04-07-2017 06:16 PM
will all ef lens work on 6d?
But, just the "EF" lenses. Any Canon "EF-S" lenses will not work. Any third party lens made for Canon full frame lenses will work. But, any third party lenses made for "Canon APS-C" bodies will not work, because they would be equivalent to an EF-S lens.
04-08-2017 06:43 PM - edited 04-08-2017 06:44 PM
"... any third party lenses made for "Canon APS-C" bodies will not work,..."
This is only partly true. Some, maybe all, third party lenses will mount to an 'ef' body. They can even 'work'. Poorly but they will work.
Canon ef-s lenses will not even mount.
04-19-2019 02:10 AM - edited 04-20-2019 12:35 AM
An internal focus lens (sometimes known as IF) is a photographic lens design in which focus is shifted by moving the inner lens group or groups only, without any rotation or shifting of the front lens element. This makes it easy to use, for example, a screwed-in polarizing filter or a petal shaped lens hood upsers.
04-19-2019 09:14 AM
What are you talking about? EF is the name Canon has given to its lens mount for full-frame digital cameras - though the name is older than that - EF-S is the name of the APS-C sensor mount. It has nothing to do with "internal focus".