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

Contrast ratio results for HannsG HQ191D

Contrast ratio 1007:1 (edge: 1372:1)
Monitor model HannsG HQ191D
Submitted 03 Sep 2016 17:45 CEST, by 5.187.*.*
Camera model Canon PowerShot G3
Processing remarks

Note: image file 1: suggested exposure time: 2.5 s (Set EV to +1.3)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 3.4 s (Set EV to +1.7)

Black
Screen photo
[open image]
Luminance 0.15 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –3.8 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.494 x 0.494
Camera settings Exposure time: 1   ISO: 200   F-number: 2.2
Focal length: 34.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 149 cd/m2
Luminance spread 33 cd/m2 (2 standard deviations)
Exposure value –2.48 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 0.494 x 0.494
Camera settings Exposure time: 1/403   ISO: 200   F-number: 2.2
Focal length: 34.2 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.11 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –4.25 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 0.494 x 0.494
Camera settings Exposure time: 1   ISO: 200   F-number: 2.2
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.