Contrast ratio of Acer X223w

Black
Contrast ratio	475:1 (edge: 496:1)
Monitor model	Acer X223w
Submitted	01 Aug 2019 03:43 CEST, by 172.103..
Camera model	Canon EOS 5D Mark II
Processing remarks
Screen photo	[open image]
Luminance	0.21 cd/m2
Luminance spread	0.07 cd/m2 (2 standard deviations)
Exposure value	–3 stops (aim for –2 to –3)
Exposure spread	0.5 stops
Area used for calculation	0.325 x 0.366
Camera settings	Exposure time: 1 ISO: 800 F-number: 4 Focal length: 23.4 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	102 cd/m2
Luminance spread	28 cd/m2 (2 standard deviations)
Exposure value	–2.75 stops (aim for –2 to –3)
Exposure spread	0.4 stops
Area used for calculation	0.325 x 0.366
Camera settings	Exposure time: 1/400 ISO: 800 F-number: 4 Focal length: 23.4 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.21 cd/m2
Luminance spread	0.12 cd/m2 (2 standard deviations)
Exposure value	–3.06 stops (aim for –2 to –3)
Exposure spread	0.84 stops
Area used for calculation	0.325 x 0.366
Camera settings	Exposure time: 1 ISO: 800 F-number: 4 Focal length: 23.4 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.