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

Contrast ratio results

Contrast ratio 1106:1
Monitor model
Submitted 10 Dec 2020 23:51 CET, by 73.7.*.*
Camera model Sony ILCE-7M3
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 5.4 s (Set EV to +3.1)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/200 s (Set EV to +1.7)

Black
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –7.94 stops   (aim for –2 to –3)
Exposure spread 1.44 stops
Area used for calculation 0.958 x 1
Camera settings Exposure time: 1/8   ISO: 400   F-number: 2.8
Focal length: 69 mm   (35 mm equivalent)
Exposure compensation: -2.3
White
Screen photo
[open image]
Luminance 60 cd/m2
Luminance spread 41 cd/m2 (2 standard deviations)
Exposure value –6.48 stops   (aim for –2 to –3)
Exposure spread 1.03 stops
Area used for calculation 0.958 x 1
Camera settings Exposure time: 1/3200   ISO: 400   F-number: 2.8
Focal length: 69 mm   (35 mm equivalent)
Exposure compensation: -2.3
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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.