apochromat

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apochromat

[‚ap·ə′krō·mat]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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DETAILS: Stellarvue SV70T apochromatic refractor with ZWO AS1I600MM Pro CMOS camera.
These special apochromatic lenses correct specifically for color and dramatically reduce chromatic aberration.
Fluorite, ED (extra-low dispersion), or APO (apochromatic) glass will cost you a couple of hundred dollars extra.
Just for this experiment, the manufacturers graciously loaned me a Tele Vue-NP101is apochromatic refractor, a Finger Lakes ML-8051 CCD camera, and a Bisque MyT Paramount field tripod.
It also features a triple apochromatic lens system, which reduces fringing, dilution of color fidelity, and degradation of resolution.
b) A tracking equatorial mount with a Canon 500D camera attached to a Megrez 72mm apochromatic refractor with a x2 converter for a total focal length around 900mm.
This is one area in which high-quality apochromatic (free from color error) refractors excel.
The sweet spot in the middle belongs to brands like Sightron and Pentax, which combine multicoated aspherical lens technology with apochromatic glass, magnesium bodies and p-coat prisms for an exceptional quality-to-cost ratio.