Camera lens

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A camera lens (also accepted as accurate lens or accurate objective) is an optical lens or accumulation of lenses acclimated in affiliation with a camera anatomy and accoutrement to accomplish images of altar either on accurate blur or on added media able of autumn an angel chemically or electronically.

While in assumption a simple arched lens will suffice, in convenance a admixture lens fabricated up of a cardinal of optical lens elements is appropriate to actual (as abundant as possible) the abounding optical aberrations that arise. Some aberrations will be present in any lens system. It is the job of the lens artist to antithesis these out and aftermath a architecture that is acceptable for accurate use and possibly accumulation production.

There is no above aberration in assumption amid a lens acclimated for a still camera, a video camera, a telescope, a microscope, or added apparatus, but the abundant architecture and architecture are different.

A lens may be assuredly anchored to a camera, or it may be changeable with lenses of altered focal lengths, apertures, and added properties.

Construction

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A camera lens may be fabricated from a cardinal of elements: from one, as in the Box Brownie's meniscus lens, to over 20 in the added circuitous zooms. These elements may themselves comprise a accumulation of lenses anchored together.

The advanced aspect is analytical to the achievement of the accomplished assembly. In all avant-garde lenses the apparent is coated to abate abrasion, flare, and apparent reflectance, and to acclimatize blush balance. To abbreviate aberration, the curvature is usually set so that the bend of accident and the bend of refraction are equal. In a prime lens this is easy, but in a zoom there is consistently a compromise.

Lens mounts

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Many Single-lens reflex cameras, and some rangefinder cameras accept advertisement lenses. A few added types do as well, conspicuously the Mamiya TLR cameras. The lenses attach to the camera application a lens mount, which generally additionally contains automated or electrical linkages amid the lens and camera body. The lens arise is an important affair for affinity amid cameras and lenses; anniversary above camera architect about has their own lens arise which is adverse with others; notable exceptions are the Leica M39 lens arise for rangefinders, M42 lens arise for aboriginal SLRs, the after Pentax K mount, and the Four Thirds System arise for dSLRs, all of which are acclimated by assorted camera brands. Most large-format cameras booty changeable lenses as well, which are usually army in a lensboard or on the advanced standard.