apochromatic

These are 6-element, 4-group apochromatic lenses with a 75 angle of coverage.

Apochromatic lenses are sometimes recommended due to their improved focusing across the spectrum.

Apochromatic lenses are designed to bring three wavelengths (typically red, green, and blue) into focus in the same plane.

In some cases, apochromatic designs without anomalous dispersion glasses are possible.

Most professional telephoto lenses since the early 1980s are apochromatic.

Apochromatic refractors have objectives built with special, extra-low dispersion materials.

This occurs most commonly with apochromatic objectives.

The sub-telescope is a 15-cm apochromatic Kepler refractor of focal length 180-cm.

Apochromatic designs require optical glasses with special dispersive properties to achieve three color crossings.

Classically-designed apochromatic process camera lenses generally have a maximum aperture limited to about 9 .

These are perfect apochromatic lenses.

These are apochromatic lenses with 4 elements in 4 groups and an angle of view of approximately 48 .

Midland optical department was specialized in the research of retrofocus designs and apochromatic corrections.

Minolta's converters for its Maxxum cameras feature apochromatic glass.

These are apochromatic telephoto lenses using a 5-element variation of the Tele-Xenar design.

If red, green and blue are brought to a common focus (plus other aberration corrections) with very little residual aberration, the lens is called apochromatic.

Due to the special materials needed in the fabrication, apochromatic refractors are usually more expensive than telescopes of other types with a comparable aperture.

Subsequently the new glasses would demonstrate their value in correcting astigmatism, and in the production of apochromatic lenses.

These are 6-element, 4-group apochromatic enlarger lenses, using high-modulation glass elements, designed for critical color rendition and precision industrial applications.

Monocrystals of fluorite are sometimes used in the objective lenses of apochromatic refracting telescopes.

More common configurations use three or more elements, for achromatic correction or apochromatic correction and higher image quality.

Apo-Artar lenses are an apochromatic symmetrical 4-element design, which is optimized for 1:1 reproduction.

These are Barrel lens for Enlarging & for a photoengraving, and perfect apochromatic lenses.

This new type of glass made possible a new class of microscope objective, the apochromatic (often abbreviated 'apo').

By combining more than two lenses of different composition, the degree of correction can be further increased, as seen in an apochromatic lens or apochromat.