Contrast ratio | 258:1 |
---|---|
Monitor model | l1915s |
Submitted | 17 Mar 2011 21:52 CET, by 109.182.*.* |
Camera model | Canon EOS 400D DIGITAL |
Processing remarks | image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. |
Black | |
Screen photo |
|
Luminance | 0.31 cd/m2 |
Luminance spread | 0.05 cd/m2 (2 standard deviations) |
Exposure value | –2.38 stops (aim for –2 to –3) |
Exposure spread | 0.24 stops |
Area used for calculation | 0.39 x 0.44 |
Camera settings | Exposure time: 1.6 ISO: 400 F-number: 3.5 Focal length: 28.1 mm (35 mm equivalent) Exposure compensation: 1 |
White | |
Screen photo |
|
Luminance | 81 cd/m2 |
Luminance spread | 27 cd/m2 (2 standard deviations) |
Exposure value | –1.69 stops (aim for –2 to –3) |
Exposure spread | 0.49 stops |
Area used for calculation | 0.39 x 0.44 |
Camera settings | Exposure time: 1/100 ISO: 400 F-number: 3.5 Focal length: 28.1 mm (35 mm equivalent) Exposure compensation: 2 |
Black at screen edge | |
Screen photo |
|
Luminance | 25 cd/m2 |
Luminance spread | 51 cd/m2 (2 standard deviations) |
Exposure value | –1.4 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.39 x 0.44 |
Camera settings | Exposure time: 1/25 ISO: 400 F-number: 3.5 Focal length: 28.1 mm (35 mm equivalent) Exposure compensation: 2 |
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.