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

Contrast ratio results

Contrast ratio 2097:1
Monitor model
Submitted 16 Feb 2018 09:08 CET, by 70.120.*.*
Camera model Olympus E-510
Processing remarks

Warning: using the flash makes no sense.
Warning: using the flash makes no sense.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 37.9 s (Set EV to +3.2)

Black
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –5.74 stops   (aim for –2 to –3)
Exposure spread 2.81 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 4   ISO: 200   F-number: 3.5
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 51 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –2.35 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1/50   ISO: 200   F-number: 3.5
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.