Contrast ratio results for banq g2420hd

Black
Contrast ratio	1963:1
Monitor model	banq g2420hd
Submitted	05 Feb 2021 22:08 CET, by 85.140..
Camera model	Nikon D3100
Processing remarks	Warning: image file 1: camera was zoomed in too much. 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: 30.4 s (Set EV to +5.9) Warning: image file 2: camera was zoomed in too much. Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/65 s (Set EV to +2.3) Warning: image file 3: camera was zoomed in too much. Warning: image file 3: automatic white balance can cause inaccuracies. image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 3: Overexposed. Please decrease the shutter time. Note: image file 3: suggested exposure time: 1/7 s (Set EV to -1.8) Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	0.02 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–8.43 stops (aim for –2 to –3)
Exposure spread	0.43 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 0.5 ISO: 400 F-number: 4 Focal length: 82 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	39 cd/m2
Luminance spread	16 cd/m2 (2 standard deviations)
Exposure value	–4.81 stops (aim for –2 to –3)
Exposure spread	0.61 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/320 ISO: 400 F-number: 4 Focal length: 82 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	4.23 cd/m2
Luminance spread	6.31 cd/m2 (2 standard deviations)
Exposure value	–0.69 stops (aim for –2 to –3)
Exposure spread	2.79 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 0.5 ISO: 400 F-number: 4 Focal length: 82 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.