Contrast ratio | 1:1 |
---|---|
Monitor model | |
Submitted | 10 Nov 2013 09:35 CET, by 78.63.*.* |
Camera model | Pentax K100D |
Processing remarks | Warning: using the flash makes no sense. |
Black | |
Screen photo |
|
Luminance | 69 cd/m2 |
Luminance spread | 73 cd/m2 (2 standard deviations) |
Exposure value | –1.92 stops (aim for –2 to –3) |
Exposure spread | 1.71 stops |
Area used for calculation | 0.888 x 1 |
Camera settings | Exposure time: 1/60 ISO: 400 F-number: 4.5 Focal length: 64 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 87 cd/m2 |
Luminance spread | 154 cd/m2 (2 standard deviations) |
Exposure value | –2.21 stops (aim for –2 to –3) |
Exposure spread | 4.02 stops |
Area used for calculation | 1 x 1 |
Camera settings | Exposure time: 1/60 ISO: 400 F-number: 5.6 Focal length: 82 mm (35 mm equivalent) Exposure compensation: 0 |
Black at screen edge | |
Screen photo |
|
Luminance | 67 cd/m2 |
Luminance spread | 104 cd/m2 (2 standard deviations) |
Exposure value | –2.59 stops (aim for –2 to –3) |
Exposure spread | 3.01 stops |
Area used for calculation | 0.999 x 1 |
Camera settings | Exposure time: 1/60 ISO: 400 F-number: 5.6 Focal length: 72 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.