Canon 28mm f/1.8 vs. Sigma 30mm f/1.4 ? Hi, I'm thinking of getting either the Canon 28mm/1.8 or the Sigma 30mm/1.4 lens as a nearly normal/standard prime lens for my T1i (APS-C / 1.6 crop factor). I'm looking for a fast prime to use as my default lens -- I have the Canon 50mm/1.8 right now, and like it a lot, but it's a bit too tele sometimes.
The focal lengths are close enough that it looks like a wash there -- both are just a bit wider than the 35mm-equivalent 50mm focal length. The Sigma obviously is a half stop faster, and seems to be a bit cheaper. On the other hand I've read about issues with the Sigma quality, and also the Sigma seems to have issues with image quality in the corners even on crop bodies.
J. ONeill says: Did you make a decision? I am currently debating the same two lenses. I am leaning towards the Canon since it seems there are quite a few quality/AF issues with the Sigma. Any advice is appreciated.
If you own a camera with micro focus adjustment like the 50D or 7D, Sigmas front or back focusing is a non-issue. Also, even if you don't own a camera with micro focus adjustment, if you get a Sigma lens that front or back focuses, you can send it to Sigma for calibration.
I almost decided in favor of Sigma, but then I realized that Sigma is made for a crop camera only. While I'm not looking to buy an FF one any time soon, when I do, it will be costly, so I wouldn't have the money to follow it up with expensive lenses, not to mention that a good prime is a good prime, which I expect to last me a long while... So that is becoming a big drawback for me...
Coming from someone who started on a t3i and has now upgraded to a Mark ii.
I have owned the sigma for 10 months now and have rented the 28mm quite a few times. They are both good lenses although no where near L series quality. I shoot both video and do photography. As far as build quality the Sigma wins hands down. But I like the focusing on the 28mm a little better. I haven't had a lot of issues but I've gotten back from a few sessions and was dissapointed with the sigma. The focus ring is a little stiff on the sigma and a little too quick on the canon unlike a ziess or L series lens.
I am now about to sell my Sigma 30mm not because I don't like it but I need something that can be a medium focal length on a crop and a wide on a full frame. Thats where the sigma looses and also why I am now selling.
One great advantage that the Sigma has is the 1.4 Fstop. When used at 1.8 it's very sharp, you'll need to move the canon up to a f/2 for similar sharpness. For shooting a reception at a wedding F/2 doesn't quite cut it sometimes.
I don't think worrying about the fact that the Sigma won't work on a full frame body makes much sense. After all, on a FF body you would want something like the Canon 50/1.4 instead. A 30mm lens on a FF body would be like a 18mm lens on a crop body -- and I don't find myself wishing for an 18mm prime on my T1i.
Even if you do upgrade to an FF body someday, you're pretty likely to keep your crop body, and so the Sigma would still be useful there.
I haven't tried the 28mm, but I can see it costs about $100 more than the Sigma. I just bought the Siggy and I love it. I have not had any focus issues and it is quite sharp wide open for my purposes (low-light indoor shots of food and people).
This is no easy call. Both lenses are said to perform similarly in terms of IQ. I've owned the EF 28mm f/1.8 and was never happy with it due to innacuracy of AF and image softness. Some folks like it quite a bit. Not my case. I wouldn't recommend this lens. I've read good reviews about the Sigma 30 mm, but I lack first hand experience. My two cents worth...