Contrast ratio results for AOC 2243W

Black
Contrast ratio	1159:1
Monitor model	AOC 2243W
Submitted	08 Jan 2016 04:11 CET, by 76.95..
Camera model	Canon PowerShot SD750
Processing remarks	Warning: image file 1: camera was zoomed in too much. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 7.2 s (Set EV to +2.9) Warning: Image F-number settings are not the same. Warning: Image focal lengths/zoom levels are not the same.
Screen photo	[open image]
Luminance	0.13 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–5.35 stops (aim for –2 to –3)
Exposure spread	0.45 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1 ISO: 400 F-number: 4.9 Focal length: 103 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	145 cd/m2
Luminance spread	26 cd/m2 (2 standard deviations)
Exposure value	–1.87 stops (aim for –2 to –3)
Exposure spread	0.26 stops
Area used for calculation	0.455 x 0.606
Camera settings	Exposure time: 1/318 ISO: 400 F-number: 2.8 Focal length: 34.3 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.