| Contrast ratio | 702:1 |
|---|---|
| Monitor model | |
| Submitted | 08 Dec 2019 17:30 CET, by 94.233.*.* |
| Camera model | Canon PowerShot SX230 HS |
| 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 | 0.1 cd/m2 |
| Luminance spread | 0.08 cd/m2 (2 standard deviations) |
| Exposure value | –2.41 stops (aim for –2 to –3) |
| Exposure spread | 1.18 stops |
| Area used for calculation | 0.403 x 0.537 |
| Camera settings | Exposure time: 15 ISO: 100 F-number: 3.1 Focal length: 30.4 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 72 cd/m2 |
| Luminance spread | 29 cd/m2 (2 standard deviations) |
| Exposure value | –0.77 stops (aim for –2 to –3) |
| Exposure spread | 0.59 stops |
| Area used for calculation | 0.403 x 0.537 |
| Camera settings | Exposure time: 1/15 ISO: 100 F-number: 3.1 Focal length: 30.4 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr055/13951a.jpg){kind=link}
![[open image]](upload/cr055/13951b.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.