As our most versatile alignment scope, the model 83 incorporates two micrometers for precise measurements in two directions perpendicular to the line of sight. The telescope has built-in provisions for maintaining the line of sight straight throughtout a focusing range of tow inches to infinity, allowing the instrument to be located in the tightest of setups. Straightness is maintained at ±0.001 of an inch from two inches to 17 feet and one arcsecond from 17 feet to infinity. Model 83 is also equipped for autocollimation and auto-reflection.
83 Specifications
Telescope:
Length: 15 1/2 inches
Magnification: 20X at 2 inches from objective; 30X at infinity (45X available)
Field of View: 1 degree
Image: Erect
Optics: Low reflective, protective coating
Effective Aperture: 1.34 inches
Resolution: 3.9 arcseconds
Reticle: Glass, filar/bi-filar pattern (others available)
Focusing Range: 2 inches to infinity
Micrometer and Focusing Knobs: Located at eye end 4 1/2 inches forward of eyepiece
Approximate Weight: Instrument, 12 pounds; instrument and case, 29 pounds; shipping, 30 pounds
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