Contrast ratio results for lg 27MU88-W

Black
Contrast ratio	707:1
Monitor model	lg 27MU88-W
Submitted	26 Dec 2019 20:51 CET, by 73.252..
Camera model	Apple iPhone XR
Processing remarks	image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 7.1 s (Set EV to +4.1) 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: 1/100 s (Set EV to +2.0)
Screen photo	[open image]
Luminance	0.28 cd/m2
Luminance spread	0.15 cd/m2 (2 standard deviations)
Exposure value	–6.65 stops (aim for –2 to –3)
Exposure spread	0.79 stops
Area used for calculation	0.376 x 0.376
Camera settings	Exposure time: 0.4 ISO: 25 F-number: 1.8 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	195 cd/m2
Luminance spread	45 cd/m2 (2 standard deviations)
Exposure value	–4.51 stops (aim for –2 to –3)
Exposure spread	0.34 stops
Area used for calculation	0.376 x 0.376
Camera settings	Exposure time: 1/400 ISO: 25 F-number: 1.8 Focal length: 26 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.