Term - IF (Internal Focusing)
|IF (Internal Focusing)||SWPP and BPPA Photographic Glossary|
Monday 26th January 2015
IF (Internal Focusing)
The system in which only the internal lens group shifts during focusing. IF benefits include focusing without changing the physical length of a lens body, faster focusing, reduced diameter of the focusing ring, closer minimum focusing distance, and aberrations corrected throughout the entire focusing distance range.
Information provided by: SWPP BPPA
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