I live in the California desert. Generally, my choices are: take pictures with lots of sand and/or pictures with lots of sky. We don't have that many pretty little flowers to use our macro lenses on. Besides, we have Africanized Killer Bees around here competing for those precious few flowers.
Today I was taking pictures with lots of sky using my 17-40L with a Hoya circular polarizer. Upon reviewing the images, I observed that sky was darkened by the filter as expected, but portions of the sky (particularly in the corners of the image) were much darker than others. Is this a common problem with circular polarizers, or is it an anomoly inflicted on just me?
Is that more pronounced with wide-angle lenses? Is the only solution to use less polarizing effect? If so, is there another way to crank up contrast (besides post-processing)?
By the way, This forum is wonderful. I've learned a great deal.