Contrast ratio | 1197:1 |
---|---|
Monitor model | |
Submitted | 12 Oct 2016 20:50 CEST, by 107.178.*.* |
Camera model | Apple iPhone 6 |
Processing remarks | Note: image file 1: suggested exposure time: 0.7 s (Set EV to +1.4) |
Black | |
Screen photo |
|
Luminance | 0.28 cd/m2 |
Luminance spread | 0.13 cd/m2 (2 standard deviations) |
Exposure value | –3.91 stops (aim for –2 to –3) |
Exposure spread | 0.71 stops |
Area used for calculation | 0.559 x 0.314 |
Camera settings | Exposure time: 1/4 ISO: 400 F-number: 2.2 Focal length: 29 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 330 cd/m2 |
Luminance spread | 10 cd/m2 (2 standard deviations) |
Exposure value | –0.34 stops (aim for –2 to –3) |
Exposure spread | 0.04 stops |
Area used for calculation | 0.559 x 0.314 |
Camera settings | Exposure time: 1/403 ISO: 400 F-number: 2.2 Focal length: 29 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.