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Does Canon 6D MFA work for 35/1.4 ART?

Started 4 months ago | Discussions thread
Arthur Stanley Jefferson Contributing Member • Posts: 809
Didn’t work for me

I had the Sigma 50 Art lens and the dock. It’s focus accuracy was unpredictable and could not be compensated for as it kept moving. It drove me insane. I returned it after a week of trying.

I did the tuning methodically with a tripod, focus target, cable release on 2 Canon 5Dmk3 bodies.

It would work for maybe half a dozen shots and then totally miss the exact same static well lit target, each time I tried defocusing first, tuned different ranges, nothing was stable.

All ten of my Canon lenses are mfa tuned to perfection and only need checking every 6 months in case they move a point in either direction.

The skeptic in me now thinks that as a Canon body can detect which lens is mounted and provide a Canon profile, perhaps it can also detect 3rd party glass and throw a random focussing spanner into its focussing algorithm.

It’s the inconsistency that is infuriating, one shot is “ oh that’s amazing” the exact same next shot is…”Why on earth did it do that?.?! nothing changed between shots.

I eventually bought the 35 F1.4L mk2….which is astonishing and my same 5D mk3 bodies focus accurately every time wide open.

Good luck

 Arthur Stanley Jefferson's gear list:Arthur Stanley Jefferson's gear list
Canon EOS 5D Mark III Canon EF 85mm F1.8 USM Canon EF 135mm F2L USM Canon EF 100mm f/2.8 Macro USM Canon EF 70-200mm F4L IS USM +4 more
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