Contrast ratio results

Black
Contrast ratio	233:1
Monitor model
Submitted	15 May 2013 01:30 CEST, by 5.11..
Camera model	Nikon D5000
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: 3.2 s (Set EV to +4.0) Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/74 s (Set EV to -2.5)
Screen photo	[open image]
Luminance	0.19 cd/m2
Luminance spread	0.07 cd/m2 (2 standard deviations)
Exposure value	–6.48 stops (aim for –2 to –3)
Exposure spread	0.56 stops
Area used for calculation	0.348 x 0.531
Camera settings	Exposure time: 1/5 ISO: 800 F-number: 5.6 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	44 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–-0 stops (aim for –2 to –3)
Exposure spread	0 stops
Area used for calculation	0.358 x 0.477
Camera settings	Exposure time: 1/13 ISO: 800 F-number: 5.6 Focal length: 27 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.