Jacob D Offline Upload & Sell: Off
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kakomu wrote:
It's at times like this that one must question whether they do, in fact, need 17mm.
I'd really like something wider than 20mm for the UWA look that it gives to landscape. I've read a little about the Sigma 12-24 and it sounds tempting but I like the Canon (17-40L) better for it's overall range. I think it may give me the UWA I'm looking for and double as a wide-to-standard zoom on an eventual crop body.
If I thought I could be happy with 20mm... I would force myself to save some pennies and compromise with the 24L II 
coincidentally the angle of view of each of the lenses differs by about 10 degrees...
17-40 @ 17mm = 104*
20-35 @ 20mm = 94*
24mm = 84*
the sigma is a big jump... @12mm = 122*
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