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

Contrast ratio of Apple Cinema HD Display (early 2006)

Contrast ratio 323:1
Monitor model Apple Cinema HD Display (early 2006)
Submitted 11 Jan 2018 20:58 CET, by 141.2.*.*
Camera model Canon EOS 550D
Processing remarks

Note: image file 1: suggested exposure time: 0.3 s (Set EV to -1.7)

Black
Screen photo
[open image]
Luminance 0.96 cd/m2
Luminance spread 0.16 cd/m2 (2 standard deviations)
Exposure value –0.8 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.524 x 0.589
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 37.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 310 cd/m2
Luminance spread 70 cd/m2 (2 standard deviations)
Exposure value –1.09 stops   (aim for –2 to –3)
Exposure spread 0.33 stops
Area used for calculation 0.524 x 0.589
Camera settings Exposure time: 1/395   ISO: 400   F-number: 2.8
Focal length: 37.7 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.