Contrast ratio | 1423:1 (edge: 650:1) |
---|---|
Monitor model | Dell S2340m |
Submitted | 25 Nov 2012 07:34 CET, by 209.215.*.* |
Camera model | Nikon D7000 |
Processing remarks | Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. |
Black | |
Screen photo |
|
Luminance | 0.14 cd/m2 |
Luminance spread | 0.08 cd/m2 (2 standard deviations) |
Exposure value | –3.04 stops (aim for –2 to –3) |
Exposure spread | 0.83 stops |
Area used for calculation | 0.721 x 0.816 |
Camera settings | Exposure time: 0.6 ISO: 400 F-number: 1.8 Focal length: 52 mm (35 mm equivalent) Exposure compensation: -1 |
White | |
Screen photo |
|
Luminance | 200 cd/m2 |
Luminance spread | 100 cd/m2 (2 standard deviations) |
Exposure value | –1.47 stops (aim for –2 to –3) |
Exposure spread | 0.74 stops |
Area used for calculation | 0.721 x 0.816 |
Camera settings | Exposure time: 1/800 ISO: 400 F-number: 1.8 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0 |
Black at screen edge | |
Screen photo |
|
Luminance | 0.31 cd/m2 |
Luminance spread | 0.86 cd/m2 (2 standard deviations) |
Exposure value | –2.17 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.721 x 0.816 |
Camera settings | Exposure time: 0.5 ISO: 400 F-number: 1.8 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 1 |
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.