Contrast ratio results for benqxl2411z

Black
Contrast ratio	616:1
Monitor model	benqxl2411z
Submitted	11 Jan 2019 14:24 CET, by 83.30..
Camera model	Microsoft Lumia 930
Processing remarks	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: 1.4 s (Set EV to +2.2) Warning: image file 2: automatic white balance can cause inaccuracies. Note: image file 2: suggested exposure time: 1/70 s (Set EV to -1.8) Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0.03 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–4.73 stops (aim for –2 to –3)
Exposure spread	3.47 stops
Area used for calculation	0.371 x 0.495
Camera settings	Exposure time: 0.3 ISO: 2000 F-number: 2.4 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	19 cd/m2
Luminance spread	6 cd/m2 (2 standard deviations)
Exposure value	–0.69 stops (aim for –2 to –3)
Exposure spread	0.44 stops
Area used for calculation	0.371 x 0.495
Camera settings	Exposure time: 1/20 ISO: 320 F-number: 2.4 Focal length: 28 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.