5D Mark III err01 with Exposure Override and Dandelion chip

Issue #1940 new
Piotr_23 created an issue

Installed ML 2014-03-26. Started playing with the manual lens, Zeiss Planar 50 mm attached to the camera with the Dandelion chip, like this: http://tinyurl.com/ow3bsl5. I programmed the chip so it knows that the lowest f number is 1.6. Now, when Exposure Override is OFF. I can take well exposed pictures with f 1.6-8.0. But when I set Exposure Override to ON, and set both lens aperture as well the f on camera to 1.6 or 2.8 or 4.0: fine, but setting both values to 5.6 or 8.0: bump: the err 01 appears (Camera lost the contact with lens) and I have to reboot. The contacts are clean, it only occurs with Exposure Override mode ON. The camera saves the log, attached. Could it be similar to https://bitbucket.org/hudson/magic-lantern/issue/1935/5d-mark-iii-err01-the-camera-is-damage ? or this: https://bitbucket.org/hudson/magic-lantern/issue/1486/err-01-eos-550d-and-tamron-sp-17-50-f-28 or this: https://bitbucket.org/hudson/magic-lantern/issue/1921/aperture-control-unstable ?

Comments (8)

  1. Alex

    I'll try with my Optix V6 and see what I can come up with.

    However, with a chip that reports aperture, you should not need exposure override (though it shouldn't cause a crash either).

  2. Piotr_23 reporter

    Thanks, a1ex. I installed ML specifically to use it with manual lenses and for dual ISO. Perhaps in the future, ML could read and display or maybe even program Dandelion and Optix V6 chips.... Make its use simpler. Thank you

  3. Alex

    Thing is... I had quite a few issues with Optix V6 on 5D3 (basically entering program mode without me doing anything special), and this was without ML. Maybe it was just misaligned lens contacts, but couldn't reproduce the issues on 5D2. I'll keep trying.

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