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

Contrast ratio results for Dellâ„¢ 2407WFP-HC

Contrast ratio 130:1 (edge: 22:1)
Monitor model Dellâ„¢ 2407WFP-HC
Submitted 13 Jan 2009 23:40 CET, by 94.192.*.*
Camera model Nikon D70
Processing remarks

Note: image file 2: suggested exposure time: 1/180 s (Set EV to -0.8)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 1/8 s (Set EV to +3.6)

Black
Screen photo
[open image]
Luminance 0.63 cd/m2
Luminance spread 0.5 cd/m2 (2 standard deviations)
Exposure value –2.05 stops   (aim for –2 to –3)
Exposure spread 1.21 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
[open image]
Luminance 82 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –3.67 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -2
Black at screen edge
Screen photo
[open image]
Luminance 3.81 cd/m2
Luminance spread 26.12 cd/m2 (2 standard deviations)
Exposure value –8.1 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -2

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.