Contrast ratio | 1:1 |
---|---|
Monitor model | |
Submitted | 23 Apr 2014 23:25 CEST, by 83.23.*.* |
Camera model | Canon PowerShot A530 |
Processing remarks | Note: image file 2: suggested exposure time: 1/150 s (Set EV to -1.5) |
Black | |
Screen photo |
|
Luminance | 184 cd/m2 |
Luminance spread | 43 cd/m2 (2 standard deviations) |
Exposure value | –2.26 stops (aim for –2 to –3) |
Exposure spread | 0.34 stops |
Area used for calculation | 0.676 x 0.676 |
Camera settings | Exposure time: 1/101 ISO: 100 F-number: 3.2 Focal length: 46.8 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 225 cd/m2 |
Luminance spread | 36 cd/m2 (2 standard deviations) |
Exposure value | –0.96 stops (aim for –2 to –3) |
Exposure spread | 0.23 stops |
Area used for calculation | 0.676 x 0.676 |
Camera settings | Exposure time: 1/50 ISO: 100 F-number: 3.2 Focal length: 46.8 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.