Restricted apertures using manual settings on Canon 5d3

by Tommo-on-Thames   Last Updated June 29, 2020 22:18 PM - source

I have full aperture range on my Canon 5D3 in Av and tested with different lenses, but in Manual, the camera controls only vary between 3 f stops and not always the same stops. Option, it seems to me are:

  1. an incorrect setting buried in a submenu.
  2. Firmware error.
  3. Hardware or other.

If 2. above, is that fixable with a firmware update/reinstall?

Any suggestions gratefully received.

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