Contrast ratio | 87:1 |
---|---|
Monitor model | |
Submitted | 20 Nov 2009 08:22 CET, by 122.163.*.* |
Camera model | Nikon D90 |
Processing remarks | Warning: image file 1: Underexposed. Please increase the shutter time. |
Black | |
Screen photo |
|
Luminance | 0.25 cd/m2 |
Luminance spread | 0.39 cd/m2 (2 standard deviations) |
Exposure value | –5.65 stops (aim for –2 to –3) |
Exposure spread | 3.11 stops |
Area used for calculation | 0.477 x 0.477 |
Camera settings | Exposure time: 1/4 ISO: 400 F-number: 3.8 Focal length: 33 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 21 cd/m2 |
Luminance spread | 20 cd/m2 (2 standard deviations) |
Exposure value | –5.86 stops (aim for –2 to –3) |
Exposure spread | 1.43 stops |
Area used for calculation | 0.477 x 0.477 |
Camera settings | Exposure time: 1/400 ISO: 400 F-number: 3.8 Focal length: 33 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.