| Contrast ratio | 298:1 |
|---|---|
| Monitor model | Zalman ZM-M240W |
| Submitted | 20 Jul 2010 09:48 CEST, by 71.117.*.* |
| Camera model | Canon EOS DIGITAL REBEL |
| Processing remarks | Note: image file 2: suggested exposure time: 1/170 s (Set EV to +1.2) |
| Black | |
| Screen photo |
|
| Luminance | 0.67 cd/m2 |
| Luminance spread | 0.75 cd/m2 (2 standard deviations) |
| Exposure value | –1.64 stops (aim for –2 to –3) |
| Exposure spread | 1.81 stops |
| Area used for calculation | 0.453 x 0.509 |
| Camera settings | Exposure time: 3.2 ISO: 400 F-number: 5.6 Focal length: 32.6 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 201 cd/m2 |
| Luminance spread | 40 cd/m2 (2 standard deviations) |
| Exposure value | –3.74 stops (aim for –2 to –3) |
| Exposure spread | 0.29 stops |
| Area used for calculation | 0.453 x 0.509 |
| Camera settings | Exposure time: 1/400 ISO: 400 F-number: 5.6 Focal length: 32.6 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr011/02997a.jpg){kind=link}
![[open image]](upload/cr011/02997b.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.