Glossary
 

Glossary

Breadcrumb

Glossary > IF (Internal Focus)  
IF is short for Internal Focus and is, as the name implies, a design that allows inner lens elements to focus rather than the front element being used that usually extends to adjust focus. The benefit of this type of lens is that it can be made smaller and lighter and is often easier for the camera’s autofocus motor to drive the lens group. It’s found mostly in zooms and telephotos, but they tend to be more costly than traditional exterior focusing lenses.