| Contrast ratio | 277:1 |
|---|---|
| Monitor model | hp crt |
| Submitted | 11 Dec 2012 10:16 CET, by 85.66.*.* |
| Camera model | Fujifilm A170 A180 |
| Processing remarks | Warning: image file 1: automatic white balance can cause inaccuracies. |
| Black | |
| Screen photo |
|
| Luminance | 0.11 cd/m2 |
| Luminance spread | 0.01 cd/m2 (2 standard deviations) |
| Exposure value | –3.04 stops (aim for –2 to –3) |
| Exposure spread | 0.09 stops |
| Area used for calculation | 0.462 x 0.462 |
| Camera settings | Exposure time: 8 ISO: 100 F-number: 2.9 Focal length: 32 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 30 cd/m2 |
| Luminance spread | 3 cd/m2 (2 standard deviations) |
| Exposure value | –3.93 stops (aim for –2 to –3) |
| Exposure spread | 0.12 stops |
| Area used for calculation | 0.462 x 0.462 |
| Camera settings | Exposure time: 1/64 ISO: 100 F-number: 2.9 Focal length: 32 mm (35 mm equivalent) Exposure compensation: -2 |
![[open image]](upload/cr024/06018a.jpg){kind=link}
![[open image]](upload/cr024/06018b.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.