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Calibrating a lens.

  • 06-07-2011 11:10am
    #1
    bernard0368
    Registered Users, Registered Users 2 Posts: 1,424 ✭✭✭


    My Sigma 150-500 lens is doing my head in. It is quite sharp on my old 40d but is not close on my 7d. I have tried micro-adjusting -20 through to +20 and I am not getting anywhere close to the sharpness on the 40d. All the other lenses are perfect or have adjusted fine.
    Has anyone any ideas?


Comments

  • #2
    hbr
    Closed Accounts Posts: 760 ✭✭✭hbr


    bernard0368 wrote: »
    My Sigma 150-500 lens is doing my head in. It is quite sharp on my old 40d but is not close on my 7d. I have tried micro-adjusting -20 through to +20 and I am not getting anywhere close to the sharpness on the 40d. All the other lenses are perfect or have adjusted fine.
    Has anyone any ideas?

    Is this a focus issue or is the extra resolution of the 7D just
    better at showing the sharpness limits of the lens?

    Try focusing on a page of text, a ruler or a focus test chart at
    a 45 degree angle. This should show you whether you have a
    focus problem or not.

    If you are shooting JPEG, make sure both cameras use the
    same settings. It is probably best to use RAW for the comparison.


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