Sigma 50-100mm f/1.8

[Vertigo]

http://petapixel.com/2016/02/19/sigma-unveil-crazy-fast-50-100mm-f1-8-art-lens/

Woah, this could be very interesting!

EDIT: Hmm, just noticed the "DC" part - that's crop only isn't it?

 

[Vertigo]

I already own the 18-35mm and I've been looking to get something in my 35mm to 100mm gap (next lens is the EF 100mm F2.8L)

If this is as sharp (or better) than the 18-35mm then it won't be cheap... Focusing needs to be better though.

Focusing is Sigma's last remaining weak spot. Unfortunately I don't think it'll ever improve as the third-party manufacturers are forced to try to reverse engineer Canon's AF protocols and will never do as good a job as Canon themselves.