| Contrast ratio | 4:1 |
|---|---|
| Monitor model | MacBook 15.4" late-2016 | Gamma Contrast |
| Submitted | 30 Jun 2021 13:51 CEST, by 110.54.*.* |
| Camera model | Canon EOS 80D |
| 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 | 30 cd/m2 |
| Luminance spread | 12 cd/m2 (2 standard deviations) |
| Exposure value | –3.11 stops (aim for –2 to –3) |
| Exposure spread | 0.58 stops |
| Area used for calculation | 0.389 x 0.437 |
| Camera settings | Exposure time: 1/99 ISO: 400 F-number: 3.5 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 124 cd/m2 |
| Luminance spread | 108 cd/m2 (2 standard deviations) |
| Exposure value | –3.06 stops (aim for –2 to –3) |
| Exposure spread | 1.35 stops |
| Area used for calculation | 0.389 x 0.437 |
| Camera settings | Exposure time: 1/395 ISO: 400 F-number: 3.5 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr067/16986a.jpg){kind=link}
![[open image]](upload/cr067/16986b.jpg){kind=link}
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.