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

Contrast ratio results

Contrast ratio 68281:1
Monitor model
Submitted 30 Nov 2009 06:19 CET, by 81.193.*.*
Camera model Fujifilm FinePix F31fd
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 433.2 s (Set EV to +10.8)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/160 s (Set EV to -2.3)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –13.26 stops   (aim for –2 to –3)
Exposure spread 1.87 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 47 cd/m2
Luminance spread 2 cd/m2 (2 standard deviations)
Exposure value –0.24 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/33   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.