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

Contrast ratio results for ASUS VW246H

Contrast ratio 2190:1
Monitor model ASUS VW246H
Submitted 18 Sep 2017 02:45 CEST, by 172.58.*.*
Camera model Apple iPhone 6s Plus
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 3.4 s (Set EV to +3.8)
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/81 s (Set EV to -2.4)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.07 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –6.25 stops   (aim for –2 to –3)
Exposure spread 0.47 stops
Area used for calculation 0.637 x 0.478
Camera settings Exposure time: 1/4   ISO: 320   F-number: 2.2
Focal length: 39 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 149 cd/m2
Luminance spread 4 cd/m2 (2 standard deviations)
Exposure value –0.06 stops   (aim for –2 to –3)
Exposure spread 0.04 stops
Area used for calculation 0.637 x 0.478
Camera settings Exposure time: 1/15   ISO: 40   F-number: 2.2
Focal length: 39 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.