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

Contrast ratio results for Dell 2407WFP-HC

Contrast ratio 25:1
Monitor model Dell 2407WFP-HC
Submitted 09 Dec 2011 21:58 CET, by 85.121.*.*
Camera model Canon PowerShot SX230 HS
Processing remarks

Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/22 s (Set EV to -2.5)

Black
Screen photo
[open image]
Luminance 0.33 cd/m2
Luminance spread 0.2 cd/m2 (2 standard deviations)
Exposure value –2.98 stops   (aim for –2 to –3)
Exposure spread 0.91 stops
Area used for calculation 0.403 x 0.403
Camera settings Exposure time: 0.8   ISO: 400   F-number: 3.1
Focal length: 27.9 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 8 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –0.01 stops   (aim for –2 to –3)
Exposure spread 0 stops
Area used for calculation 0.403 x 0.403
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.1
Focal length: 27.9 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.