Contrast ratio results for xl2370

Black
Contrast ratio	1774:1
Monitor model	xl2370
Submitted	13 Aug 2013 20:34 CEST, by 80.117..
Camera model	Pentax K-x
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 5.2 s (Set EV to +2.4) Note: image file 2: suggested exposure time: 1/340 s (Set EV to -1.1)
Screen photo	[open image]
Luminance	0.09 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–4.88 stops (aim for –2 to –3)
Exposure spread	0.67 stops
Area used for calculation	0.375 x 0.422
Camera settings	Exposure time: 1 ISO: 800 F-number: 5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	161 cd/m2
Luminance spread	27 cd/m2 (2 standard deviations)
Exposure value	–1.41 stops (aim for –2 to –3)
Exposure spread	0.24 stops
Area used for calculation	0.375 x 0.422
Camera settings	Exposure time: 1/160 ISO: 800 F-number: 5 Focal length: 27 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.