815.500 in. Lg; magnification 30.0x at infinity; erected image; coated optics; aperature 1.340 in.; resolution 3.9 sec; reticle is glass w/filar-bifilar pattern; focus range 0.0 to infinity; barrel 11.125 in.Lg, steel w/hard chrome finish; micrometer integrally mounted in barrel, range porm 0.050 in. In increments of 0.001 in.; auto-reflection target, paired line w/cross in ctr, 3 spaces between lines for distance up to 100 ft, illuminated from auto-collimation light; w/fiberglass case, 3121-g1; wt 18.0 lbs