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5D3 - Automatically adjusting aperture *Video Included*

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Luke Tyrrell
5D3 - Automatically adjusting aperture *Video Included*
on Mar 25, 2014 at 9:00:14 am

I have an issue that seems to have come on since installing magic lantern, or maybe its just a coincidence..
When I zoom in the I hear a clicking noise as if the aperture keeps adjusting and flickering automatically. The f stop numbers dont change on the screen but clearly the aperture is being adjusted. This doesn't happen when the aperture is on the lowest fstop and doesn't happen when the lens is fully zoomed out.

I made a video so you can see what mean:









This ONLY happens when set to video mode and even with the magic lantern SD card removed Really need some help if anyone can shed any light on it?

Thanks


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Ryan Holmes
Re: 5D3 - Automatically adjusting aperture *Video Included*
on Mar 25, 2014 at 4:06:31 pm

Does it happen with other lenses on the same camera?

Have you powered the camera off, removed the battery (and all cards), and restarted the camera?

You can always reinstall the firmware of the camera as a last ditch attempt. The 5D3 that I run doesn't have these problems and we do run ML software on it from time to time.

Ryan Holmes
http://www.ryanholmes.me
@CutColorPost


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Luke Tyrrell
Re: 5D3 - Automatically adjusting aperture *Video Included*
on Mar 27, 2014 at 12:42:17 pm

Update -

It appears this is a lens fault, the camera is working fine with other lenses. I only had a 50mm prime to test is on before but I have tested it on a 24-70 and there is no problem.

Pretty relieved that its not a camera issue, still sucks as it wasnt a cheap lens..

Thanks for the reply dude


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