Contrast ratio results

Black
Contrast ratio	16400:1
Monitor model
Submitted	13 Jan 2019 17:16 CET, by 31.223..
Camera model
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 14.7 s (Set EV to +7.8) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Screen photo	[open image]
Luminance	0.01 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–10.29 stops (aim for –2 to –3)
Exposure spread	0.67 stops
Area used for calculation	0.507 x 0.38
Camera settings	Exposure time: 1/15 ISO: 400 F-number: 2.2 Focal length: 31 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	204 cd/m2
Luminance spread	16 cd/m2 (2 standard deviations)
Exposure value	–2.11 stops (aim for –2 to –3)
Exposure spread	0.12 stops
Area used for calculation	0.507 x 0.38
Camera settings	Exposure time: 1/850 ISO: 400 F-number: 2.2 Focal length: 31 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.