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

Contrast ratio of Philips 109B7 (CRT)

Contrast ratio 11099:1
Monitor model Philips 109B7 (CRT)
Submitted 18 Jul 2010 22:29 CEST, by 84.87.*.*
Camera model Samsung Techwin KENOX S630 / Samsung S6
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: 9.6 s (Set EV to +1.3)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –3.76 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.506 x 0.506
Camera settings Exposure time: 4   ISO: 400   F-number: 1
Focal length: 35 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 44 cd/m2
Luminance spread 2 cd/m2 (2 standard deviations)
Exposure value –0.82 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.506 x 0.506
Camera settings Exposure time: 1/362   ISO: 400   F-number: 1
Focal length: 35 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.