ARMY TM 9-1290-262-24&P
MARINE CORPS TM 00476C-24&P
AIR FORCE TO 49A7-3-72/74
4-4. TEST AND ADJUSTMENT PROCEDURES (cont).
DEFINITION
1
Look into dioptometer eyepiece and turn eyepiece until reticle is in sharpest focus.
Look at a target 45 inches away. Slide objective lens in or out to bring target in sharpest focus.
2
Hold dioptometer up to aiming circle eyepiece and check that collimator definition lines are in
3
sharp focus. If the lines are in sharp focus, remove dioptometer and proceed to the next
adjustment procedure. If lines are not in sharp focus, proceed with steps 4 thru 9.
Recheck eyepiece focus. Refer to page 4-23.
4
Recheck parallax of objective assembly. Refer to page 4-24.
5
Check prism installation. Refer to page 4-12.
6
If definition is still poor, replace prism. Refer to page 4-12.
7
Recheck parallax of objective assembly. Refer to page 4-24.
8
Repeat steps 1 thru 3.
9
