Contrast ratio | Test results | LCD test | Small-screen tests | Lagom home

Contrast ratio results for FPT

Contrast ratio 173810:1 (edge: 297916:1)
Monitor model FPT
Submitted 12 Mar 2017 03:03 CET, by 42.113.*.*
Camera model Nokia N8-00
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 2120.9 s (Set EV to +15.0)
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 3: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 3635.3 s (Set EV to +15.7)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –17.46 stops   (aim for –2 to –3)
Exposure spread 3.79 stops
Area used for calculation 0.528 x 0.704
Camera settings Exposure time: 1/15   ISO: 100   F-number: 2.8
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 97 cd/m2
Luminance spread 34 cd/m2 (2 standard deviations)
Exposure value –3.23 stops   (aim for –2 to –3)
Exposure spread 0.52 stops
Area used for calculation 0.528 x 0.704
Camera settings Exposure time: 1/136   ISO: 100   F-number: 2.8
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –18.23 stops   (aim for –2 to –3)
Exposure spread 1.39 stops
Area used for calculation 0.528 x 0.704
Camera settings Exposure time: 1/15   ISO: 100   F-number: 2.8
Focal length: 0 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.