Wanted to know if anyone has used Sigma 20mm 1.4 with Canon mount and what your thoughts are? I am looking for something that wide or wider around $500 range (less if used) that is less than f1.8
I own the 20mm 1.8 and use it on my Canon 5D Mark II.
I'd rate the lens a 7/10. I don't use it a lot, especially not for film since the ultra-wide nature makes it unnatural looking (but hey, you might have a point to use it because of that very feature).
I've shot a tiny bit of landscape and model photography on it, samples: