| Contrast ratio | 769:1 |
|---|---|
| Monitor model | LG IPS234 |
| Submitted | 31 Jan 2014 23:50 CET, by 77.78.*.* |
| Camera model | Canon PowerShot SX160 IS |
| Processing remarks | image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. |
| Black | |
| Screen photo |
|
| Luminance | 0.11 cd/m2 |
| Luminance spread | 0.05 cd/m2 (2 standard deviations) |
| Exposure value | –2.53 stops (aim for –2 to –3) |
| Exposure spread | 0.67 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 | 87 cd/m2 |
| Luminance spread | 50 cd/m2 (2 standard deviations) |
| Exposure value | –1.9 stops (aim for –2 to –3) |
| Exposure spread | 0.85 stops |
| Area used for calculation | 0.407 x 0.544 |
| Camera settings | Exposure time: 1/125 ISO: 400 F-number: 3.5 Focal length: 30.7 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr029/07304a.jpg){kind=link}
![[open image]](upload/cr029/07304b.jpg){kind=link}
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.