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Glossary of Terms (2)

A regularly updated collection of terms, definitions, abbreviations and acronyms related to photographic lenses. You must be logged in to add a term.

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AF stand for Auto-focus and it is printed on lens barrel. It describes lens capability to work with camera body to achieve focus automatically. Details about AF systems and how they work can be found here.

Source: Wikipedia Auto-focus
Posted by: Radovan 24.03.2013 19:07:53


APO is acronym for Apochromatic used by Sigma to denote that lens has been made using special low-dispersion (SLD) glass and is designed to minimize color aberration. Usually contained in lens name eg. (150mm F2.8 EX DG OS HSM APO Macro) 

Source: Sigma product description
Posted by: Radovan 24.02.2013 19:46:51

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