Contrast ratio | 538:1 (edge: 491:1) |
---|---|
Monitor model | Sony KDL-26U2000 |
Submitted | 20 Jul 2012 14:59 CEST, by 84.248.*.* |
Camera model | Canon EOS 450D |
Processing remarks | Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. |
Black | |
Screen photo |
|
Luminance | 0.53 cd/m2 |
Luminance spread | 0.3 cd/m2 (2 standard deviations) |
Exposure value | –2.65 stops (aim for –2 to –3) |
Exposure spread | 0.83 stops |
Area used for calculation | 0.382 x 0.43 |
Camera settings | Exposure time: 0.5 ISO: 400 F-number: 2.8 Focal length: 27.5 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 287 cd/m2 |
Luminance spread | 49 cd/m2 (2 standard deviations) |
Exposure value | –1.95 stops (aim for –2 to –3) |
Exposure spread | 0.25 stops |
Area used for calculation | 0.382 x 0.43 |
Camera settings | Exposure time: 1/664 ISO: 400 F-number: 2.8 Focal length: 27.5 mm (35 mm equivalent) Exposure compensation: 0 |
Black at screen edge | |
Screen photo |
|
Luminance | 0.58 cd/m2 |
Luminance spread | 0.37 cd/m2 (2 standard deviations) |
Exposure value | –2.52 stops (aim for –2 to –3) |
Exposure spread | 0.95 stops |
Area used for calculation | 0.382 x 0.43 |
Camera settings | Exposure time: 0.5 ISO: 400 F-number: 2.8 Focal length: 27.5 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.