Apochromatic

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Apochromatic (APO lens) Lens corrected for chromatic aberrations in all three primary colours. Many manufactures use different names (i.e. NIKON use ED) ...

Apochromatic Lens - A specialty lens that focuses all light colors at the same point. APS - See "Advanced Photo System." Artifacts - Visual defects found in digital images.

APOCHROMATIC - often shortened to APO, means corrected for spherical and chromatic aberration. Lenses that are apochromatic cause all visible light wavelengths to focus on the film plane.

Apochromatic. Having the ability to bring all colours of the visible spectrum to a common plane of focus, within close tolerances, usually refer to a lens with such superior colour correction. Also refer to "ED", "LD", "SD", "UD". Aperture ...

Apochromatic The inability to bring light of all colours to the same plane of focus is known as chromatic aberration. Light refraction is a function of wavelength, and as such each colour is normally brought to as lightly different plane of focus.

Apochromatic (APO). Also "apochromat." A lens designed to minimize chromatic aberration by bringing three wavelengths of light onto the focal plane.

apochromatic lens a process lens that has been corrected for both chromatic and spherical aberrations. apparent dot area percentage of dot coverage in a specific area, as measured using a densitometer and calculated using the Murray-Davies equation.

"Apochromatic" Elements "APO" elements (UD, SUD, CaF2, LD, SLD, ED etc.) improve contrast and sharpness by reducing chromatic aberration (color defects) that usually occur in tele lenses.

Most apochromatic ('APO') lenses do not have an Infrared index mark and do not need to be refocused for the infrared spectrum because they are already optically corrected into the near-infrared spectrum.

APO (Apochromatic) - the ability to bring all colors of the visible spectrum to a common plane of focus, within close tolerances. It usually refers to a lens with such superior color correction.

Achromatic / Apochromatic Doublets Special lens systems (achromatic or apochromatic doublets) using two or more pieces of glass with different refractive indexes can reduce or eliminate this problem.

Apochromatic; a type of lens which focuses different wavelengths of light on the filmplane for improved image sharpness. Especially useful in telephoto lenses. (Chromatic aberration is corrected). Top of Page ASA ...

Fluorite lenses are semi-apochromatic, meaning their degree of correction lies between the achromatic and apochromatic.

8 EX APO IF HSM lens features an apochromatic optical design and four elements composed of Special Low Dispersion (SLD) glass for high image contrast, resolution and color saturation.

When looking for the proper spotting scope for your digital camera, consider choosing a scope that contains any or all of the following features: high definition (HD), apochromatic (APO) glass (glass that has been cleared of color and shape ...

I purchased the Mamiya 5x apochromatic loupe - 3 elements in 3 groups. It comes supplied with a translucent and an opaque skirt and allows for diopter correction. It is an attractive shade of grey, much like titanium.

Lens designs which are projecting blue and green light focused unified are called achromatic lenses. When the focusing correction of the lens includes blue, green and red light it's an apochromatic lens design.

Achromatic lenses tend to focus blue nod red light at the same point, but not intermediate frequencies (for example, green). Where light of all colors is focused at the same point, the lens is known as an apochromatic or APO lens ...

Chromatic aberrations are reduced if special lens systems such as achromatic or apochromatic doublets are used. These use two or more pieces of glass with different reflective characteristics. Not even these are completely perfect however.

Apochromatic lenses must be used for critical work in color copying and duplication.

See also: Apochromat, Lens, Focus, Image, Camera