Contrast ratio results

Contrast ratio 491:1
Monitor model
Submitted 26 Mar 2011 07:32 CET, by 99.41.*.*
Camera model CASIO COMPUTER CO.LTD. EX-Z75
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 2.4 s (Set EV to +1.0)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/100 s (Set EV to +0.6)
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 1/81 s (Set EV to -0.4)
Warning: Image F-number settings are not the same.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 0.15 cd/m2
Luminance spread 0.26 cd/m2 (2 standard deviations)
Exposure value –5.47 stops   (aim for –2 to –3)
Exposure spread 3.66 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 0.3   ISO: 400   F-number: 3.1
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
Luminance 76 cd/m2
Luminance spread 59 cd/m2 (2 standard deviations)
Exposure value –5.13 stops   (aim for –2 to –3)
Exposure spread 1.19 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/640   ISO: 400   F-number: 4.4
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: -2
Black at screen edge
Screen photo
Luminance 59 cd/m2
Luminance spread 127 cd/m2 (2 standard deviations)
Exposure value –4.12 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/250   ISO: 400   F-number: 4.4
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: -2

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.