Vari-Focal Lenses
A varifocal is a lens with variable focal length in which the focus changes as focal length (and magnification) changes, requiring the lens to be refocused, as compared to parfocal zoom lenses which remain in focus as the lens zooms (both the focal length and magnification change). Many so-called "zoom" lenses, particularly in the case of fixed lens cameras, are actually varifocal lenses.



†= Tamron lens. Other lens manufacturers' offerings are also avialable.

A GMMPZ4411MCN • 4.4-11mm • f/1.6

B GMMPZ1040MCN • 10-40mm • f/1.6

C GMMPZ1664MCN • 16-64mm • f/1.8

Lens Information:
Magnification Calculator
Focal Length Calculator
Glossary, Technical Notes