Contrast ratio results for LG pa75u

Black
Contrast ratio	947:1
Monitor model	LG pa75u
Submitted	27 Dec 2013 21:49 CET, by 24.52..
Camera model	Canon EOS DIGITAL REBEL
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 5.8 s (Set EV to +2.2) Note: image file 2: suggested exposure time: 1/160 s (Set EV to -1.7)
Screen photo	[open image]
Luminance	0.32 cd/m2
Luminance spread	0.02 cd/m2 (2 standard deviations)
Exposure value	–4.65 stops (aim for –2 to –3)
Exposure spread	0.1 stops
Area used for calculation	0.403 x 0.432
Camera settings	Exposure time: 1.3 ISO: 100 F-number: 3.5 Focal length: 28.6 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	303 cd/m2
Luminance spread	17 cd/m2 (2 standard deviations)
Exposure value	–0.79 stops (aim for –2 to –3)
Exposure spread	0.08 stops
Area used for calculation	0.403 x 0.432
Camera settings	Exposure time: 1/50 ISO: 100 F-number: 3.5 Focal length: 28.6 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.