Sorry if this has been addressed before but I've had the Sigma for a little bit and I'm generally pleased with the Sigma's performance. It seems soft but useable wide open but the AF seems inconsistent. I also use my primes for landscape work and the Sigma never seems to be as sharp as my Canon 50mm 1.4. I was wondering how the Canon 24mm 1.4 fares in terms of sharpness and AF. Price difference is not that big of a consideration, I'm just wondering whether there is a noticeable difference between the two.

