Contrast ratio results for EW2440L

Black
Contrast ratio	3.19142e+06:1
Monitor model	EW2440L
Submitted	20 Jun 2015 21:30 CEST, by 78.98..
Camera model	SAMSUNG SM-G130HN
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. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 97044.7 s (Set EV to +19.6) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/8 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	–22.07 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/8 ISO: 400 F-number: 2.8 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	10 cd/m2
Luminance spread	3 cd/m2 (2 standard deviations)
Exposure value	–4.5 stops (aim for –2 to –3)
Exposure spread	0.41 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/33 ISO: 100 F-number: 2.8 Focal length: 0 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.