Contrast ratio | 2351:1 |
---|---|
Monitor model | Philips 220SW8 |
Submitted | 10 Apr 2009 18:14 CEST, by 77.71.*.* |
Camera model | Pentax K100D |
Processing remarks | Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. |
Black | |
Screen photo |
|
Luminance | 0.05 cd/m2 |
Luminance spread | 0.02 cd/m2 (2 standard deviations) |
Exposure value | –2.78 stops (aim for –2 to –3) |
Exposure spread | 0.63 stops |
Area used for calculation | 1 x 1 |
Camera settings | Exposure time: 0.6 ISO: 800 F-number: 1.4 Focal length: 75 mm (35 mm equivalent) Exposure compensation: 1 |
White | |
Screen photo |
|
Luminance | 119 cd/m2 |
Luminance spread | 38 cd/m2 (2 standard deviations) |
Exposure value | –2.49 stops (aim for –2 to –3) |
Exposure spread | 0.46 stops |
Area used for calculation | 1 x 1 |
Camera settings | Exposure time: 1/3200 ISO: 800 F-number: 1.4 Focal length: 75 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.