A question came up in the Sigma 10-20 group about circular polarizer filter (CPL) thicknesses and there vignetting effects. Since I have (was told I needed the thin one) for this lens and I had just recently purchased the same 77mm CPL in normal thickness I thought I would do a quick test.
Below are 3 photos I took with no CPL, thin one and thick one. While not a great consistent background, shooting at 10mm requires a lot of scene, it was hard to find anything better this evening. I might retake some photos on a clearer day when I can get into a more open area.
Sorry, I didn't drag out the tripod. Exposure for the CPL shots was set to the same as the non CPL shot. I let you judge for yourself the results but it appears thick CPLs are just fine.
I'm still figuring out this blog stuff so please pardon my ignorance on posting photos in the blog.
No polarizer
100$+ Tiffen Thin Polarizer
29$ Sunpak Thick Polarizer
Thursday, August 14, 2008
Wide Angle Lens Polarizer Thickness
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