Quote Originally Posted by summicron1 View Post
An SLR, I wager, would make both pins look sharp except for the most excellent viewing screen around (leicaflex SL2???) but the real point is that, with a wide-open lens, both pins can look sharp in the viewfinder, but the image will show a difference.

this is why a good rangefinder is better in dim light, especially with wide-angle lenses. It may not be a defect in your slr, it may just be the way the system works.
Um, you'ld lose that bet. Just tried a facsimile of that test with my FM2.

The grind though can definitely affect the brightness.