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

Contrast ratio results

Contrast ratio 4945:1
Monitor model
Submitted 21 Nov 2009 19:16 CET, by 79.166.*.*
Camera model Nikon D300
Processing remarks

Warning: image file 1: camera was zoomed in too much.
image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 20.1 s (Set EV to +4.3)
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Note: image file 2: suggested exposure time: 1/380 s (Set EV to -1.2)
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0.01 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –6.83 stops   (aim for –2 to –3)
Exposure spread 0.47 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1   ISO: 3   F-number: 5.6
Focal length: 202 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 36 cd/m2
Luminance spread 4 cd/m2 (2 standard deviations)
Exposure value –1.25 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.416 x 0.47
Camera settings Exposure time: 1/160   ISO: 3   F-number: 4.5
Focal length: 30 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.