Contrast ratio results for Sony A700

Contrast ratio 10205:1
Monitor model Sony A700
Submitted 07 Sep 2009 11:03 CEST, by 58.31.*.*
Camera model Sony DSLR-A700
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 11.5 s (Set EV to +3.5)
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: image file 3: automatic white balance can cause inaccuracies.
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Overexposed. Please decrease the shutter time.
Note: image file 3: suggested exposure time: 1/220 s (Set EV to -1.8)
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 0.03 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –6.02 stops   (aim for –2 to –3)
Exposure spread 0.65 stops
Area used for calculation 0.5 x 0.562
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 264 cd/m2
Luminance spread 33 cd/m2 (2 standard deviations)
Exposure value –1.35 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 0.5 x 0.562
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 64 cd/m2
Luminance spread 78 cd/m2 (2 standard deviations)
Exposure value –0.65 stops   (aim for –2 to –3)
Exposure spread 2.03 stops
Area used for calculation 0.5 x 0.562
Camera settings Exposure time: 1/60   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0

The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.