Contrast ratio results

Black
Contrast ratio	110:1
Monitor model
Submitted	13 Jun 2017 12:37 CEST, by 118.169..
Camera model	Nikon D50
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. 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. Note: image file 1: suggested exposure time: 1/18 s (Set EV to -1.2) Warning: image file 2: automatic white balance can cause inaccuracies. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/340 s (Set EV to -1.5) Warning: Image ISO settings are not the same. Warning: Image F-number settings are not the same. Warning: Image focal lengths/zoom levels are not the same.
Screen photo	[open image]
Luminance	11 cd/m2
Luminance spread	14 cd/m2 (2 standard deviations)
Exposure value	–1.34 stops (aim for –2 to –3)
Exposure spread	2.38 stops
Area used for calculation	0.222 x 0.251
Camera settings	Exposure time: 1/8 ISO: 800 F-number: 5.6 Focal length: 16 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	1167 cd/m2
Luminance spread	860 cd/m2 (2 standard deviations)
Exposure value	–1.05 stops (aim for –2 to –3)
Exposure spread	1.12 stops
Area used for calculation	0.333 x 0.376
Camera settings	Exposure time: 1/125 ISO: 400 F-number: 9.5 Focal length: 24 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.