Contrast ratio results

Black
Contrast ratio	262:1 (edge: 298:1)
Monitor model
Submitted	01 Dec 2012 07:52 CET, by 101.8..
Camera model	RICOH GR DIGITAL 3
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: 0.9 s (Set EV to +1.8) 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 3: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 3: automatic white balance can cause inaccuracies. Warning: image file 3: Underexposed. Please increase the shutter time. Note: image file 3: suggested exposure time: 1.0 s (Set EV to +1.7)
Screen photo	[open image]
Luminance	0.34 cd/m2
Luminance spread	0.13 cd/m2 (2 standard deviations)
Exposure value	–4.3 stops (aim for –2 to –3)
Exposure spread	0.56 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/4 ISO: 400 F-number: 2.8 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	89 cd/m2
Luminance spread	48 cd/m2 (2 standard deviations)
Exposure value	–2.24 stops (aim for –2 to –3)
Exposure spread	0.8 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/250 ISO: 400 F-number: 2.8 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.3 cd/m2
Luminance spread	0.1 cd/m2 (2 standard deviations)
Exposure value	–4.23 stops (aim for –2 to –3)
Exposure spread	0.47 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 0.3 ISO: 400 F-number: 2.8 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.