SLR Gear Sigma 50/1.4 Art series test.
Looks good and better than Nikon's 50 and 58 f/1.4s, as well as Canon's 50/1.2.
The Sigma is certain to be more expensive than Nikon's 50/1.4(again)
The sharpness graph(blur index) looks to be about the same as Sigma's 35/1.4, so if sharpness is everything to you, this lens ought to be acceptable.
I doubt it'll match or even come close to the Otus in any way tho.
From what we've been reading/seeing it'll be good, and it'll be the best 50mm lens made!
I'm thinking of updating my current Sigma 50/1.4 with this one.