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.
Angle of view of the diagonal about 50° and a focal length approximately equal to the image diagonal.
Any lens with a focal length longer than the diagonal measure of the film or sensor. Angle of view is narrower.
Designed to capture images rich in perspective, this ultra wide-angle lens with its extreme angle of view is the ideal choice.
One of the most popular cameras with which many have learned the basics of photography.
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