Contrast ratio results for Asus PG279Q

Black
Contrast ratio	6361:1 (edge: 2810:1)
Monitor model	Asus PG279Q
Submitted	23 Mar 2016 08:58 CET, by 121.208..
Camera model	unknown
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 8.5 s (Set EV to +6.9) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 3: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 3: Underexposed. Please increase the shutter time. Note: image file 3: suggested exposure time: 3.8 s (Set EV to +5.8)
Screen photo	[open image]
Luminance	0.02 cd/m2
Luminance spread	0.03 cd/m2 (2 standard deviations)
Exposure value	–9.4 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.528 x 0.66
Camera settings	Exposure time: 1/14 ISO: 400 F-number: 2 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	113 cd/m2
Luminance spread	22 cd/m2 (2 standard deviations)
Exposure value	–2.01 stops (aim for –2 to –3)
Exposure spread	0.28 stops
Area used for calculation	0.528 x 0.66
Camera settings	Exposure time: 1/531 ISO: 400 F-number: 2 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.04 cd/m2
Luminance spread	0.12 cd/m2 (2 standard deviations)
Exposure value	–8.32 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.528 x 0.66
Camera settings	Exposure time: 1/15 ISO: 400 F-number: 2 Focal length: 0 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.