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

Contrast ratio results for Samsung SyncMaster S27B750

Contrast ratio 989:1
Monitor model Samsung SyncMaster S27B750
Submitted 20 May 2012 21:14 CEST, by 145.120.*.*
Camera model Canon IXUS 220HS
Processing remarks

Note: image file 1: suggested exposure time: 1.2 s (Set EV to +1.0)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.11 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –3.55 stops   (aim for –2 to –3)
Exposure spread 0.74 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 0.6   ISO: 800   F-number: 2.7
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 110 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –1.52 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 1/101   ISO: 200   F-number: 2.7
Focal length: 24 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.