Picture a lens that doesn’t use internal focusing: as the lens focuses, the front is actually getting closer or further from the subject, so it makes sense that the composition would change just slightly.

If you focus a lens from near to far and it also looks like the lens is zooming in or out a little, that’s focus breathing. That’s because the new feature works similarly to digital video stabilization and simply crops the footage to keep the focal length consistent as the focus changes.įocus breathing is the term used to describe the phenomenon where the apparent focal length changes as the lens focuses. But the update isn’t made for frustrated photographers trying to create a focus-stacked image or consistent series, it’s for video. The Canon RF 14-35mm f4 L, along with several other RF lenses, have received new firmware updates that allow focus breathing to be corrected in camera.

Several Canon RF lenses have been refreshed with new firmware, but the latest feature is for video only.

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