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

Contrast ratio of HannsG HQ191D

Contrast ratio 933:1 (edge: 1024:1)
Monitor model HannsG HQ191D
Submitted 03 Sep 2016 17:33 CEST, by 5.187.*.*
Camera model Canon PowerShot G3
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 3: suggested exposure time: 2.2 s (Set EV to +1.1)

Black
Screen photo
[open image]
Luminance 0.15 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –3.48 stops   (aim for –2 to –3)
Exposure spread 0.44 stops
Area used for calculation 0.494 x 0.494
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 34.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 140 cd/m2
Luminance spread 37 cd/m2 (2 standard deviations)
Exposure value –2.27 stops   (aim for –2 to –3)
Exposure spread 0.39 stops
Area used for calculation 0.494 x 0.494
Camera settings Exposure time: 1/403   ISO: 400   F-number: 2.8
Focal length: 34.2 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.14 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –3.62 stops   (aim for –2 to –3)
Exposure spread 0.71 stops
Area used for calculation 0.494 x 0.494
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 34.2 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.