Contrast ratio results for dell u2723qe

Black
Contrast ratio	909:1
Monitor model	dell u2723qe
Submitted	19 Nov 2022 04:46 CET, by 27.145..
Camera model	Nikon Z 6
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 1.3 s (Set EV to +3.7) Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 2: Overexposed. Please decrease the shutter time. Warning: image file 3: automatic white balance can cause inaccuracies. image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Note: image file 3: suggested exposure time: 1/370 s (Set EV to -5.2) Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	0.37 cd/m2
Luminance spread	0.4 cd/m2 (2 standard deviations)
Exposure value	–10.16 stops (aim for –2 to –3)
Exposure spread	1.72 stops
Area used for calculation	0.333 x 0.375
Camera settings	Exposure time: 1/160 ISO: 800 F-number: 5 Focal length: 24 mm (35 mm equivalent) Exposure compensation: -4
White
Screen photo	[open image]
Luminance	340 cd/m2
Luminance spread	13 cd/m2 (2 standard deviations)
Exposure value	–0.33 stops (aim for –2 to –3)
Exposure spread	0.06 stops
Area used for calculation	0.333 x 0.375
Camera settings	Exposure time: 1/160 ISO: 800 F-number: 5 Focal length: 24 mm (35 mm equivalent) Exposure compensation: -4
Black at screen edge
Screen photo	[open image]
Luminance	174 cd/m2
Luminance spread	339 cd/m2 (2 standard deviations)
Exposure value	–1.29 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.333 x 0.375
Camera settings	Exposure time: 1/160 ISO: 800 F-number: 5 Focal length: 24 mm (35 mm equivalent) Exposure compensation: -4

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.