Contrast ratio results for VG27AQ

Black
Contrast ratio	1655:1
Monitor model	VG27AQ
Submitted	27 Jun 2021 01:04 CEST, by 24.17..
Camera model	samsung SM-G892A
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Note: image file 1: suggested exposure time: 0.6 s (Set EV to +1.3) Warning: image file 2: automatic white balance can cause inaccuracies. Note: image file 2: suggested exposure time: 1/210 s (Set EV to -1.8) Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0.05 cd/m2
Luminance spread	0.08 cd/m2 (2 standard deviations)
Exposure value	–3.85 stops (aim for –2 to –3)
Exposure spread	2.59 stops
Area used for calculation	0.334 x 0.515
Camera settings	Exposure time: 1/4 ISO: 1250 F-number: 1.7 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	91 cd/m2
Luminance spread	29 cd/m2 (2 standard deviations)
Exposure value	–0.71 stops (aim for –2 to –3)
Exposure spread	0.46 stops
Area used for calculation	0.334 x 0.515
Camera settings	Exposure time: 1/60 ISO: 100 F-number: 1.7 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.