Quote Originally Posted by NB23 View Post

Leica's shutters are inaccurate by a third of a stop here or there. Combine that with a third of a stop of inaccurate exposure reading here or there and you suddenly see yourself hitting perfect exposures more often then not. It's the devil's work I tell'ya.
So long as your exposure is off in the right direction. Shutter error is one reason why I'm so picky. The devil's work indeed.

It definitely helps to know through experience what exposure to expect from a particular camera. Almost always my Japanese SLR's were within a fifth of a stop, except at the highest speeds where some were off by a quarter to a third stop. That was borne out by tests I had done, and the higher speeds were always brought back to at least a quarter stop accuracy by the repair guy.