Contrast ratio | 2:1 |
---|---|
Monitor model | |
Submitted | 09 Jul 2011 13:59 CEST, by 86.185.*.* |
Camera model | Canon EOS 550D |
Processing remarks | Warning: image file 1: camera was zoomed in too much. |
Black | |
Screen photo |
|
Luminance | 3556 cd/m2 |
Luminance spread | 5724 cd/m2 (2 standard deviations) |
Exposure value | –1.62 stops (aim for –2 to –3) |
Exposure spread | 3.21 stops |
Area used for calculation | 1 x 0.5 |
Camera settings | Exposure time: 1/200 ISO: 100 F-number: 8 Focal length: 87 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 8388 cd/m2 |
Luminance spread | 13720 cd/m2 (2 standard deviations) |
Exposure value | –1.3 stops (aim for –2 to –3) |
Exposure spread | 3.32 stops |
Area used for calculation | 1 x 0.802 |
Camera settings | Exposure time: 1/200 ISO: 400 F-number: 22 Focal length: 154 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.