Contrast ratio | 561:1 |
---|---|
Monitor model | asus |
Submitted | 15 Dec 2017 21:44 CET, by 93.137.*.* |
Camera model | Canon EOS 40D |
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 | 0.37 cd/m2 |
Luminance spread | 0.83 cd/m2 (2 standard deviations) |
Exposure value | –3.34 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.833 x 0.937 |
Camera settings | Exposure time: 0.6 ISO: 800 F-number: 4.6 Focal length: 60 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 208 cd/m2 |
Luminance spread | 122 cd/m2 (2 standard deviations) |
Exposure value | –3.1 stops (aim for –2 to –3) |
Exposure spread | 0.87 stops |
Area used for calculation | 0.833 x 0.937 |
Camera settings | Exposure time: 1/790 ISO: 800 F-number: 4.6 Focal length: 60 mm (35 mm equivalent) Exposure compensation: 0 |
Black at screen edge | |
Screen photo |
|
Luminance | 109 cd/m2 |
Luminance spread | 220 cd/m2 (2 standard deviations) |
Exposure value | –2.41 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.833 x 0.937 |
Camera settings | Exposure time: 1/256 ISO: 800 F-number: 4.6 Focal length: 60 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.