Contrast ratio results for LG 27GL850

Black
Contrast ratio	314:1
Monitor model	LG 27GL850
Submitted	06 Jun 2021 13:36 CEST, by 172.248..
Camera model	Sony ILCE-6000
Processing remarks	Note: image file 1: suggested exposure time: 0.4 s (Set EV to -1.6) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Screen photo	[open image]
Luminance	1.09 cd/m2
Luminance spread	0.23 cd/m2 (2 standard deviations)
Exposure value	–0.88 stops (aim for –2 to –3)
Exposure spread	0.3 stops
Area used for calculation	0.333 x 0.376
Camera settings	Exposure time: 1.3 ISO: 400 F-number: 3.5 Focal length: 24 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	344 cd/m2
Luminance spread	57 cd/m2 (2 standard deviations)
Exposure value	–3.61 stops (aim for –2 to –3)
Exposure spread	0.24 stops
Area used for calculation	0.333 x 0.376
Camera settings	Exposure time: 1/1600 ISO: 400 F-number: 3.5 Focal length: 24 mm (35 mm equivalent) Exposure compensation: 0

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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.