Contrast ratio results

Black
Contrast ratio	387:1 (edge: 540:1)
Monitor model
Submitted	22 Apr 2023 14:44 CEST, by 143.177..
Camera model	motorola moto g8 power
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 1: automatic white balance can cause inaccuracies. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 0.9 s (Set EV to +3.6) 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: 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. Note: image file 2: suggested exposure time: 1/440 s (Set EV to +1.2) Warning: image file 3: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). 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: Underexposed. Please increase the shutter time. Note: image file 3: suggested exposure time: 1.2 s (Set EV to +4.0)
Screen photo	[open image]
Luminance	0.12 cd/m2
Luminance spread	0.07 cd/m2 (2 standard deviations)
Exposure value	–4.06 stops (aim for –2 to –3)
Exposure spread	0.86 stops
Area used for calculation	0.528 x 0.297
Camera settings	Exposure time: 0.3 ISO: 400 F-number: 1.7 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 2
White
Screen photo	[open image]
Luminance	48 cd/m2
Luminance spread	8 cd/m2 (2 standard deviations)
Exposure value	–3.69 stops (aim for –2 to –3)
Exposure spread	0.24 stops
Area used for calculation	0.528 x 0.297
Camera settings	Exposure time: 1/1001 ISO: 400 F-number: 1.7 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.09 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–4.54 stops (aim for –2 to –3)
Exposure spread	0.77 stops
Area used for calculation	0.528 x 0.297
Camera settings	Exposure time: 0.3 ISO: 400 F-number: 1.7 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 2

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.