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

Contrast ratio results

Contrast ratio 10208:1 (edge: 32722:1)
Monitor model
Submitted 27 Apr 2019 16:20 CEST, by 14.139.*.*
Camera model OnePlus A3003
Processing remarks

image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 21.6 s (Set EV to +4.4)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 69.3 s (Set EV to +6.1)

Black
Screen photo
[open image]
Luminance 0.01 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –6.93 stops   (aim for –2 to –3)
Exposure spread 1.31 stops
Area used for calculation 0.391 x 0.431
Camera settings Exposure time: 1   ISO: 400   F-number: 2
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 71 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –2.26 stops   (aim for –2 to –3)
Exposure spread 0.14 stops
Area used for calculation 0.417 x 0.384
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –8.62 stops   (aim for –2 to –3)
Exposure spread 1.06 stops
Area used for calculation 0.403 x 0.408
Camera settings Exposure time: 1   ISO: 400   F-number: 2
Focal length: 28 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.