Contrast ratio results for LG IPS236V

Black
Contrast ratio	1151:1
Monitor model	LG IPS236V
Submitted	12 Jan 2015 18:05 CET, by 108.46..
Camera model	Apple iPhone 5s
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Note: image file 1: suggested exposure time: 1.4 s (Set EV to +1.5) 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.
Screen photo	[open image]
Luminance	0.13 cd/m2
Luminance spread	0.07 cd/m2 (2 standard deviations)
Exposure value	–3.99 stops (aim for –2 to –3)
Exposure spread	0.74 stops
Area used for calculation	0.419 x 0.419
Camera settings	Exposure time: 0.5 ISO: 400 F-number: 2.2 Focal length: 29 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	150 cd/m2
Luminance spread	150 cd/m2 (2 standard deviations)
Exposure value	–1.79 stops (aim for –2 to –3)
Exposure spread	1.59 stops
Area used for calculation	0.419 x 0.419
Camera settings	Exposure time: 1/500 ISO: 400 F-number: 2.2 Focal length: 29 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.