Polarizer for Zeiss 15mm f/2.8 ZF.2 lens.

As soon as you mention an UWA lens and polarizer in the same sentence, you'll be told you shouldn't use one.  If an expanse of blue sky is in the shot, then this is generally good advice.  I use polarizers though when shooting waterfalls on cloudy days and find them indispensible.

I'd love to have the Zeiss polarizer, but opted for the Marumi for the 15mm...it's very hard to beat for the money.  I could post a sample or two, but they'd be from the ZE mount version.

-Tim