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

Contrast ratio results

Contrast ratio 3:1
Monitor model
Submitted 17 Feb 2019 23:06 CET, by 75.66.*.*
Camera model Nikon D810
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: 1/9 s (Set EV to +4.7)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.09 cd/m2
Luminance spread 0.32 cd/m2 (2 standard deviations)
Exposure value –7.16 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.973 x 1
Camera settings Exposure time: 1/250   ISO: 12800   F-number: 2.8
Focal length: 70 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 0.26 cd/m2
Luminance spread 0.11 cd/m2 (2 standard deviations)
Exposure value –2.7 stops   (aim for –2 to –3)
Exposure spread 0.61 stops
Area used for calculation 0.973 x 1
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 70 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.