Ultra Wide Angle Lens
An ultra wide-angle lens is a lens whose focal length is shorter than the short side of film or sensor.
Thus the term denotes a different range of lenses, relative to the size of the sensor in the camera in question.
- For APS-C any lens shorter than 15 mm is considered ultra wide angle.
- For 35 mm film or 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
Read more about Ultra Wide Angle Lens: Development, Characteristics
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