Lenses

Lenses

A lens is an optical device which is capable of transmitting and refracting light.

Industry: Photography

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Lenses

Single-lens-reflex (slr) camera

Photography; Lenses

Light entering the camera through the lens is reflected up by a mirror behind the lens onto a ground glass screen above. This screen is viewed through the viewfinder and a glass pentaprism which ...

Converter lens

Photography; Lenses

A device that attaches to the camera lens, changing the focal length.

Bellows focusing attachment

Photography; Lenses

A pleated expandable attachment placed between the camera and a lens to allow the lens to be moved with respect to the focal plane.

Bayonet mount

Photography; Lenses

A type of mount for removable lenses. Three to four projections on the lens are inserted into matching slots in the camera lens mount and the lens is rotated to be locked into place.

Fixed aperture

Photography; Lenses

An option that allows the user to choose whether or not aperture is automatically adjusted when the lens is zoomed in or out.

Of lens assemblies: Of the type used in telescopes, consisting of a convex front element and followed by a concave telephoto group. The optical centre is in front of the lens assembly, placing the ...