Contrast ratio results for Insignia TV

Contrast ratio 4140:1
Monitor model Insignia TV
Submitted 28 Nov 2020 23:51 CET, by 47.156.*.*
Camera model Canon EOS DIGITAL REBEL
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 34.6 s (Set EV to +2.1)

Black
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –4.61 stops   (aim for –2 to –3)
Exposure spread 1.15 stops
Area used for calculation 0.387 x 0.436
Camera settings Exposure time: 8   ISO: 400   F-number: 3.5
Focal length: 27.9 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 55 cd/m2
Luminance spread 23 cd/m2 (2 standard deviations)
Exposure value –2.56 stops   (aim for –2 to –3)
Exposure spread 0.61 stops
Area used for calculation 0.387 x 0.436
Camera settings Exposure time: 1/125   ISO: 400   F-number: 3.5
Focal length: 27.9 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.