Contrast ratio results

Black
Contrast ratio	24:1 (edge: 24:1)
Monitor model
Submitted	27 Jun 2009 18:24 CEST, by 90.201..
Camera model	Fujifilm FinePix A203
Processing remarks	Warning: using the flash makes no sense. 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. image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 1: Overexposed. Please decrease the shutter time. Warning: using the flash makes no sense. Warning: image file 2: automatic white balance can cause inaccuracies. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 2: Overexposed. Please decrease the shutter time. Warning: using the flash makes no sense. Warning: image file 3: automatic white balance can cause inaccuracies. image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 3: Overexposed. Please decrease the shutter time. Warning: Image ISO settings are not the same. Warning: Image F-number settings are not the same. Warning: Images were taken with different cameras. Warning: Image focal lengths/zoom levels are not the same.
Screen photo	[open image]
Luminance	92 cd/m2
Luminance spread	241 cd/m2 (2 standard deviations)
Exposure value	–2.18 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/250 ISO: 400 F-number: 2.8 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	2215 cd/m2
Luminance spread	3690 cd/m2 (2 standard deviations)
Exposure value	–1.68 stops (aim for –2 to –3)
Exposure spread	3.46 stops
Area used for calculation	0.547 x 0.547
Camera settings	Exposure time: 1/169 ISO: 100 F-number: 7 Focal length: 37.9 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	91 cd/m2
Luminance spread	242 cd/m2 (2 standard deviations)
Exposure value	–2.2 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.547 x 0.547
Camera settings	Exposure time: 1/250 ISO: 400 F-number: 2.8 Focal length: 37.9 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.