TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 91240-400-34&P 3-12. FINAL INSPECTION INSTRUCTIONS (CONT). PARALLAX INSPECTION AND ADJUSTMENT 1 Set parallax distance to 250 ± 10 meters on collimator projector (1) by rotating objective end (2). 2 Remove setscrew (3). 3 Look through M139 elbow telescope (4). Screw objective cell assembly (5) in or out until parallax is 0.1 mil or less in the center of the field of view. 4 Install setscrew (3). RETICLE PLUMB/COLLIMATION INSPECTION AND ADJUSTMENT 1 Set parallax distance to 250 + 10 meters on collimator projector (1) by rotating objective end (2). 2 Remove one of four setscrews (3) securing reticle. 3-24