Hi Kevin,

Good points on step-up rings, they can help trim the filter budget for sure. They're also a good scheme for getting a filter on certain very wide angle lenses w/o vignetting in the corners. My only caveat is they're hard to couple with lens hoods.

I may have misled with the my note on multicoated CP filters. Plain, uncoated CP filters pose no technical problems to autofocus or metering as far as I know. I think I spend too much time on photo lists where folks won't tolerate anything less :-)

That said, if you want a scare, price a couple of Kasemann coated CPs. (For the record I own zero of them, but would like a 72mm someday if I can find a co-signer.)

Originally Posted By kevonionia
Paul & Rick:

(Rick, can you explain a little more about these expensive multi-coated polarizers? A regular circular polarizer (a non-linear polarizer) won't do? I'm not getting it.)
_________________________
--Rick