CA Russina mirror
This may be little off-topic...
I am using a Russian 3M5CA mirror lens with my Pentax DSLR, the lens is the newer version that smaller and does not have tripod screw mount, I want to get a compatible collar for it, I don't have the right tools to measure the lens diameter, as far as I can tell it is about 78mm, and the closest match is this one :
Before I hit the purchase button could someone tell me if that will fit, or somewhere else to look for it ? thanks !