Contrast ratio | 9574:1 |
---|---|
Monitor model | |
Submitted | 24 Jan 2020 19:46 CET, by 77.78.*.* |
Camera model | Canon PowerShot SX160 IS |
Processing remarks | image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. |
Black | |
Screen photo |
|
Luminance | 0.02 cd/m2 |
Luminance spread | 0.01 cd/m2 (2 standard deviations) |
Exposure value | –5.3 stops (aim for –2 to –3) |
Exposure spread | 0.81 stops |
Area used for calculation | 0.406 x 0.406 |
Camera settings | Exposure time: 4 ISO: 400 F-number: 3.5 Focal length: 28.1 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 159 cd/m2 |
Luminance spread | 26 cd/m2 (2 standard deviations) |
Exposure value | –1.76 stops (aim for –2 to –3) |
Exposure spread | 0.24 stops |
Area used for calculation | 0.406 x 0.406 |
Camera settings | Exposure time: 1/101 ISO: 400 F-number: 5 Focal length: 28.1 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.