Contrast ratio results for U2410

Black
Contrast ratio	2021:1
Monitor model	U2410
Submitted	09 Aug 2013 09:02 CEST, by 118.209..
Camera model	htc One
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 5.2 s (Set EV to +8.7) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Screen photo	[open image]
Luminance	0.01 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–9.21 stops (aim for –2 to –3)
Exposure spread	0.34 stops
Area used for calculation	0.528 x 0.297
Camera settings	Exposure time: 1/20 ISO: 400 F-number: 1 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 2
White
Screen photo	[open image]
Luminance	15 cd/m2
Luminance spread	2 cd/m2 (2 standard deviations)
Exposure value	–1.66 stops (aim for –2 to –3)
Exposure spread	0.22 stops
Area used for calculation	0.528 x 0.297
Camera settings	Exposure time: 1/216 ISO: 400 F-number: 1 Focal length: 0 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.