Contrast ratio | 1244:1 |
---|---|
Monitor model | |
Submitted | 06 Nov 2009 05:19 CET, by 174.44.*.* |
Camera model | Nikon D40 |
Processing remarks | Warning: image file 2: Underexposed. Please increase the shutter time. |
Black | |
Screen photo |
|
Luminance | 0.17 cd/m2 |
Luminance spread | 0.12 cd/m2 (2 standard deviations) |
Exposure value | –4.66 stops (aim for –2 to –3) |
Exposure spread | 1.14 stops |
Area used for calculation | 0.375 x 0.423 |
Camera settings | Exposure time: 1.6 ISO: 400 F-number: 5.6 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 5 |
White | |
Screen photo |
|
Luminance | 206 cd/m2 |
Luminance spread | 71 cd/m2 (2 standard deviations) |
Exposure value | –2.03 stops (aim for –2 to –3) |
Exposure spread | 0.5 stops |
Area used for calculation | 0.375 x 0.423 |
Camera settings | Exposure time: 1/125 ISO: 400 F-number: 5.6 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 5 |
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.