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

Contrast ratio results for asus

Contrast ratio 561:1
Monitor model asus
Submitted 15 Dec 2017 21:44 CET, by 93.137.*.*
Camera model Canon EOS 40D
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
[open image]
Luminance 0.37 cd/m2
Luminance spread 0.83 cd/m2 (2 standard deviations)
Exposure value –3.34 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.833 x 0.937
Camera settings Exposure time: 0.6   ISO: 800   F-number: 4.6
Focal length: 60 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 208 cd/m2
Luminance spread 122 cd/m2 (2 standard deviations)
Exposure value –3.1 stops   (aim for –2 to –3)
Exposure spread 0.87 stops
Area used for calculation 0.833 x 0.937
Camera settings Exposure time: 1/790   ISO: 800   F-number: 4.6
Focal length: 60 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 109 cd/m2
Luminance spread 220 cd/m2 (2 standard deviations)
Exposure value –2.41 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.833 x 0.937
Camera settings Exposure time: 1/256   ISO: 800   F-number: 4.6
Focal length: 60 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.