Contrast ratio | 3398:1 |
---|---|
Monitor model | |
Submitted | 25 Jun 2012 17:27 CEST, by 187.193.*.* |
Camera model | Nikon COOLPIX L120 |
Processing remarks | image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. |
Black | |
Screen photo |
|
Luminance | 0.07 cd/m2 |
Luminance spread | 0.04 cd/m2 (2 standard deviations) |
Exposure value | –8.54 stops (aim for –2 to –3) |
Exposure spread | 0.78 stops |
Area used for calculation | 0.323 x 0.486 |
Camera settings | Exposure time: 1/13 ISO: 400 F-number: 3.1 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 243 cd/m2 |
Luminance spread | 20 cd/m2 (2 standard deviations) |
Exposure value | –1.08 stops (aim for –2 to –3) |
Exposure spread | 0.12 stops |
Area used for calculation | 0.322 x 0.493 |
Camera settings | Exposure time: 1/250 ISO: 400 F-number: 3.1 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 0 |
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.