Cpl Filter Canon

Cpl Filter Canon
cpl that filter should I use for the Canon EF 17-40mm f/4.0 L lens?

I am thinking of hoya 77 mm but not sure if I really need to spend extra money on the thin one because I have a Canon 20D instead of a full frame camera. Hoya 77mm CPL would be-0042 be good enough?

There are a couple of reasons why not I get the thin assembly, the first charge, then, is the cultivation of the 20D, I would not have bullets in all – 1.6 x 17 mm is not enough broad to worry. And you can not use a lens cap with the thin frame CPL.

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