Contrast ratio results for ASUS VW246H

Black
Contrast ratio	1504:1
Monitor model	ASUS VW246H
Submitted	18 Sep 2017 04:01 CEST, by 172.58..
Camera model	Canon EOS DIGITAL REBEL XTi
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 16.6 s (Set EV to +5.1) Note: image file 2: suggested exposure time: 1/90 s (Set EV to +1.1)
Screen photo	[open image]
Luminance	0.04 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–7.56 stops (aim for –2 to –3)
Exposure spread	2.2 stops
Area used for calculation	0.369 x 0.416
Camera settings	Exposure time: 0.5 ISO: 400 F-number: 4 Focal length: 26.6 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	55 cd/m2
Luminance spread	19 cd/m2 (2 standard deviations)
Exposure value	–3.64 stops (aim for –2 to –3)
Exposure spread	0.51 stops
Area used for calculation	0.369 x 0.416
Camera settings	Exposure time: 1/200 ISO: 400 F-number: 4 Focal length: 26.6 mm (35 mm equivalent) Exposure compensation: 0

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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.