Question about Canon EF-S 17-85MM F/4-5.6 IS USM Lens

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Cant adjust below f/5.6 on a eos 40d

Please forgive me if I'm being a little ignorant here as I am new to SLR's but I have just purchased an EOS 40D with the canon EF-S 17-85mm F4-5.6 IS USM lens.

Now my understanding was that this would adjust to F/4 at wide angle and a max of F/5.6 at the zoom end. However at no point in the zoom range wil;l the camera let me adjust the appeture below F5.6. (I have tried another lens on this body which will drop below F5.6)

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  • chris_parks_ Dec 21, 2008

    Any where you can select the aperture (Aperture priority or full manual)

  • jcdill
    jcdill May 11, 2010

    Which shooting mode are you using?


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You are correct in thinking that it should be possible to set the aperture wider than f/5.6 at the wide end of the zoom range.  My best guess is that the lens is defective.  I'd suggest returning it for a replacement.

Posted on Dec 26, 2008

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