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Anonymous
You need a thin polarizer (instead of two filters wide, the polarizer needs to be one filter wide) or you will cause extra vignetting. Of course, thin polarizers are more expensive.
In any case, the 10-22mm is L lens glass shoved into a EF-S package and a so-so plastic casing, so it deserves the best you can afford. If you want to use a polarizer, get a multi-coated one, preferably at least Hoya SMC but B+W is recommended.
See here: http://www.bhphotovideo.com/c/product/133012-REG/B_W_65016930_77_mm_Circular_Polarizer.html
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