topic Re: 5D mkIII footage flashing when ISO is set manually in EOS DSLR & Mirrorless Cameras

5D mkIII footage flashing when ISO is set manually

fr3nchie — Fri, 09 Oct 2015 06:33:45 GMT

Hi,

I noticed when filming with my Canon MkIII that the footage was strobbing/flashing (as if quickly switching between two exposures). Also the LCD screen switches between two exposures, perhaps every 5 seconds or so. It took me a while but I realised this only occurs when the camera is in manual mode and the iso is set to a value (not on Auto). I've tried everything, re-set all my preferences etc.. But the problem persists.

Has anyone experienced a similar issue, or have any idea as to what could be causing this?

Many thanks,
Marc

Re: 5D mkIII footage flashing when ISO is set manually

Peter — Fri, 09 Oct 2015 08:22:58 GMT

Is it same without a lens? I have the same with my 6D and with an old lens adapter.

Re: 5D mkIII footage flashing when ISO is set manually

fr3nchie — Fri, 09 Oct 2015 17:41:27 GMT

Hi Peter,

Thanks for your response. Yes I just tried filming with no lens and I get the same result..

marc

Re: 5D mkIII footage flashing when ISO is set manually

Peter — Fri, 09 Oct 2015 17:48:11 GMT

Can you upload a sample at perhaps youtube or here?

Re: 5D mkIII footage flashing when ISO is set manually

fr3nchie — Sun, 11 Oct 2015 02:18:18 GMT

I managed to fix the problem.

I have magic lantern installed on my camera to enable raw filming, there was a setting in there accidentally turned on. 'HDR shooting' which I'm guessing shoots two different exposures simultaneously..

Thanks,

Marc

Re: 5D mkIII footage flashing when ISO is set manually

Peter — Sun, 11 Oct 2015 06:35:20 GMT

Yes. Hdr video will give you that effect.