| Author | Message | ||
     Ezio Tinkerer Username: Ezio Post Number: 16 Registered: 09-2006 Rating: N/A |
If you look at the lens breech mount without a lens, you will notice a small pin protruding from a hole in the left/lower part of the ring. That pin engages into the lens' mount, and perform two functions: the first few mm of the pin being pressed down by the lens determines the automatic framelines (you can see this by gently pressing down the pin by hand, of course without a lens); further pressure establishes the connection between the lens and the rangefinder. Rick Oleson has a very clear diagram of the whole thing. Clearly, the framelines are determined by very slight differences in the part of the lens mount that presses against the pin (it looks like a curved groove or recessed section, for lack of a better term). |