Contrast ratio results

Black
Contrast ratio	4.31151e+08:1
Monitor model
Submitted	29 May 2024 10:00 CEST, by 120.89..
Camera model	HUAWEI BTV-DL09
Processing remarks	Note: image file 1: suggested exposure time: 0.4 s (Set EV to +1.5) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 2: Overexposed. Please decrease the shutter time. Warning: Image F-number settings are not the same. Warning: Images were taken with different cameras. Warning: Image focal lengths/zoom levels are not the same.
Screen photo	[open image]
Luminance	1.67 cd/m2
Luminance spread	0.29 cd/m2 (2 standard deviations)
Exposure value	–1.03 stops (aim for –2 to –3)
Exposure spread	0.25 stops
Area used for calculation	0.704 x 0.792
Camera settings	Exposure time: 1 ISO: 400 F-number: 4 Focal length: 50.7 mm (35 mm equivalent) Exposure compensation: 3
White
Screen photo	[open image]
Luminance	7.2175e+08 cd/m2
Luminance spread	1.1636e+07 cd/m2 (2 standard deviations)
Exposure value	–0.24 stops (aim for –2 to –3)
Exposure spread	0.02 stops
Area used for calculation	0.501 x 0.282
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 2 Focal length: 26 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.