Contrast ratio | 9595:1 |
---|---|
Monitor model | Dell U2718Q |
Submitted | 07 Mar 2018 13:18 CET, by 118.148.*.* |
Camera model | Apple iPhone 6s Plus |
Processing remarks | Warning: image file 1: automatic white balance can cause inaccuracies. |
Black | |
Screen photo |
|
Luminance | 0.01 cd/m2 |
Luminance spread | 0.01 cd/m2 (2 standard deviations) |
Exposure value | –6.33 stops (aim for –2 to –3) |
Exposure spread | 0.73 stops |
Area used for calculation | 0.419 x 0.419 |
Camera settings | Exposure time: 1/4 ISO: 1600 F-number: 2.2 Focal length: 29 mm (35 mm equivalent) Exposure compensation: 1.82 |
White | |
Screen photo |
|
Luminance | 123 cd/m2 |
Luminance spread | 7 cd/m2 (2 standard deviations) |
Exposure value | –0.51 stops (aim for –2 to –3) |
Exposure spread | 0.09 stops |
Area used for calculation | 0.419 x 0.419 |
Camera settings | Exposure time: 1/17 ISO: 40 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.