Contrast ratio | 208:1 |
---|---|
Monitor model | |
Submitted | 14 Jul 2011 20:15 CEST, by 67.164.*.* |
Camera model | Canon EOS DIGITAL REBEL XSi |
Processing remarks | Note: image file 2: suggested exposure time: 1/100 s (Set EV to -1.0) |
Black | |
Screen photo |
|
Luminance | 0.74 cd/m2 |
Luminance spread | 0.03 cd/m2 (2 standard deviations) |
Exposure value | –1.56 stops (aim for –2 to –3) |
Exposure spread | 0.06 stops |
Area used for calculation | 0.133 x 0.15 |
Camera settings | Exposure time: 4 ISO: 400 F-number: 6.4 Focal length: 9.6 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 155 cd/m2 |
Luminance spread | 3 cd/m2 (2 standard deviations) |
Exposure value | –1.47 stops (aim for –2 to –3) |
Exposure spread | 0.02 stops |
Area used for calculation | 0.133 x 0.15 |
Camera settings | Exposure time: 1/49 ISO: 400 F-number: 6.4 Focal length: 9.6 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.