| Contrast ratio | 21837:1 |
|---|---|
| Monitor model | |
| Submitted | 15 Apr 2024 20:53 CEST, by 193.34.*.* |
| Camera model | Apple iPhone 13 |
| Processing remarks | Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. |
| Black | |
| Screen photo |
|
| Luminance | 0.06 cd/m2 |
| Luminance spread | 0.01 cd/m2 (2 standard deviations) |
| Exposure value | –2.65 stops (aim for –2 to –3) |
| Exposure spread | 0.18 stops |
| Area used for calculation | 0.362 x 0.405 |
| Camera settings | Exposure time: 0.5 ISO: 1250 F-number: 1.6 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 1219 cd/m2 |
| Luminance spread | 313 cd/m2 (2 standard deviations) |
| Exposure value | –2.07 stops (aim for –2 to –3) |
| Exposure spread | 0.37 stops |
| Area used for calculation | 0.343 x 0.468 |
| Camera settings | Exposure time: 1/751 ISO: 32 F-number: 1.6 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr079/19952a.jpg){kind=link}
![[open image]](upload/cr079/19952b.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.