| Contrast ratio | 235:1 |
|---|---|
| Monitor model | Sony CPD-G520P FD Trinitron |
| Submitted | 01 Oct 2008 12:24 CEST, by 12.214.*.* |
| Camera model | Sony DSLR-A100 |
| Processing remarks | Warning: Image ISO settings are not the same. |
| Black | |
| Screen photo |
|
| Luminance | 0.46 cd/m2 |
| Luminance spread | 0.04 cd/m2 (2 standard deviations) |
| Exposure value | –1.69 stops (aim for –2 to –3) |
| Exposure spread | 0.13 stops |
| Area used for calculation | 0.592 x 0.664 |
| Camera settings | Exposure time: 30 ISO: 1 F-number: 29 Focal length: 42.6 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 109 cd/m2 |
| Luminance spread | 10 cd/m2 (2 standard deviations) |
| Exposure value | –2.72 stops (aim for –2 to –3) |
| Exposure spread | 0.14 stops |
| Area used for calculation | 0.592 x 0.664 |
| Camera settings | Exposure time: 1 ISO: 100 F-number: 29 Focal length: 42.6 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr002/00686a.jpg){kind=link}
![[open image]](upload/cr002/00686b.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.