I am unable to change the aperture in manual mode. The power switch is in the correct position but although the shutter speed changes, the aperture will not budge from 6.3. Any ideas what I might have inadvertently altered?
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2What lens is attached to your camera? It wouldn't happen to be a fixed aperture f/6.3 mirror lens would it? – Michael C Feb 18 '16 at 20:20
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1Does the aperture change in Av or Tv modes? – Mike Sowsun Feb 18 '16 at 21:02
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Are you trying to stop down or open up the lens? – inkista Feb 18 '16 at 21:46
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1Is f/6.3 the maximum aperture for the lens at the focal length to which you have it zoomed? – Michael C Feb 18 '16 at 22:45
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Thanks for your input guys - I've tried with 70-200, 24-70 and 16-35, all with greater and lower f stops. I've tried to step up and down to no effect and it works correctly in both AV and TV modes??? – Dick Chapman Feb 19 '16 at 21:00
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As you wrote that “it works correctly in both AV and TV modes”, where only one value is changed at a time, the following might work:
In full manual mode (»M«), to change the shutter speed, you use the rotating dial on the top right of the camera whereas for the aperture, you use the large dial to the right of the display. To be able to use that dial, the on-off-switch has to be set to the position above “on” which has a pointing line on top of it which leads to the dial.
As you stated that “[t]he power switch is in the correct position”, the above should work. If it still doesn’t, please check whether the dial works in other scenarios such as flickering through your images. If it doesn’t—while the power switch is in the correct state—please contact Canon or others for repair.
You can also find an explanation of how to change the settings in the manual that can be found on Canon’s support page for the EOS 5D Mark 2
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