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

Contrast ratio results for dell

Contrast ratio 8489:1
Monitor model dell
Submitted 15 Jun 2020 02:22 CEST, by 46.103.*.*
Camera model Nikon D40
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 30.1 s (Set EV to +6.9)

Black
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –9.41 stops   (aim for –2 to –3)
Exposure spread 0.71 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 131 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –2.33 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/250   ISO: 400   F-number: 3.5
Focal length: 27 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.