Contrast ratio results

Black
Contrast ratio	7877:1
Monitor model
Submitted	28 May 2024 14:16 CEST, by 176.205..
Camera model	samsung Galaxy A05
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: 0.8 s (Set EV to +3.3) Warning: image file 2: automatic white balance can cause inaccuracies. Note: image file 2: suggested exposure time: 1/130 s (Set EV to -1.3) Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0.03 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–5.83 stops (aim for –2 to –3)
Exposure spread	0.75 stops
Area used for calculation	0.292 x 0.389
Camera settings	Exposure time: 1/13 ISO: 2500 F-number: 1.9 Focal length: 22 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	223 cd/m2
Luminance spread	17 cd/m2 (2 standard deviations)
Exposure value	–1.2 stops (aim for –2 to –3)
Exposure spread	0.11 stops
Area used for calculation	0.292 x 0.389
Camera settings	Exposure time: 1/53 ISO: 32 F-number: 1.9 Focal length: 22 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.