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

Contrast ratio results

Contrast ratio 1692:1
Monitor model
Submitted 20 Feb 2015 07:55 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: 8.6 s (Set EV to +3.1)
Note: image file 3: suggested exposure time: 1/200 s (Set EV to +1.0)
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
[open image]
Luminance 0.11 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –5.61 stops   (aim for –2 to –3)
Exposure spread 0.82 stops
Area used for calculation 0.53 x 0.708
Camera settings Exposure time: 1   ISO: 400   F-number: 5
Focal length: 40 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 185 cd/m2
Luminance spread 195 cd/m2 (2 standard deviations)
Exposure value –2.88 stops   (aim for –2 to –3)
Exposure spread 1.68 stops
Area used for calculation 0.53 x 0.708
Camera settings Exposure time: 1/400   ISO: 400   F-number: 4
Focal length: 40 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 151 cd/m2
Luminance spread 337 cd/m2 (2 standard deviations)
Exposure value –3.52 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.716 x 0.955
Camera settings Exposure time: 1/400   ISO: 400   F-number: 4.5
Focal length: 54 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.