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

Started 4 months ago | Discussions thread
rmexpress22 Senior Member • Posts: 2,304
Re: Does Canon 6D MFA work for 35/1.4 ART?

GammyKnee wrote:

rmexpress22 wrote:

Not that all lenses have an issue, but my Sigma 35mm Art has issues on both a 5D4 and R5.

Can I ask what issues you have with the 35 Art and R5? My 50 Art performs beautifully on my R6, and 35 Art may be in my future - if I can count on it to behave as well as the 50.

It may be luck of the draw. I don't recall if I ever sent it to Sigma, but I have the dock for it with its latest firmware, etc.

The problem with my copy is that if I MFA it using the center AF points it will focus perfectly except with the outer AF points on a 5D4. If I MFA for the outer AF points, then all the other points will be out of focus. It's a very consistent shift so it's not use error. I shot regularly with a Sigma 85mm 1.4, wide open, and didn't have issues on a 6D or 5D4.

On the R5, it's a similar thing except I do the MFA in-lens with the dock. I believe I had the same issue on a M6 II, but that was with one of those focal reducers and while I'm sure that played a part, it's also consistent with the issues on the 5D4 and R5.

I'm not saying all copiers are this bad. But if I recall, the 35mm was one of the earlier Art lenses. I also have a Sigma 30mm 1.4 and although it wasn't impossible like the 35mm Art, it was inconsistent on a 6D. I haven't used it on the 5D4, or R5.

 rmexpress22's gear list:rmexpress22's gear list
Canon EOS 5D Mark IV Canon EOS M6 Canon EF-M 22mm f/2 STM Sigma 85mm F1.4 Art Canon PowerShot G16 +20 more
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