Any metering issues with the 5D3?

Started Aug 9, 2012 | Discussions thread
Olgierd Regular Member • Posts: 397
Have heavy underexposure issue with flash... following scenario (tested with 580/580II/600 on three different 5d3 bodies):

  • 5d3 with flash on camera, head straight forward with diffuser or small soft box and ETTL set to evaluative - exposure requires +2 1/2 to +3 F-stops compensation at

practicaly any scene, even plain dark background. A slight tilt of the flash head up or removal of the diffuser/soft box or switching flash ETTL metering average and problem is gone.

My friends and I have tested it with 24-70 f2.8, 100L macro and 70-200 L II (all at f2.8). Don't see as much underexposure at wider focal lengths (like with 16-35 L II).

Could you please test this on your model? If this is common and bugging some more people perhaps we could ask Canon some questions?


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Good or bad I'm guy with a big lens.

 Olgierd's gear list:Olgierd's gear list
Canon EOS 5D Mark III Canon EOS M Canon EOS 7D Mark II Canon EF 16-35mm F2.8L II USM Canon EF 24-70mm f/2.8L USM +10 more
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