Contrast ratio | 1248:1 (edge: 875:1) |
---|---|
Monitor model | LG 28" 4k |
Submitted | 18 Feb 2018 04:34 CET, by 73.68.*.* |
Camera model | Sony SLT-A58 |
Processing remarks | Warning: image file 1: Underexposed. Please increase the shutter time. |
Black | |
Screen photo |
|
Luminance | 0.14 cd/m2 |
Luminance spread | 0.06 cd/m2 (2 standard deviations) |
Exposure value | –4.27 stops (aim for –2 to –3) |
Exposure spread | 0.61 stops |
Area used for calculation | 1 x 1 |
Camera settings | Exposure time: 2.5 ISO: 100 F-number: 2.8 Focal length: 75 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 174 cd/m2 |
Luminance spread | 74 cd/m2 (2 standard deviations) |
Exposure value | –2.95 stops (aim for –2 to –3) |
Exposure spread | 0.62 stops |
Area used for calculation | 1 x 1 |
Camera settings | Exposure time: 1/200 ISO: 100 F-number: 2.8 Focal length: 75 mm (35 mm equivalent) Exposure compensation: 0 |
Black at screen edge | |
Screen photo |
|
Luminance | 0.2 cd/m2 |
Luminance spread | 0.23 cd/m2 (2 standard deviations) |
Exposure value | –4.08 stops (aim for –2 to –3) |
Exposure spread | 1.88 stops |
Area used for calculation | 1 x 1 |
Camera settings | Exposure time: 2 ISO: 100 F-number: 2.8 Focal length: 75 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.