Contrast ratio | 1376:1 |
---|---|
Monitor model | LG IPS236V |
Submitted | 12 Jan 2015 17:57 CET, by 108.46.*.* |
Camera model | Apple iPhone 5s |
Processing remarks | Warning: image file 1: automatic white balance can cause inaccuracies. |
Black | |
Screen photo |
|
Luminance | 0.13 cd/m2 |
Luminance spread | 0.08 cd/m2 (2 standard deviations) |
Exposure value | –4.97 stops (aim for –2 to –3) |
Exposure spread | 0.96 stops |
Area used for calculation | 0.419 x 0.419 |
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 | 181 cd/m2 |
Luminance spread | 86 cd/m2 (2 standard deviations) |
Exposure value | –1 stops (aim for –2 to –3) |
Exposure spread | 0.7 stops |
Area used for calculation | 0.419 x 0.419 |
Camera settings | Exposure time: 1/350 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.