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

Contrast ratio of Samsung S23C450B (TN)

Contrast ratio 643:1
Monitor model Samsung S23C450B (TN)
Submitted 29 Nov 2013 12:26 CET, by 212.37.*.*
Camera model Nikon COOLPIX P50
Processing remarks

Note: image file 1: suggested exposure time: 3.3 s (Set EV to -1.3)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 0.19 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –1.24 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 0.448 x 0.448
Camera settings Exposure time: 8   ISO: 200   F-number: 2.9
Focal length: 31 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 122 cd/m2
Luminance spread 16 cd/m2 (2 standard deviations)
Exposure value –1.88 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.448 x 0.448
Camera settings Exposure time: 1/125   ISO: 200   F-number: 2.9
Focal length: 31 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.