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

Contrast ratio results

Contrast ratio 171:1
Monitor model
Submitted 19 Jul 2016 12:21 CEST, by 92.242.*.*
Camera model CASIO COMPUTER CO.LTD. EX-Z120
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 1: suggested exposure time: 0.3 s (Set EV to +1.4)
Note: image file 2: suggested exposure time: 1/510 s (Set EV to -1.0)

Black
Screen photo
[open image]
Luminance 1.47 cd/m2
Luminance spread 1.22 cd/m2 (2 standard deviations)
Exposure value –3.91 stops   (aim for –2 to –3)
Exposure spread 1.28 stops
Area used for calculation 0.823 x 0.823
Camera settings Exposure time: 1/8   ISO: 400   F-number: 3.6
Focal length: 57 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 252 cd/m2
Luminance spread 47 cd/m2 (2 standard deviations)
Exposure value –1.46 stops   (aim for –2 to –3)
Exposure spread 0.27 stops
Area used for calculation 0.823 x 0.823
Camera settings Exposure time: 1/250   ISO: 400   F-number: 3.6
Focal length: 57 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.