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Lens
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A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists
A burning apparatus consisting of two biconvex lenses
A burning apparatus consisting of two biconvex lenses
Light being refracted by a spherical glass container full of water; Roger Bacon, 13th century
Light being refracted by a spherical glass container full of water; Roger Bacon, 13th century
Lens for LSST, a sky surveying telescope which had its first light on 23 June 2025
Lens for LSST, a sky surveying telescope which had its first light on 23 June 2025
Real image of a lamp is projected onto a screen (inverted). Reflections of the lamp from both surfaces of the biconvex lens are visible.
Real image of a lamp is projected onto a screen (inverted). Reflections of the lamp from both surfaces of the biconvex lens are visible.
Camera lens
Videos
A camera lens, photographic lens or photographic objective is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographi
Lens
…angular) size of a distant object to the size of the real image produced at the focus. The plate scale is the reciprocal of the focal length of the camera lens; lenses are categorized as long-focus lenses or wide-angle lenses according to their focal lengths. Using an inappropriate measurement of magnification…
Different kinds of camera lenses, including wide angle, telephoto and speciality
Different kinds of camera lenses, including wide angle, telephoto and speciality
The zoom lens assembly of the Canon Elph
The zoom lens assembly of the Canon Elph
Apertures in 1-stop increments on the same lens.
Apertures in 1-stop increments on the same lens.
How focal length affects photograph composition: adjusting the camera's distance from the main subject while changing focal length, the main subject c
How focal length affects photograph composition: adjusting the camera's distance from the main subject while changing focal length, the main subject can remain the same size, while the other at a different distance changes size.