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

Contrast ratio results

Contrast ratio 1068:1
Monitor model
Submitted 08 Dec 2019 17:12 CET, by 94.233.*.*
Camera model Canon PowerShot SX230 HS
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 23.4 s (Set EV to +2.2)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –4.73 stops   (aim for –2 to –3)
Exposure spread 2.87 stops
Area used for calculation 0.403 x 0.537
Camera settings Exposure time: 5   ISO: 100   F-number: 3.1
Focal length: 30.4 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 66 cd/m2
Luminance spread 25 cd/m2 (2 standard deviations)
Exposure value –2.9 stops   (aim for –2 to –3)
Exposure spread 0.55 stops
Area used for calculation 0.403 x 0.537
Camera settings Exposure time: 1/60   ISO: 100   F-number: 3.1
Focal length: 30.4 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.