An apochromat, or apochromatic lens (apo), is a photographic or other lens that has better correction of chromatic and spherical aberration than the much...

be further increased, as seen in an apochromatic lens or apochromat. "Achromat" and "apochromat" refer to the type of correction (2 or 3 wavelengths correctly...

semi-apochromat objectives deal with color better than achromatic objectives. To reduce aberration even further, more complex designs such as apochromat and...

accumulation on the lungs Apo (drink), an alcoholic beverage of Northeast India Apochromat, a type of photographic or other lens Apoprotein (disambiguation), a protein...

was an important step in the development of the optical microscope. An apochromat is a lens or lens system with even better chromatic aberration correction...

to make and sell achromatic doublets. Dollond's son Peter invented the apochromat, an improvement on the achromat, in 1763. Several different types of achromat...

a combination of two or three aperture sized lenses (see achromat and apochromat for more details). The cost of such systems therefore scales significantly...

Nikkor-M 200mmF8 Nikkor-M 300mmF9 Nikkor-M 450mmF9 8-element, 4-group true Apochromat macro lens series, optimized for 1:1 reproduction. Nikkor-AM*ED 120mmF5...

achromatic, achromatism, achromatopsia, achromatopsic, amphichroic, apochromat, auxochrome, chroma, chromatic, chromatid, chromatophore, chrome, chromium...

lenses may also have the focus, iris, and other functions motorized. Apochromat (apo) lenses have added correction for chromatic aberration. Process lenses...

known for his successful optics business, and for the invention of the apochromat. Dollond was born in Kensington. Working together with his father and...

Dobsonian telescopes in 2000, followed by Maksutov–Cassegrains in 2001, and Apochromat ED-APO refracting telescopes in 2004. Sky-Watcher sells telescopes from...

Trilobites, which are now extinct, had natural doublet lenses in their eyes. Apochromats can also be made as doublets. Doublets can be air-spaced, cemented, or...

teacher in the 1970s, he developed the "HAB", an oil-spaced triplet-lens apochromat DIY-kit for amateur astronomers (Src). The asteroid's name was proposed...

achromatic, achromatism, achromatopsia, achromatopsic, amphichroic, apochromat, auxochrome, chroma, chromatic, chromatid, chromatophore, chrome, chromium...

fluorite glasses and to very tight tolerances. Photographic lens Achromat Apochromat Herzberger, M., and N. McClure, The design of superachromatic lenses,...

doublet in need of stronger curvature than, e.g., a Fraunhofer doublet Apochromat History of telescopes List of telescope types Kidger, M.J. (2002) Fundamental...

1-meter f/8 Ritchey–Chrétien reflector from DFM Engineering APM 203mm f/9 apochromat refractor from APM TOA-130 130mm refractor from Takahashi FSQ 106 106mm...

in characterizing a system's chromaticity (such as in the design of apochromats), the full dispersion relation (refractive index as a function of wavelength)...

telephoto lenses since the early 1980s are apochromatic. Note, better-than-apochromat lenses are available for scientific/military/industrial work. The quintessential...

stands in the eleven-meter dome, the 6-inch double refractor (Zeiss-B Apochromat + Busch) in the five-meter dome, and a 7-inch telescope on the platform...

Britain 1780–1789 Dollond Apochromatic Triplet 9.53 cm 3.75" Refractor – apochromat First apochromatic triplet England 1763 Father Noel's Gregorian reflector...

permanently damaged and replaced by an apochromat build by Lichtenknecker. Today, the dome houses a 6" apochromat and a 12.5" Cassegrain telescope. Other...

Warwickshire, England 1791–1923 Dollond Apochromatic Triplet 9.53 cm (3.75") apochromat First apochromatic triplet England 1763 Dollond Triplet for Wollaston...

8 or F1.9. It was an apochromat, and is still highly regarded as possibly the best standard lens ever offered. Other apochromats offered by Alpa included...

apochromatic refracting telescopes on plain glasses 125 and 150 mm, classical apochromats — refractors 200 mm; reflectors with aperture 65 («Alcor»), 110 («Mizar»)...

to the achromatic doublets, which converge blue and red wavelengths, apochromats converge focus of three or more wavelengths. Thoriated glass is doped...

"Smith's Illustrated Astronomy" 1848). Achromatic lens Aerial telescope Apochromat Extremely large telescope List of largest optical refracting telescopes...

although it is not certain whether or not the lenses are true achromats or apochromats. The only weakness in the Iscorama optical design appears to be the relatively...