Term - IF (Internal Focusing)
|IF (Internal Focusing)||SWPP and BPPA Photographic Glossary|
Saturday 8th March 2014
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
SWPP & BPPA, 6 Bath St, Rhyl, LL18 3EB