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

Contrast ratio results

Contrast ratio 1436:1
Monitor model
Submitted 07 Nov 2014 04:45 CET, by 177.204.*.*
Camera model Sony NEX-F3
Processing remarks

Note: image file 1: suggested exposure time: 5.3 s (Set EV to +1.7)
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/17 s (Set EV to +0.8)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –1.19 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.374 x 0.424
Camera settings Exposure time: 13   ISO: 3200   F-number: 7.1
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 3
White
Screen photo
[open image]
Luminance 65 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –4.05 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.374 x 0.424
Camera settings Exposure time: 1/50   ISO: 200   F-number: 7.1
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -0.7

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.