Re: ***USO MST-100's, LAST RUN!!!***
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: codyb</div><div class="ubbcode-body">Reset it by tightening it down or? </div></div>
Loosen the lock ring 1/4 to 1/2 turn (no more)
Turn the focus ring 1/4 turn then snug the lock ring back down.
Check for parallax. If it's still present, then repeat.
If you get to 1/2 to 3/4 turn and observe no change, then you are turning the ring the wrong way. Dial it back and start over.
Make sure you are snugging the lock ring after every adjustment otherwise the objective lens could "float".
It goes without saying that when you do this you should be on a target at your desired range. The Marine Corps suggests 300 yards for shooting to 1000 yards. If you won't be shooting that far, then set the parallax at a closer range (100-200 yards).