Contrast ratio results for LG 27GL850

Black
Contrast ratio	540:1
Monitor model	LG 27GL850
Submitted	05 Feb 2020 21:37 CET, by 146.255..
Camera model	Sony ILCE-6000
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Note: image file 1: suggested exposure time: 0.6 s (Set EV to +1.1) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 2: automatic white balance can cause inaccuracies.
Screen photo	[open image]
Luminance	0.29 cd/m2
Luminance spread	0.13 cd/m2 (2 standard deviations)
Exposure value	–3.59 stops (aim for –2 to –3)
Exposure spread	0.67 stops
Area used for calculation	0.722 x 0.812
Camera settings	Exposure time: 0.3 ISO: 400 F-number: 2.2 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	155 cd/m2
Luminance spread	43 cd/m2 (2 standard deviations)
Exposure value	–2.74 stops (aim for –2 to –3)
Exposure spread	0.41 stops
Area used for calculation	0.722 x 0.812
Camera settings	Exposure time: 1/1000 ISO: 400 F-number: 2.2 Focal length: 52 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.