On: Canon EF and RF Lenses – All Autofocus Motors

[tjr]

My dog also developed an aversion to cameras, and I wondered if it was the USM focusing. That might have been what started it, but she still doesn't like any cameras at all, USM or not.

[lambdasquirrel → tjr]

Maybe the mechanical/EFCS shutter?

Some animals just know and some like being the center of such attention. Others just don’t.