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

Contrast ratio results

Contrast ratio 223:1
Monitor model
Submitted 03 Jun 2012 02:23 CEST, by 68.103.*.*
Camera model SAMSUNG VLUU ST5000 ST5000 TL240
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –2.58 stops   (aim for –2 to –3)
Exposure spread 2.44 stops
Area used for calculation 0.448 x 0.448
Camera settings Exposure time: 0.8   ISO: 3200   F-number: 3.3
Focal length: 31 mm   (35 mm equivalent)
Exposure compensation: 1.3
White
Screen photo
[open image]
Luminance 14 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –2.46 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.448 x 0.448
Camera settings Exposure time: 1/8   ISO: 100   F-number: 3.3
Focal length: 31 mm   (35 mm equivalent)
Exposure compensation: -0.7

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.