7D and Sigma 70-200 EX focus probs

After playing around with the MA this is the best that I can get it, I am new at this though.

Subject was seated in the same spot for both and sat very still, she did a great job. These are jpgs straight from camera. Both were taken from a tripod at f2.8, 1/25, iso 3200 and MA is set to -20.

Here my focus point was on her eye:

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Thats definitely a focusing problem. contact sigma and see what they say.

I've spoken to them on the phone. Given the age of the lens I'm in for approximately $130 which consists of $95 flat rate plus parts and taxes. Things are kinda tight right now, I can do it but I'd rather not if I can avoid it.

No warranty? Warranty is 10 years.

Bring it into service at Gentec in Markham, Ontario, total cost is at most $95.
I brought my 70-200 in, and every time it comes back it's always $95, same with other lenses.

Service at Gentec is top notch.
Ask for David Rees.
He's very understanding, and took care of me and my Sigma 24-70 F/2.8 Macro, even when I had no proof of purchase but a store price tag on the box, under warranty.

Top notch service at Gentec. Great CSR's.

Warranty is 10 years for EX lenses that are... 2004/2005 or newer(I can't remember which). So the Gentec rep said on the phone anyway, but since it didn't apply to me I didn't store the info as vital. It was a 5 year warranty for EX lenses that were purchased previous to whatever year it was he said, and 2000/2001, when mine were purchased, falls into that category. He suggested bringing them in to see what they could do, I am going to go in on Monday morning. My Sigma EX 105mm macro doesn't work at all so that needs fixing before this gets serviced.

I think you can try af adjust bit more before you send it in. Unless you reached max adjustment an it's still a problem. Try MF in live view 10x zoomed as the baseline. Then defocus and watch where the af moved the lens the difference between that and the baseline will show you which way to adjust plus suggest to you roughly yht amount needed. After setting an adjustment try again. It's time consuming but you can get good results without spending a dim. Oh and use large high contrast flat target.

Maybe your focus is so far forward be cause you've set you're MA to -20, which shifts the focus forward.

yeah, what made you set the AF micro adjustment to -20? No wonder you have serious front focus issue.
Try to set it back to 0 and go from there.

Funny thing, at -15 I'm getting the same results. I'm going to play with this tomorrow with stationary objects and see what happens. Before I made any adjustment at all I was getting a front focus, that's what started me playing with the MA.

Same lens at f3.2 and no MA. The focus was on the eye but the nose is what is sharp:

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I set the MA to -20 because the settings I tried first were doing nothing, that's what I got with -20 and focusing on ears. Now it appears it could have been on any setting and the only ways to get the eyes sharp would be to focus on the ears. Further testing is showing the MA to be doing nothing.

Go extreme, set it to +20 and post up the result. And you should be trying a static target at the same distance to help see what is really going on.

The dog is really getting annoyed at my shenanigans at 1AM and losing interest in being a good subject. It does appear I'm making ground in the +17 range though. Going to try tomorrow with something stationary.

ions wrote in post #9508540
The dog is really getting annoyed at my shenanigans at 1AM and losing interest in being a good subject.

Hah, My dogs will sit without moving a muscle for half a day, but they some how know when I try to take a picture of them as they don't stay still at all then.

Have you tried AI Servo focus on your dog moving? Try it and check the results. My 7D was fine for static objects with my Sigma 120-300 and 70-200, but totally oof for moving objects on both.
Spoke to Sigma and they advised that if both lenses worked fine with the 40D, which they did, then there shouldn't be an issue with the 7D. The 7D is back to Canon for repair or replacement.

I bought the same lens to use on my 1D MkIII. It front focused so badly that the full camera adjustment was not enough. I took it to the Sigma "hospital" where they rectified it. It is now spot on. Strange scenario because I purchased the lense after using a borrowed one which was A1 out of the box !