apochromat

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apochromat

[‚ap·ə′krō·mat]
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DETAILS: Takahashi FSQ-85ED apochromatic refractor, QS1583wsg CCD camera, andAstrodon Ha and RGB filters.
5 7x optical zoom lens features an advanced apochromatic (APO) lens design employing anomalous dispersion (AD) glass to minimize chromatic aberration at all focal lengths and produce sharp, contrasty images.
The f/8 configuration is similar, with an apochromatic Barlow in front of the secondary and additional lenses built into the drawtube, which results in a low 25% central obstruction.
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.
But it isn't just the focal length that will determine the photographer's choice of lens--other considerations include the provision of a built-in vibration reduction system to counteract camera shake; an ultrasonic lens motor to ensure that autofocus operation is silent; apochromatic lens elements for reducing optical aberrations; and a 'fast' maximum aperture.
This is one area in which high-quality apochromatic (free from color error) refractors excel.
These special apochromatic lenses correct specifically for color and dramatically reduce chromatic aberration.
The new DiMAGE Z2 is the first Konica Minolta digital camera to be equipped with the new Mega-zoom featuring the all-glass apochromatic (APO) lens.
Caption: BEAUTY WITHIN The author with his wife Asia and the premier instrument of the observatory, an attractive, Victorian-style 7-inch f/7 apochromatic refractor.
Tenders are invited for Fully Apochromatic Advanced Stereo Microscope for Dissection .
17 UT, using an Astro-Physics 160EDF apochromatic refractor + SBIG STL-11000M CCD camera + 6nm Tru-Balance H-alpha filter, reveal a near-spherical shell of gas, located within a faint H II region near NGC 6888, that was apparently not noticed (or published) previously due to the density of stars and gas in that area of Cygnus.