Contrast ratio results

Black
Contrast ratio	2:1
Monitor model
Submitted	06 Mar 2021 20:39 CET, by 77.191..
Camera model	Nikon D200
Processing remarks	image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 1: Overexposed. Please decrease the shutter time. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: Image F-number settings are not the same. Warning: Image focal lengths/zoom levels are not the same. Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	3848 cd/m2
Luminance spread	6173 cd/m2 (2 standard deviations)
Exposure value	–1.59 stops (aim for –2 to –3)
Exposure spread	3.19 stops
Area used for calculation	0.498 x 0.567
Camera settings	Exposure time: 1/80 ISO: 100 F-number: 13 Focal length: 36 mm (35 mm equivalent) Exposure compensation: -1
White
Screen photo	[open image]
Luminance	6113 cd/m2
Luminance spread	8209 cd/m2 (2 standard deviations)
Exposure value	–1.56 stops (aim for –2 to –3)
Exposure spread	2.35 stops
Area used for calculation	0.584 x 0.655
Camera settings	Exposure time: 1/125 ISO: 100 F-number: 13 Focal length: 42 mm (35 mm equivalent) Exposure compensation: -1
Black at screen edge
Screen photo	[open image]
Luminance	4666 cd/m2
Luminance spread	5184 cd/m2 (2 standard deviations)
Exposure value	–1.84 stops (aim for –2 to –3)
Exposure spread	1.81 stops
Area used for calculation	0.724 x 0.809
Camera settings	Exposure time: 1/100 ISO: 100 F-number: 14 Focal length: 52 mm (35 mm equivalent) Exposure compensation: -1

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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.