I recently upgraded from a point and shoot Canon Powershot SX130IS to a Canon EOS 6D. I am enjoying my new camera immensely, but I have a problem with a circular polarizer filter. I bought the 24-105mm kit lens that Canon pushes with this camera and the vivitar circular polarizer included in the kit gives me spotty results. I used to shoot 35 mm film and medium format film back in the 60's, 70's, and 80's and I do not remember ever having a problem like this with polarizers. This picture was taken at the 24mm setting, it is somewhat less ugly at 105mm, but it is still there.

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