Contrast ratio | 212890:1 |
---|---|
Monitor model | |
Submitted | 16 Aug 2015 10:06 CEST, by 60.5.*.* |
Camera model | Canon PowerShot S5 IS |
Processing remarks | Warning: image file 1: Underexposed. Please increase the shutter time. |
Black | |
Screen photo |
|
Luminance | 0 cd/m2 |
Luminance spread | 0 cd/m2 (2 standard deviations) |
Exposure value | –10.94 stops (aim for –2 to –3) |
Exposure spread | 1.34 stops |
Area used for calculation | 0.513 x 0.513 |
Camera settings | Exposure time: 9.9 ISO: 200 F-number: 2.7 Focal length: 35.5 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 34 cd/m2 |
Luminance spread | 2 cd/m2 (2 standard deviations) |
Exposure value | –1.87 stops (aim for –2 to –3) |
Exposure spread | 0.07 stops |
Area used for calculation | 0.513 x 0.513 |
Camera settings | Exposure time: 1/40 ISO: 200 F-number: 2.7 Focal length: 35.5 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.