Canon 5D Mark III - underexposes

[suntcatalin]

Hello,

I've noticed that my Canon 5D Mark III underexposes somewhere between 2/3 stops and one stop.

I've taken a test photo and I've attached the histogram and the exif. I photographed a white sheet of paper

Is this behaviour normal or is there a problem in the camera's metering system?

Thanks,

Catalin

Histogram

Test photo

I have also attached the full exif:

[Image]
Make = Canon
Model = Canon EOS 5D Mark III
Orientation = top/left
X Resolution = 72
Y Resolution = 72
Resolution Unit = inch
Date Time = 2014-01-20 21:16:29
Artist = Catalin Fuioaga
YCbCr Positioning = co-sited
Copyright = Catalin Fuioaga
Exif IFD Pointer = Offset: 360
GPS Info IFD Pointer = Offset: 9554

[Camera]
Exposure Time = 1/200"
F Number = F5.6
Exposure Program = Normal program
ISO Speed Ratings = 2000
8830 = 2
8832 = 2000
Exif Version = 30, 32, 33, 30
Date Time Original = 2014-01-20 21:16:29
Date Time Digitized = 2014-01-20 21:16:29
Components Configuration = YCbcr
Shutter Speed Value = 7.63 TV
Aperture Value = 5 AV
Exposure Bias Value = ±0EV
Metering Mode = Partial
Flash = Flash did not fire, compulsory flash mode
Focal Length = 105mm
Maker Note = 8152 Byte
User Comment =
Subsec Time =
Subsec Time Original =
Subsec Time Digitized =
Flashpix Version = Version 1.0
Color Space = sRGB
Exif Image Width = 2880
Exif Image Height = 1920
Interoperability IFD Pointer = Offset: 9326
Focal Plane X Resolution = 1971.253
Focal Plane Y Resolution = 1975.309
Focal Plane Resolution Unit = inch
Custom Rendered = Normal process
Exposure Mode = Auto exposure
White Balance = Manual white balance
Scene Capture Type = Normal
A430 =
A431 = 073024017512
A432 = 24/1, 105/1, 0/1, 0/1
A434 = EF24-105mm f/4L IS USM
A435 = 00001bcf3a

[GPS]
GPS Version ID = 2, 3, 0, 0

[Interoperability]
Interoperability Index = ExifR98
Interoperability Version = Version 1.0

[Thumbnail Info]
Compression = JPEG Compressed (Thumbnail)
X Resolution = 72
Y Resolution = 72
Resolution Unit = inch
JPEG Interchange Format = Offset: 11444
JPEG Interchange Format Length = Length: 3320

[Thumbnail]
Thumbnail = 160 x 120

[jondaddio]

Somehow, my EOS 5D Mark III got into a mode where it was creating very dark images.  I was using normal camera automatic settings (at least I did nothing to change any settings).  The "Clear All Camera Settings" did the trick for me as stated by @marcosphoto.  Now they look normal again.

[marcosphoto]

Hey thats good news and interesting too - now you've proven that the info I came across actually does something.  I have run into a period where I have used my camera very little, so I've had little need to run any controlled testing on mine yet.  I did a wedding a couple months ago and it was behaving.