[glenerrolrd]

Rob/Mark They are taking care of the lenses and that is not an issue . I expect that the M8 and future versions will be my primary system....and I am convinced that periodic calibration will be required (if for no other reason than my lenses will change). My interest is in better understanding how the collimation test fits in (is it really telling us anything different from the "star test" using the body ). The difference would appear to be that on the M8 testing always has some "maybe small" variance due to the range finder. The second question is surely at somepoint subjective....Marks analysis would indicate that if you have acceptable results at 200 yards then infinity should be acceptable (if not perfect). At the shorter distances ..I do as quick test on a wall chart....if the lens backfocuses(wide open) by more than 6 inches at 2M , I know it will show up in my images. The infinity test, other than being an important baseline, is more difficult for me to evaluate (how it impacts image quality). . Now a casual reader may ask.....who cares? But if you follow sean reid s testing of the rangefinder lenses..you can see that his testing methodology includes taking multiple images and picking the best This is to avoid the small focusing errors made by the user. These errors may be large enough to make the differences in sharpness(between your lens choices) irrelevant in practical photography. So you could argue that having a calibrated system is as important as buying the best glass. Since almost every lens in the M system is pretty darn good.