Contrast ratio | Test results | LCD test | Small-screen tests | Lagom home

Contrast ratio results

Contrast ratio 9.05955e+09:1
Monitor model
Submitted 01 Dec 2008 02:08 CET, by 193.219.*.*
Camera model CASIO COMPUTER CO.LTD EX-P700
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 222526560.0 s (Set EV to +31.4)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 2: suggested exposure time: 1/41 s (Set EV to -1.6)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –33.93 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.477 x 0.477
Camera settings Exposure time: 1/13   ISO: 80   F-number: 5.6
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 241 cd/m2
Luminance spread 29 cd/m2 (2 standard deviations)
Exposure value –0.85 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.477 x 0.477
Camera settings Exposure time: 1/13   ISO: 80   F-number: 5.6
Focal length: 33 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.