Contrast ratio results for RCA 46LA45RQ

Black
Contrast ratio	13869:1
Monitor model	RCA 46LA45RQ
Submitted	20 Jan 2012 04:10 CET, by 74.74..
Camera model	Canon EOS REBEL T3
Processing remarks	Warning: image file 1: camera was zoomed out too much. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 13.6 s (Set EV to -0.2) Warning: image file 2: camera was zoomed out too much.
Screen photo	[open image]
Luminance	0.03 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–6.27 stops (aim for –2 to –3)
Exposure spread	0.24 stops
Area used for calculation	0.1 x 0.113
Camera settings	Exposure time: 1 ISO: 400 F-number: 3.5 Focal length: 1.4 mm (35 mm equivalent) Exposure compensation: -4
White
Screen photo	[open image]
Luminance	472 cd/m2
Luminance spread	11 cd/m2 (2 standard deviations)
Exposure value	–1.51 stops (aim for –2 to –3)
Exposure spread	0.04 stops
Area used for calculation	0.1 x 0.113
Camera settings	Exposure time: 1/512 ISO: 400 F-number: 3.5 Focal length: 1.4 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.