Contrast ratio results for ASUS VS247

Black
Contrast ratio	1640:1
Monitor model	ASUS VS247
Submitted	09 Aug 2014 21:10 CEST, by 216.8..
Camera model	Canon EOS REBEL T2i
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 7.7 s (Set EV to +3.0) Warning: image file 2: automatic white balance can cause inaccuracies. Warning: Image F-number settings are not the same. Warning: Image focal lengths/zoom levels are not the same.
Screen photo	[open image]
Luminance	0.06 cd/m2
Luminance spread	0.03 cd/m2 (2 standard deviations)
Exposure value	–5.45 stops (aim for –2 to –3)
Exposure spread	0.7 stops
Area used for calculation	0.393 x 0.442
Camera settings	Exposure time: 1 ISO: 400 F-number: 3.5 Focal length: 28.3 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	98 cd/m2
Luminance spread	12 cd/m2 (2 standard deviations)
Exposure value	–3.16 stops (aim for –2 to –3)
Exposure spread	0.17 stops
Area used for calculation	0.437 x 0.492
Camera settings	Exposure time: 1/64 ISO: 400 F-number: 8 Focal length: 31.5 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.