■ MODEL/OPTICS *J8901/0.5"optics : High resolution 100 pitch screw 2 point tilt *J8902/ 1" optics : Compact robust design *J8903/1.5"optics : Azimuth - 8°range *J8904/ 2"optics : No backlash *J8905/2.5"optics : Option : 3 point tilt
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