Camera lens
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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
Different kinds of camera lenses, including wide angle, telephoto and speciality
The zoom lens assembly of the Canon Elph
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 can remain the same size, while the other at a different distance changes size.
Wide-angle lens
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In photography and cinematography, a wide-angle lens is a lens covering a large angle of view. Conversely, its focal length is substantially smaller than that of a normal lens for a given film plane.
A Canon wide-angle 17-40 mm f/4 L retrofocus zoom lens