MrAdventure
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 Re: Sigma 30mm prime - not so great? | |
Ummm nooooo!!!
The Sigma 30mm is not sharper than the Canon 50mm at any comparable apertures... I\'ve had several copies of both, and tried the Sig 50mm 1.4 against the 50mm 1.4 from C. The Sig 30 is a nice lens but it\'s soft wide open. Some people say the Canon 50mm 1.4 is soft as well. I thinks that is copy dependent...mine is sharp enough and is even better from 1.6 onwards. IQ is also better than the Sig 30.
The Canon 50mm is sharp across the entire frame by 2.8...the Sig needs another two stops for it\'s corners to catch up. Not so handy for group shots where your wanting everyone crisply in focus.
Sharpness aside, the 50mm frames like 80mm on a crop body, so the 30mm would be closer to a \"normal\" focal length on the crop. That\'s pretty much as close as you can get to a normal length with a crop. Also the Sig 30mm is crop body only...so no migrating it to a FF if you have two bodies or will upgrade.
AF is similar between the two but the Sig has better build quality than the Canon. Mine is now manual focus only after a short drop out of my hand at the beach but everything else works great. AF accuracy is where your gonna get smacked. the Sigs are notorious for requiring calibration. very spotty past 10ft in my experience. If you have a newer body with micro adjust your at least halfway to sorting that out.
The Canon 35 f2 is better than the Sig 30mm...may be older design and buzzier AF, but if IQ is what counts forget the Sig on a variety of fronts.
http://www.slrgear.com/reviews/showproduct.php/product/147/cat/10
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