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  1. #1
    Nekrose's Avatar
    Nekrose is offline dPS Forum Member
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    Default Canon 7D Soft Focus

    I was just wondering if anybody was having soft focusing issues with the Canon 7D. I have too many photo's that have been soft, and I am hoping that somebody has an answer to this problem.

    Here is a photo that I have which shows the problem. The focus was supposed to be on her face:

    Drea (20)
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    RolandAA is offline dPS Forum Member
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    Default

    I noticed that the ISO was 3200 and a shutter speed of 1/4000. The camera applies a pretty heavy noise reduction to higher ISOs which softens the image. You could have had a sharper image by using using 400 ISO and 1/1000 or 200 ISO and 1/500.

    I went from a 10MP XTi to a 15MP 50D a few weeks ago and when looking at 100% view also thought my images were softer than with my old camera. By zooming out to a 66% view which matches the image size of the Xti I realized that the images are as sharp or sharper. When pixel peeping all those extra pixels make anything not absolutely perfect much more apparent. The other thing I needed to do was use the AF micro adjustment to correct some back focusing.

    Hope that helps!

  3. #3
    OsmosisStudios's Avatar
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    Yup, that's heavy noise reduction from being at 3200ISO. You're on the beach at mid-day, you'll be fine. Just as an indicator, here are equivalent exposures (with the aperture remaining the same).

    Code:
    ISO          TV          AV
    100          125         f/5.6
    200          250         f/5.6
    400          500         f/5.6
    800          1000        f/5.6
    1600         2000        f/5.6
    3200         4000        f/5.6
    So since you're at ISO3200, 1/4000s and f/5.6, you can drop your ISO all the way to 100 and keep youre aperture the same while still maintaining a 1/125 shutter speed.

    If you had a faster lens (say an f/2.8 zoom or f/1.4 prime) you could drop things down another 2 and 4 stops (respectively). Of course, you cant get the ISO any lower, so your shutter speed would go up.
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    Nekrose's Avatar
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    Default

    I definitely agree, that may have been a bad example, sorry.

    I know that there was some major noise, and that by softening it I lost a lot of detail, but on most of the other shots, the ISO was strictly set to 100. This was sort of an impromptu shot after I was shooting in the jungle and turned the camera off.

    But on the other images, the ones with ISO set at 100, even using a 50mm and flash, the shot's are very soft.
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    OsmosisStudios's Avatar
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    Then let's see the other examples/
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