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

Contrast ratio results for Kogan KAMN27QF7TA

Contrast ratio 420:1 (edge: 130:1)
Monitor model Kogan KAMN27QF7TA
Submitted 30 Jun 2020 09:32 CEST, by 117.20.*.*
Camera model Nikon D5300
Processing remarks

Warning: image file 3: Overexposed. Please decrease the shutter time.
Note: image file 3: suggested exposure time: 1/8 s (Set EV to -2.2)

Black
Screen photo
[open image]
Luminance 0.82 cd/m2
Luminance spread 0.79 cd/m2 (2 standard deviations)
Exposure value –2.04 stops   (aim for –2 to –3)
Exposure spread 1.52 stops
Area used for calculation 0.723 x 0.81
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 343 cd/m2
Luminance spread 46 cd/m2 (2 standard deviations)
Exposure value –1.29 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.723 x 0.81
Camera settings Exposure time: 1/500   ISO: 400   F-number: 2.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 2.64 cd/m2
Luminance spread 1.52 cd/m2 (2 standard deviations)
Exposure value –0.34 stops   (aim for –2 to –3)
Exposure spread 0.86 stops
Area used for calculation 0.723 x 0.81
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2.8
Focal length: 52 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.