1. What is the reference point for the distance markings? The film plane or the lens mount?
2. Where should I line up the markings for checking rangefinder alignment? I.e., is it the leading edge of the number? The middle?
I'm confused because on my 50mm Summilux E43 (1 meter minimum) when I set the focus ring all the way to the near focus stop it moves past the "1" on the focus scale but the distance to the film plane seems to be 1 meter and the rangefinder lines up perfectly. When I place the camera by measuring 1 meter from the subject to the lens mount and align the rangefinder it ends up being exactly on the "1". ??