Contrast ratio results for Acer VG270UP

Black
Contrast ratio	5:1
Monitor model	Acer VG270UP
Submitted	21 Mar 2020 17:06 CET, by 212.20..
Camera model	asus ZE620KL
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). 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.
Screen photo	[open image]
Luminance	25 cd/m2
Luminance spread	10 cd/m2 (2 standard deviations)
Exposure value	–3.06 stops (aim for –2 to –3)
Exposure spread	0.59 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/300 ISO: 400 F-number: 1.8 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	124 cd/m2
Luminance spread	43 cd/m2 (2 standard deviations)
Exposure value	–1.97 stops (aim for –2 to –3)
Exposure spread	0.5 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/700 ISO: 400 F-number: 1.8 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.