Ultra wide angle lens

Ultra wide angle lens

A wide-angle lens is a lens whose focal length is shorter than the short side of film or sensor.
* For APS-C any lens shorter than 15 mm is considered ultra wide angle.
* For 35 mm film of full-frame sensor any lens shorter than 24 mm
* For 6x45 any lens shorter than 41 mm
* For 6x6 and 6x7 any lens shorter than 56 mm

Some common effects with ultra wide optics

Not need to focus

Enough light

Don't avoid Sun in view

Sky. Polaroid and gradient filters

Fish-eye

No-distortion-lenses

History

The most old "lenses", pinholes, keep perspective accurately.

Modern times

External links

* http://www.canon.com/camera-museum/camera/lens/ef/ultra_wide.html


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