Originally Posted by
Discus-n00b
The 24 1.4 (The one mainly talked about at least) is from Canon, its actually II now as its the second generation. Its one of those fancy red ring primes. Sigma makes a 30, 25, 50 1.4 ART. They also make a few non ART lenses close. 24 1.8 (and a few 30 or 35mm 1.4), as well as a 20mm 1.8. I might do some reading up on it. Usually Sigma is fairly close to the others quality wise just cheaper. The Sigma 1.8 is actually about $1000 cheaper MSRP. I'm not very close to buying right now so I have some time to shop around and compare.
The "offbrand" Samyang 24mm 1.4 is supposedly VERY impressive and very close to the Canon. Like the Sigma, about $1000 cheaper too. Samyang, Rokinon, and Pro-Optic are all basically the same brand, I own their 14mm 2.8 and really like it.