yep, Sigma Art AF consistency on 6D is nearly spot on. I moved on to 5D III and subsequently to 5D IV and that's when the fan began
If you intended to keep shooting with your 6D forever, then you may be just found the sweet spot.
short term vs mid to long term approach.
I am going to shoot with 5D IV for next 4 years at least and not looking to upgrade my Canon L-trinity of lenses. they are that good. Canon 16-35 F2.8 iii L is crazy sharp at 35 mm. it is so sharp it is ridiculous.
I decided to sell Sigma Art lenses while I can and am doing this with a very minor discounting if at all. Mid to long term I am better of with Canon lenses.
jd7 said:
.... I am pretty happy with the AF on my 35 Art, 50 Art and 85 EX on my 6D, and I am not too worried about in camera JPGs, so I will persist with the Sigma lenses on a Canon body.