Contrast ratio | 876:1 |
---|---|
Monitor model | t420s |
Submitted | 13 Jun 2014 08:42 CEST, by 124.148.*.* |
Camera model | Canon EOS 550D |
Processing remarks | Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). |
Black | |
Screen photo |
|
Luminance | 0.22 cd/m2 |
Luminance spread | 0.3 cd/m2 (2 standard deviations) |
Exposure value | –6.97 stops (aim for –2 to –3) |
Exposure spread | 2.36 stops |
Area used for calculation | 0.528 x 0.593 |
Camera settings | Exposure time: 1/4 ISO: 400 F-number: 5.7 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 193 cd/m2 |
Luminance spread | 25 cd/m2 (2 standard deviations) |
Exposure value | –3.83 stops (aim for –2 to –3) |
Exposure spread | 0.18 stops |
Area used for calculation | 0.528 x 0.593 |
Camera settings | Exposure time: 1/395 ISO: 400 F-number: 5.7 Focal length: 0 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.