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

Contrast ratio results

Contrast ratio 1123:1
Monitor model
Submitted 25 Jan 2018 03:50 CET, by 158.140.*.*
Camera model samsung SM-G930F
Processing remarks

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: 1.3 s (Set EV to +2.3)
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.

Black
Screen photo
[open image]
Luminance 0.17 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –4.84 stops   (aim for –2 to –3)
Exposure spread 0.74 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1/4   ISO: 200   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 194 cd/m2
Luminance spread 34 cd/m2 (2 standard deviations)
Exposure value –1.15 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1/350   ISO: 200   F-number: 1.7
Focal length: 26 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.