Contrast ratio | 1:1 |
---|---|
Monitor model | samsung sync master 940 n |
Submitted | 14 Feb 2012 01:11 CET, by 93.137.*.* |
Camera model | Sony DSLR-A350 |
Processing remarks | Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. |
Black | |
Screen photo |
|
Luminance | 222 cd/m2 |
Luminance spread | 296 cd/m2 (2 standard deviations) |
Exposure value | –1.91 stops (aim for –2 to –3) |
Exposure spread | 2.31 stops |
Area used for calculation | 1 x 1 |
Camera settings | Exposure time: 1/1000 ISO: 800 F-number: 2.8 Focal length: 75 mm (35 mm equivalent) Exposure compensation: 0.7 |
White | |
Screen photo |
|
Luminance | 226 cd/m2 |
Luminance spread | 423 cd/m2 (2 standard deviations) |
Exposure value | –1.89 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.5 x 0.562 |
Camera settings | Exposure time: 1/250 ISO: 200 F-number: 2.8 Focal length: 36 mm (35 mm equivalent) Exposure compensation: 0.7 |
Black at screen edge | |
Screen photo |
|
Luminance | 175 cd/m2 |
Luminance spread | 539 cd/m2 (2 standard deviations) |
Exposure value | –3.62 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.583 x 0.656 |
Camera settings | Exposure time: 1/640 ISO: 200 F-number: 2.8 Focal length: 42 mm (35 mm equivalent) Exposure compensation: 0.7 |
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.