Whether it is employed in complex, multi-instrument setups or simply holding a reference line, the 81 is an economical and reliable optical alignment instrument. This scope is well-suited to applications not requiring micrometer measurements.
81 Specifications
Telescope:
Length: 14 inches
Magnification: 20X at 2 inches from objective; 30X at infinity
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
Focusing Knobs: Located 5 inches from objective end of barrel
Approximate Weight: Instrument, 9 pounds; instrument and case, 26 pounds; shipping, 27 pounds
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