Sigma 30mm f1.4 vs Canon 28mm f1.8

[Davidhm]

I am trying to decide which one of the two is the best for me. I have a 30d and am looking for a fast lens for wedding, party and outdoor night stuff. The Sigma is 62 m and the Canon is 58m which fits all the filters and other stuff I use. If I got the Sigma i would need to purchase some key filters. I have the Canon 85mm 1.8.
Any comments, advice or concerns?
David

[cyclohexane]

For your kit I'd go with the Canon 28mm f/1.8, as it shares your filters and other stuff.* It can also be used with film or 24x36mm full frame cameras, unlike the Sigma.* The Sigma is fairly good optically, but quality control has been said to be wanting.* I've heard of nasty corners on many copies of the Sigma.

[Sidebyte]

Because of the great high ISO performance of the 30D, you can afford the one stop and still have the utility of using your existing accesories..

[jfrancho]

It's a 2/3 stop difference. I have the 28mm lens and it's a real workhorse. Get the hood for it as the whole front of the lens is glass -- it likes to flare up.

[lmitch6]

I also own the 28 f/1.8, and it is my workhorse lens, along with the 20mm f/2.8. I can't recommend it enough. As jfrancho said, definitely get the hood for it, it's worth it!

[nadtz]

The accessories are a valid point, as are potential problems with focus issues with the Sigma. But having used canon's 35/2 28/1.8 and the sigma 30, well, the sigma is the only one I still have, and I am very happy with it. BUt if I had filters and what not that I could use interchangeably, Id probably go for the 28.