Contrast ratio results for LG 23EA63

Black
Contrast ratio	340:1
Monitor model	LG 23EA63
Submitted	29 Apr 2014 20:57 CEST, by 95.38..
Camera model	Canon PowerShot SX200 IS
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: 5.7 s (Set EV to +2.5) Warning: image file 2: automatic white balance can cause inaccuracies. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/59 s (Set EV to +2.8)
Screen photo	[open image]
Luminance	0.08 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–5.02 stops (aim for –2 to –3)
Exposure spread	0.92 stops
Area used for calculation	0.394 x 0.394
Camera settings	Exposure time: 1 ISO: 400 F-number: 3.4 Focal length: 27.3 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	26 cd/m2
Luminance spread	8 cd/m2 (2 standard deviations)
Exposure value	–5.27 stops (aim for –2 to –3)
Exposure spread	0.43 stops
Area used for calculation	0.394 x 0.394
Camera settings	Exposure time: 1/403 ISO: 400 F-number: 3.4 Focal length: 27.3 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.