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I need a wide angle... here are my selections to choose from.
Canon 10-22 3.5-5.6f USM ~$749.99
Sigma 10-20 4-5.6f ~$459.99
Which one and why?
And what exactly does USM (Ultra Sonic Motor) mean in reference to Canon glass? I am ASSUMING that it has something to do with the autofocus motor.
Canon 10-22 3.5-5.6f USM ~$749.99
Sigma 10-20 4-5.6f ~$459.99
Which one and why?
And what exactly does USM (Ultra Sonic Motor) mean in reference to Canon glass? I am ASSUMING that it has something to do with the autofocus motor.