Contrast ratio results

Black
Contrast ratio	13416:1
Monitor model
Submitted	03 May 2010 23:05 CEST, by 24.132..
Camera model	Panasonic DMC-TZ7
Processing remarks	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: 37.1 s (Set EV to +8.2) Warning: image file 2: automatic white balance can cause inaccuracies. Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0.01 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–10.71 stops (aim for –2 to –3)
Exposure spread	1.51 stops
Area used for calculation	0.331 x 0.442
Camera settings	Exposure time: 1/8 ISO: 400 F-number: 3.3 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	149 cd/m2
Luminance spread	91 cd/m2 (2 standard deviations)
Exposure value	–1.64 stops (aim for –2 to –3)
Exposure spread	0.91 stops
Area used for calculation	0.331 x 0.442
Camera settings	Exposure time: 1/40 ISO: 80 F-number: 3.3 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 0

{adcode}

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.