Quote Originally Posted by chrism View Post
I have always been under the impression that it was autofocus and not the meter that had problems with linear polarizers, hence the reason older manual focus cameras are fine with the linear variety.
It wouldn't surprise me if there are auto-focus systems that are affected by polarizers. My personal knowledge is based on somewhat dated experience - I worked as a camera salesperson in the 1970s and early 1980s. At that (pre-autofocus) time there were some systems whose metering systems required circular polarizers (Canon and Leica SLRs spring to mind, IIRC) while others didn't.

Since then, I haven't had reason to keep track of the issue, because it never has been an issue with my 35mm equipment (Olympus OM - no autofocus) and my medium format equipment isn't autofocus and, with the exception of one metering finder, is also without meters.