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

Contrast ratio results

Contrast ratio 5321:1 (edge: 8212:1)
Monitor model
Submitted 15 Dec 2011 03:54 CET, by 78.144.*.*
Camera model Fujifilm FinePix JZ500
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 13.9 s (Set EV to +5.8)
Note: image file 2: suggested exposure time: 1/380 s (Set EV to -1.7)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 21.5 s (Set EV to +6.4)

Black
Screen photo
[open image]
Luminance 0.03 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –8.3 stops   (aim for –2 to –3)
Exposure spread 0.86 stops
Area used for calculation 0.373 x 0.373
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.2
Focal length: 25.8 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 148 cd/m2
Luminance spread 6 cd/m2 (2 standard deviations)
Exposure value –0.81 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.373 x 0.373
Camera settings Exposure time: 1/119   ISO: 400   F-number: 3.2
Focal length: 25.8 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –8.92 stops   (aim for –2 to –3)
Exposure spread 0.7 stops
Area used for calculation 0.373 x 0.373
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.2
Focal length: 25.8 mm   (35 mm equivalent)
Exposure compensation: 0
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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.