Weird Exposure on 5Ds

[Diko]

Can anyone explain this?

The software reviewing the photo is FastStone Image Viewer

 

[Diko]

Here is another weird number:

 

[Diko]

I think Neuro had some pretty good explanation here

 

[neuroanatomist]

Interesting... If you view EXIF in other software (DPP, LR, etc.), are the values 'normal'? I haven't run across the viewer you're using, but there are a lot of data in the EXIF.

For example, when looking at an image in Mac OS X Preview (the default OS viewer), a 1/2500 s, f/6.3 shows those values for Exposure Time and FNumber, but also shows a Shutter Speed Value of 1/2655. The max aperture value for the lens (600/4L IS II + 1.4xIII = f/5.6) is reported as 5.657.