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

Contrast ratio of LG 34UC87M-B

Contrast ratio 885:1 (edge: 1508:1)
Monitor model LG 34UC87M-B
Submitted 15 Jun 2016 02:28 CEST, by 178.222.*.*
Camera model Nikon D7100
Processing remarks

Note: image file 3: suggested exposure time: 2.6 s (Set EV to +1.4)

Black
Screen photo
[open image]
Luminance 0.2 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –3.08 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 0.236 x 0.265
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 17 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 175 cd/m2
Luminance spread 8 cd/m2 (2 standard deviations)
Exposure value –1.94 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.236 x 0.265
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 17 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.12 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.85 stops   (aim for –2 to –3)
Exposure spread 0.41 stops
Area used for calculation 0.236 x 0.265
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 17 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.