Contrast ratio results

Black
Contrast ratio	509:1
Monitor model
Submitted	07 Mar 2009 10:55 CET, by 89.43..
Camera model	Fujifilm FinePix F10
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 5.2 s (Set EV to +4.0) Note: image file 2: suggested exposure time: 1/99 s (Set EV to -1.5)
Screen photo	[open image]
Luminance	0.29 cd/m2
Luminance spread	0.75 cd/m2 (2 standard deviations)
Exposure value	–6.87 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.52 x 0.52
Camera settings	Exposure time: 1/4 ISO: 80 F-number: 2.8 Focal length: 36 mm (35 mm equivalent) Exposure compensation: -0.33
White
Screen photo	[open image]
Luminance	146 cd/m2
Luminance spread	18 cd/m2 (2 standard deviations)
Exposure value	–1.34 stops (aim for –2 to –3)
Exposure spread	0.18 stops
Area used for calculation	0.52 x 0.52
Camera settings	Exposure time: 1/44 ISO: 80 F-number: 2.8 Focal length: 36 mm (35 mm equivalent) Exposure compensation: -0.33

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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.