Originally posted by philbaum That dang Sigma 30 f1.4 thread drives me crazy with their good pics. But i've often thought i'd prefer buying the 24mm f1.8 for the money. Any pics or comments you would care to share about the Sigma 24 f1.8???
Well, originally I bought the Sigma 30mm to take available light pictures at parties and also for some portraits. But the 30mm is really a bit too long for the party shots I wanted. Conversely, it's a bit too wide for the portraits I wanted to take. Once I got the Sigma 24mm F/1.8, I used that for available light pics at parties. That or use a bounce flash and my Tamron 17-50mm F/2.8. And for portraits I have a Pentax-F 50mm 1.4 and also a K 50mm 1.2 to get really crazy with bokeh. So I guess if you're going to get one fast lens that you'll use for multiple purposes, it's a great lens. But I don't know what single purpose it would be the best lens for. That's why I almost never use it.
If you're going to buy one, be aware that the center sharpness is nothing short of amazing, but the border and corner sharpness are quite low.
The Sigma 24mm F/1.8 is a great lens. Not as crazy sharp as the 30mm, but for me it's a much more useful focal length. The lens is quite big and heavy though, making it less appealing for a walkaround lens. Also, the weird manual/auto focus switching on the lens doesn't make much sense when you have a manual/auto switch on the camera.