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Thread started 01 Jan 2011 (Saturday) 07:44
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Am I imagining a 7D focus problem?

 
Plumtreelad
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Jan 01, 2011 07:44 |  #1

I have owned the 7D for just over a year and I cannot convince myself that the auto focus works well. Too many of my shots seem soft and a little out of focus.I have sent my 24 - 105 back to Canon for recalibrating but it has made no difference. I am mad with myself for not doing something about it within the year so that I could ask Canon to look at it under warranty. Is it just my technique that is wanting, or have others had inexplicable focussing problems?


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Jan 01, 2011 07:51 |  #2

I have two 7Ds and I couldn't be happier with the sharpness. Much improvement over my previous 50D, certainly more consistent.


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Gatorboy
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Jan 01, 2011 08:06 |  #3

Most likely it's operator error. Post some samples.


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Plumtreelad
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Jan 01, 2011 08:12 |  #4

Gatorboy wrote in post #11551670 (external link)
Most likely it's operator error. Post some samples.

Thanks for the advice. I guess that you might say that. I have looked at stickys on this topic and most say the 7D is great. If it is operator error, where do I start. I will upload an example later but wondered what are the most common causes of poor focussing technique


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yourdoinitwrong
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Jan 01, 2011 08:13 as a reply to  @ Gatorboy's post |  #5

We really need to see some sample images with the EXIF to be able to offer any suggestions.

Edit: to answer your above question some of the causes of focus issues are SS that are too slow or using the wrong focus mode (i.e. Auto or Zone and the camera focuses on the closest object). Shooting wide open or at high ISO can also soften shots, but if you're only referring to the 24-105 then shooting wide open shouldn't be much of an issue, mine is still pretty sharp wide open. Is your focusing problem only with the 24-105 or your other lenses as well?


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Jan 01, 2011 08:15 |  #6

Not to insult, but the first question that comes to mind is, are you using your individual focus points?


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Jan 01, 2011 08:27 as a reply to  @ Evil_Edge's post |  #7

I have attached a sample taken today


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Plumtreelad
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Jan 01, 2011 08:34 |  #8

Evil_Edge wrote in post #11551686 (external link)
Not to insult, but the first question that comes to mind is, are you using your individual focus points?

No insult Evil Edge. I appreciate any advice. The photo I have just attached is taken using Single Point AF


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Jan 01, 2011 08:38 |  #9

^^Looks to me like your focus fell on the brick. The point used was directly on your subject?


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Plumtreelad
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Jan 01, 2011 08:39 |  #10

Evil_Edge wrote in post #11551738 (external link)
^^Looks to me like your focus fell on the brick. The point used was directly on your subject?

Does that mean that in your opinion the brick was in focus and I did not set up correctly?
Would I be better using Zone AF for this type of shot?


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Evil_Edge
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Jan 01, 2011 08:44 |  #11

It's so hard to trouble shoot things like this without actually holding the camera. I just know when I use my XSi or 60D and i get the right focus points most of the subjects inn my shots come out tack sharp. I just had a second look at the exposure and 1/13 is pretty slow for handheld no? Could this be the cause of a soft image as well?


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Plumtreelad
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Jan 01, 2011 08:46 |  #12

yourdoinitwrong wrote in post #11551685 (external link)
We really need to see some sample images with the EXIF to be able to offer any suggestions.

Edit: to answer your above question some of the causes of focus issues are SS that are too slow or using the wrong focus mode (i.e. Auto or Zone and the camera focuses on the closest object). Shooting wide open or at high ISO can also soften shots, but if you're only referring to the 24-105 then shooting wide open shouldn't be much of an issue, mine is still pretty sharp wide open. Is your focusing problem only with the 24-105 or your other lenses as well?

It is with other lenses as well I have attached a photo I shot earlier today higher up this thread


5D Mk III|7D |1DmkIV |10 -22 |24 -105 F4 IS L | 35 F2 IS | 70-200 F2.8 IS II L | 85 1.8 | 300 F2.8 IS MK II L|1.4 Extender MK III |
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Plumtreelad
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Jan 01, 2011 08:47 |  #13

Evil_Edge wrote in post #11551760 (external link)
It's so hard to trouble shoot things like this without actually holding the camera. I just know when I use my XSi or 60D and i get the right focus points most of the subjects inn my shots come out tack sharp. I just had a second look at the exposure and 1/13 is pretty slow for handheld no? Could this be the cause of a soft image as well?

Yes, I guess 1/13 was a little ambitious


5D Mk III|7D |1DmkIV |10 -22 |24 -105 F4 IS L | 35 F2 IS | 70-200 F2.8 IS II L | 85 1.8 | 300 F2.8 IS MK II L|1.4 Extender MK III |
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yourdoinitwrong
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Jan 01, 2011 08:49 |  #14

Plumtreelad wrote in post #11551744 (external link)
Does that mean that in your opinion the brick was in focus and I did not set up correctly?
Would I be better using Zone AF for this type of shot?

I think the bricks appear to be more in focus as well. What focus mode were you using? Also, my guess is that you were trying to have the guy at the window in focus so Zone is not necessarily the answer. A "smaller" mode like Single Point or Point Expansion would probably work better so that you force the camera to focus on that particular area. With Zone you have a much wider area for the camera to choose from and it's going to focus on either the closest object or a high contrast area where it can achieve focus. With Zone or Auto you are leaving a lot up to the camera instead of making it do what YOU want it to do. Finally 1/13 is too slow of a SS. I know the 24-105 has IS but that may be part of the issue as well.


5D4 w/BG-E20, 24-105 f/4L, 70-200 f/2.8L IS II, 35 f/1.4L, 85 f/1.8, 100 f/2.8L IS Macro, Sigma 50 f/1.4
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Plumtreelad
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Jan 01, 2011 08:56 |  #15

yourdoinitwrong wrote in post #11551781 (external link)
I think the bricks appear to be more in focus as well. What focus mode were you using? Also, my guess is that you were trying to have the guy at the window in focus so Zone is not necessarily the answer. A "smaller" mode like Single Point or Point Expansion would probably work better so that you force the camera to focus on that particular area. With Zone you have a much wider area for the camera to choose from and it's going to focus on either the closest object or a high contrast area where it can achieve focus. With Zone or Auto you are leaving a lot up to the camera instead of making it do what YOU want it to do. Finally 1/13 is too slow of a SS. I know the 24-105 has IS but that may be part of the issue as well.

Thanks for the advice. I am now going out again to see if I can find improvements based on all the advice given.

Thanks to everyone who contributed


5D Mk III|7D |1DmkIV |10 -22 |24 -105 F4 IS L | 35 F2 IS | 70-200 F2.8 IS II L | 85 1.8 | 300 F2.8 IS MK II L|1.4 Extender MK III |
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Am I imagining a 7D focus problem?
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