Contrast ratio | 99:1 |
---|---|
Monitor model | |
Submitted | 24 Jan 2012 16:13 CET, by 115.143.*.* |
Camera model | Sony DSLR-A200 |
Processing remarks | Warning: image file 1: automatic white balance can cause inaccuracies. |
Black | |
Screen photo |
|
Luminance | 1.22 cd/m2 |
Luminance spread | 15.2 cd/m2 (2 standard deviations) |
Exposure value | –10.09 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.723 x 0.81 |
Camera settings | Exposure time: 1/125 ISO: 200 F-number: 5 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 122 cd/m2 |
Luminance spread | 116 cd/m2 (2 standard deviations) |
Exposure value | –2.4 stops (aim for –2 to –3) |
Exposure spread | 1.5 stops |
Area used for calculation | 0.723 x 0.81 |
Camera settings | Exposure time: 1/60 ISO: 200 F-number: 5 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0 |
Black at screen edge | |
Screen photo |
|
Luminance | 62 cd/m2 |
Luminance spread | 149 cd/m2 (2 standard deviations) |
Exposure value | –3.38 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.723 x 0.81 |
Camera settings | Exposure time: 1/60 ISO: 200 F-number: 5 Focal length: 52 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.