Contrast ratio results

Black
Contrast ratio	9747:1
Monitor model
Submitted	04 Jul 2020 23:27 CEST, by 5.203..
Camera model	LG Electronics LG-H930
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 12.9 s (Set EV to +6.3) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/130 s (Set EV to +0.2) Warning: image file 3: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: Image ISO settings 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	0.01 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–10.83 stops (aim for –2 to –3)
Exposure spread	0.62 stops
Area used for calculation	0.528 x 0.396
Camera settings	Exposure time: 1/25 ISO: 300 F-number: 1.6 Focal length: 0 mm (35 mm equivalent) Exposure compensation: -2
White
Screen photo	[open image]
Luminance	98 cd/m2
Luminance spread	10 cd/m2 (2 standard deviations)
Exposure value	–4.73 stops (aim for –2 to –3)
Exposure spread	0.14 stops
Area used for calculation	0.528 x 0.396
Camera settings	Exposure time: 1/593 ISO: 50 F-number: 1.6 Focal length: 0 mm (35 mm equivalent) Exposure compensation: -2
Black at screen edge
Screen photo	[open image]
Luminance	53 cd/m2
Luminance spread	5 cd/m2 (2 standard deviations)
Exposure value	–2.37 stops (aim for –2 to –3)
Exposure spread	0.13 stops
Area used for calculation	0.528 x 0.396
Camera settings	Exposure time: 1/250 ISO: 200 F-number: 1.6 Focal length: 0 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.