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| p.3 #1 · Sigma 35mm f/1.4 DG HSM - AF |
Lars Johnsson wrote:
I'm not talking about others when I reply to you. So don't try to involve others here.
1. You have been posting at least 200 post lately that only involves AF and focus issues. So it's nearly impossible not to read a few of those. And I know for sure you don't test or try your new lenses in a proper way for AF issues. You have described how you do in many posts. Handholding the camera and shooting at subjects like children or dogs. And you also say that those are perfect for testing the AF on a new...Show more →
First of all, as I said earlier in this thread Canon has confirmed that my 5D3 has AF problems, which explains why I've had issues with several different lenses in recent months.
Prior to the 5D3, I had a 5D2 with Canon 35L, 85L, 50/1.4 and 100/2. I had no AF issues whatsoever. And yes, I was shooting my normal subjects at close distances and I never once had to "test" these lenses to make sure they focused properly. They just did.
With my 5D3, focus has been erratic and inconsistent with several lenses, which is why I suspected it had a problem in the first place. That said, the AF has been far worse with the two copies of the Sigma 35 I have than other Canon lenses like the 24-70, 50/1.4 and 40/2.8. It's probably not fair to judge the AF of a lens with a camera body that has AF problems; that's why I said I'll wait until getting the 5D3 back from Canon to make any judgments.
But the main point is this: I know how to shoot with wide aperture lenses, I have many fast lenses and previous camera bodies that I've never had any AF problems with. The same is true for other people in this thread. So why, then, if we notice problems with a new lens would it suddenly be an issue with our technique or the way we're testing a lens? That doesn't make any sense. There's a gap in your logic here.
This is a silly argument, especially in light of the fact that my 5D3 has AF problems. That is why I've had AF problems with several (3, not 7) lenses, not because of problems with my AF technique or the way I test lenses. I never had issues before with a different camera body, and I never found the need to "test" lenses on a tripod with focus charts. They just worked.