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

Contrast ratio results for HP

Contrast ratio 1687:1
Monitor model HP
Submitted 04 Jan 2009 06:27 CET, by 97.114.*.*
Camera model SANYO Electric Co.Ltd. 503
Processing remarks

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: 5.9 s (Set EV to +2.6)

Black
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –5.06 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 0.521 x 0.521
Camera settings Exposure time: 1   ISO: 200   F-number: 2.8
Focal length: 36.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 169 cd/m2
Luminance spread 17 cd/m2 (2 standard deviations)
Exposure value –1.98 stops   (aim for –2 to –3)
Exposure spread 0.14 stops
Area used for calculation 0.521 x 0.521
Camera settings Exposure time: 1/199   ISO: 200   F-number: 2.8
Focal length: 36.1 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.