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

Contrast ratio results for AOC/q2770pqu

Contrast ratio 708:1
Monitor model AOC/q2770pqu
Submitted 21 May 2014 01:38 CEST, by 89.68.*.*
Camera model Sony DSC-H1
Processing remarks

Note: image file 1: suggested exposure time: 0.9 s (Set EV to -1.2)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
[open image]
Luminance 0.34 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –1.32 stops   (aim for –2 to –3)
Exposure spread 0.55 stops
Area used for calculation 0.558 x 0.558
Camera settings Exposure time: 2   ISO: 400   F-number: 2.8
Focal length: 38.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 237 cd/m2
Luminance spread 28 cd/m2 (2 standard deviations)
Exposure value –2.18 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.558 x 0.558
Camera settings Exposure time: 1/640   ISO: 400   F-number: 2.8
Focal length: 38.6 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.