Leupold FX-3 Owner's Manual page 11

Unlike riflescopes, adjustments to the eyepiece in handgun scopes
affect the eye relief as well as the reticle focus . Turning the eye-
piece clockwise increases eye relief and turning it counterclockwise
decreases it .
CoMPLETINg THE INSTALLATIoN
1 . Without disturbing the optimal eye relief position, rotate the
scope until the elevation adjustment dial is at the top of the
scope .
2 . From a firing position, check to be sure that the vertical hair
of the reticle aligns with the vertical axis of the firearm .
Misalignment will not affect accuracy at moderate distances but
it can diminish long range accuracy .
3 . When you are satisfied, tighten the ring screws evenly
and securely .
FoCUSINg THE RETICLE
Secure the scope and firearm in a firm rest . Safely point the scope
at a light colored background object . With the scope approximately
four inches from your eye the reticle should appear sharp and crisp;
if it does not, it is necessary to adjust the focus by means of the
eye piece .
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