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

Contrast ratio results

Contrast ratio 1494:1 (edge: 1717:1)
Monitor model
Submitted 20 Feb 2015 19:01 CET, by 2.247.*.*
Camera model Sony NEX-5N
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 6.6 s (Set EV to +2.7)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Note: image file 2: suggested exposure time: 1/230 s (Set EV to +1.5)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 7.6 s (Set EV to +2.9)

Black
Screen photo
[open image]
Luminance 0.12 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –5.23 stops   (aim for –2 to –3)
Exposure spread 1.06 stops
Area used for calculation 0.676 x 0.902
Camera settings Exposure time: 1   ISO: 400   F-number: 4.5
Focal length: 51 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 172 cd/m2
Luminance spread 182 cd/m2 (2 standard deviations)
Exposure value –4.01 stops   (aim for –2 to –3)
Exposure spread 1.69 stops
Area used for calculation 0.676 x 0.902
Camera settings Exposure time: 1/640   ISO: 400   F-number: 4.5
Focal length: 51 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –5.43 stops   (aim for –2 to –3)
Exposure spread 1.12 stops
Area used for calculation 0.676 x 0.902
Camera settings Exposure time: 1   ISO: 400   F-number: 4.5
Focal length: 51 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.