Contrast ratio | 6:1 |
---|---|
Monitor model | Samsung SyncMaster 2233 |
Submitted | 14 Feb 2023 09:15 CET, by 172.116.*.* |
Camera model | Canon PowerShot A720 IS |
Processing remarks | Warning: image file 2: Overexposed. Please decrease the shutter time. |
Black | |
Screen photo |
|
Luminance | 0.26 cd/m2 |
Luminance spread | 0.1 cd/m2 (2 standard deviations) |
Exposure value | –2.67 stops (aim for –2 to –3) |
Exposure spread | 0.58 stops |
Area used for calculation | 0.495 x 0.495 |
Camera settings | Exposure time: 1 ISO: 400 F-number: 2.8 Focal length: 34.3 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 1.68 cd/m2 |
Luminance spread | 0 cd/m2 (2 standard deviations) |
Exposure value | –0 stops (aim for –2 to –3) |
Exposure spread | 0 stops |
Area used for calculation | 0.495 x 0.495 |
Camera settings | Exposure time: 1 ISO: 400 F-number: 2.8 Focal length: 34.3 mm (35 mm equivalent) Exposure compensation: 0 |
Black at screen edge | |
Screen photo |
|
Luminance | 0.36 cd/m2 |
Luminance spread | 0.3 cd/m2 (2 standard deviations) |
Exposure value | –2.21 stops (aim for –2 to –3) |
Exposure spread | 1.26 stops |
Area used for calculation | 0.495 x 0.495 |
Camera settings | Exposure time: 1 ISO: 400 F-number: 2.8 Focal length: 34.3 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.