Contrast ratio | 78938:1 |
---|---|
Monitor model | |
Submitted | 09 Apr 2013 09:34 CEST, by 193.64.*.* |
Camera model | Canon EOS 550D |
Processing remarks | Warning: image file 1: Underexposed. Please increase the shutter time. |
Black | |
Screen photo |
|
Luminance | 0 cd/m2 |
Luminance spread | 0 cd/m2 (2 standard deviations) |
Exposure value | –16.65 stops (aim for –2 to –3) |
Exposure spread | 2.96 stops |
Area used for calculation | 0.393 x 0.442 |
Camera settings | Exposure time: 1/166 ISO: 800 F-number: 3.5 Focal length: 28.3 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 167 cd/m2 |
Luminance spread | 14 cd/m2 (2 standard deviations) |
Exposure value | –0.38 stops (aim for –2 to –3) |
Exposure spread | 0.12 stops |
Area used for calculation | 0.393 x 0.442 |
Camera settings | Exposure time: 1/166 ISO: 800 F-number: 3.5 Focal length: 28.3 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.