Contrast ratio results

Black
Contrast ratio	773075:1
Monitor model
Submitted	17 Feb 2023 19:45 CET, by 104.28..
Camera model	Apple iPhone 11 Pro Max
Processing remarks	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: 304.9 s (Set EV to +10.6) Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/200 s (Set EV to -2.0) Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–14.84 stops (aim for –2 to –3)
Exposure spread	2.27 stops
Area used for calculation	0.501 x 0.282
Camera settings	Exposure time: 1/17 ISO: 1000 F-number: 1.8 Focal length: 26 mm (35 mm equivalent) Exposure compensation: -1.75
White
Screen photo	[open image]
Luminance	124 cd/m2
Luminance spread	5 cd/m2 (2 standard deviations)
Exposure value	–0.48 stops (aim for –2 to –3)
Exposure spread	0.06 stops
Area used for calculation	0.501 x 0.282
Camera settings	Exposure time: 1/50 ISO: 80 F-number: 1.8 Focal length: 26 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.