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

Contrast ratio results

Contrast ratio 645:1
Monitor model
Submitted 02 Dec 2019 22:03 CET, by 89.246.*.*
Camera model Olympus E-M1
Processing remarks

Warning: using the flash makes no sense.
Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 4.4 s (Set EV to +2.2)
Warning: using the flash makes no sense.
Warning: image file 2: automatic white balance can cause inaccuracies.
Note: image file 2: suggested exposure time: 1/150 s (Set EV to +1.5)

Black
Screen photo
[open image]
Luminance 0.07 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –4.65 stops   (aim for –2 to –3)
Exposure spread 0.88 stops
Area used for calculation 0.751 x 0.845
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 54.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 43 cd/m2
Luminance spread 16 cd/m2 (2 standard deviations)
Exposure value –3.96 stops   (aim for –2 to –3)
Exposure spread 0.53 stops
Area used for calculation 0.751 x 0.845
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 54.1 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.