Varifocal lens: Difference between revisions
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Revision as of 16:59, 22 March 2010
A varifocal lens is a camera lens with variable focal length in which focus changes as focal length (and magnification) changes, as compared to parfocal ("true") zoom lens, which remains in focus as the lens zooms (focal length and magnification change). Many so-called "zoom" lenses, particularly in the case of fixed lens cameras, are actually varifocal lenses.[1]
References
Footnotes
- ^ Cavanagh, Roger (2003-05-29). "Parfocal Lenses". Retrieved 2007-11-18.
Notations
- "Lens Glossary". Tokina Industrial, Inc. Retrieved 2007-11-18.
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