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

Contrast ratio results

Contrast ratio 1506:1
Monitor model
Submitted 04 May 2019 20:28 CEST, by 62.205.*.*
Camera model Sony ILCE-7S
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 0.7 s (Set EV to +1.9)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
[open image]
Luminance 0.41 cd/m2
Luminance spread 0.38 cd/m2 (2 standard deviations)
Exposure value –4.4 stops   (aim for –2 to –3)
Exposure spread 1.45 stops
Area used for calculation 0.371 x 0.495
Camera settings Exposure time: 1/5   ISO: 3200   F-number: 8
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 611 cd/m2
Luminance spread 81 cd/m2 (2 standard deviations)
Exposure value –1.16 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.371 x 0.495
Camera settings Exposure time: 1/800   ISO: 3200   F-number: 8
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0

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.