| Contrast ratio | 927:1 |
|---|---|
| Monitor model | LG IPS225 |
| Submitted | 18 Sep 2012 10:29 CEST, by 97.117.*.* |
| Camera model | Pentax K10D |
| Processing remarks | Note: image file 1: suggested exposure time: 8.9 s (Set EV to +1.1) |
| Black | |
| Screen photo |
|
| Luminance | 0.09 cd/m2 |
| Luminance spread | 0.03 cd/m2 (2 standard deviations) |
| Exposure value | –3.65 stops (aim for –2 to –3) |
| Exposure spread | 0.56 stops |
| Area used for calculation | 0.472 x 0.531 |
| Camera settings | Exposure time: 4 ISO: 400 F-number: 4.5 Focal length: 34 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 80 cd/m2 |
| Luminance spread | 7 cd/m2 (2 standard deviations) |
| Exposure value | –1.7 stops (aim for –2 to –3) |
| Exposure spread | 0.13 stops |
| Area used for calculation | 0.472 x 0.531 |
| Camera settings | Exposure time: 1/60 ISO: 400 F-number: 4.5 Focal length: 34 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr022/05575a.jpg){kind=link}
![[open image]](upload/cr022/05575b.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.