Thread: Parallax adjustment or no parallax adjustment

For the above mentioned S&B the calculated maximum parallax error with the shooters eye offset to the edge of the exit pupil for a 600m target is 25mm, and 125mm ( 0.7moa ! ) for the Leica. The difference is because the S&B is focused for 300m, the Leica at 100m. For a 1mm offset in the eye position off the optical axis at max power (12x) the reticle moves 12mm and 60mm against the target respectively. In my opinion Leica really should reset the focus from 100m to 300m for the 3-12x50 variant with target turrets (or better still retain the focus adjustment).

60mm is getting up towards 0.5moa error at 600m. That is for the eye just 1mm off axis. Does this mean the search for accuracy in the load and rifle is questionable with a scope like this ? These figures still don't give an indication as to how parallax is experienced at a practical level. Maybe getting the eye exactly in line consistently is easy ? I've never really given it much thought having had focus adjustments, but I'm now looking at scopes without.