[Guest]

Sigma 30 f/1.4 (Art) AF was not consistent (sometimes front, sometimes OK, sometimes back) on my 70D but acceptable on my 6D. Weird but true. Since 30 f/1.4 is a DC lens designed for APS-C, it makes little sense for me to keep it.

 

My new 35 f/2 IS works perfectly on both cameras. Consistent and needs zero adjustment.