Contrast ratio | 877:1 |
---|---|
Monitor model | |
Submitted | 30 May 2015 00:13 CEST, by 80.222.*.* |
Camera model | Canon EOS 650D |
Processing remarks | image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. |
Black | |
Screen photo |
|
Luminance | 0.33 cd/m2 |
Luminance spread | 0.06 cd/m2 (2 standard deviations) |
Exposure value | –2.39 stops (aim for –2 to –3) |
Exposure spread | 0.26 stops |
Area used for calculation | 0.594 x 0.669 |
Camera settings | Exposure time: 1 ISO: 800 F-number: 4 Focal length: 42.8 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 286 cd/m2 |
Luminance spread | 76 cd/m2 (2 standard deviations) |
Exposure value | –0.99 stops (aim for –2 to –3) |
Exposure spread | 0.39 stops |
Area used for calculation | 0.594 x 0.669 |
Camera settings | Exposure time: 1/332 ISO: 800 F-number: 4 Focal length: 42.8 mm (35 mm equivalent) Exposure compensation: 0 |
Black at screen edge | |
Screen photo |
|
Luminance | 97 cd/m2 |
Luminance spread | 262 cd/m2 (2 standard deviations) |
Exposure value | –2.55 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.594 x 0.669 |
Camera settings | Exposure time: 1/332 ISO: 800 F-number: 4 Focal length: 42.8 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.