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Thread: Lens -- SHARPNESS

  1. #1

    Lens -- SHARPNESS

    I have three prime lenses that I want to use for a function.Light is not a big problem as I have external flashes and other stuff .
    Can you give me what value(s) or range of F I can get the sharpest Pics.
    The lens I have are

    Canon Lenses

    EF 24mm f/1.4L II USM Autofocus Lens
    EF 50mm f/1.8 II Autofocus Lens
    EF 100mm f/2.8L Macro IS USM Lens
    Telephoto EF 135mm f/2.0L USM Autofocus Lens

    Thanks in advance

  2. #2
    Senior Member
    Join Date
    Dec 2008
    Vancouver, Washington, USA
    Personally, I tend to choose f-number based on depth of field. Sharpness doesn't really factor into it for me. But I'd pick these for sharpness:

    24mm: f/2.8+
    50mm: f/2.8+
    100mm: wide open
    135mm: f/2.8+

  3. #3
    Senior Member
    Join Date
    Dec 2008
    Planet Earth
    The two I own:

    EF 24mm f/1.4L II USM Autofocus Lens... anything over 2 that is in the middle of the DOF. Stay close to F/8 and the DOF is very forgiving.

    EF 100mm f/2.8L Macro IS USM Lens...It is all sharp, but the lens is at its best between F/5.6 and F/11. Wide open it will vignette on a FF camera but it will be sharp in the center.

    There is so much more that goes in to a picture sharp than the F stop, that with those lenses it is more important to master the other things. Shutter speed and camera shake will hurt you more than having your lens wide open.

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