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

Contrast ratio of Acer V193w 75% Contrast

Contrast ratio 524:1 (edge: 343:1)
Monitor model Acer V193w 75% Contrast
Submitted 08 Jul 2020 07:33 CEST, by 222.127.*.*
Camera model Canon PowerShot G7 X Mark II
Processing remarks


Black
Screen photo
[open image]
Luminance 0.53 cd/m2
Luminance spread 0.19 cd/m2 (2 standard deviations)
Exposure value –1.66 stops   (aim for –2 to –3)
Exposure spread 0.52 stops
Area used for calculation 0.335 x 0.377
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 24.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 277 cd/m2
Luminance spread 11 cd/m2 (2 standard deviations)
Exposure value –1.28 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.335 x 0.377
Camera settings Exposure time: 1/403   ISO: 400   F-number: 2.8
Focal length: 24.1 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.81 cd/m2
Luminance spread 0.37 cd/m2 (2 standard deviations)
Exposure value –1.79 stops   (aim for –2 to –3)
Exposure spread 0.68 stops
Area used for calculation 0.335 x 0.377
Camera settings Exposure time: 0.6   ISO: 400   F-number: 2.8
Focal length: 24.1 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.