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

Contrast ratio of Toshiba Satellite L750-11W

Contrast ratio 323:1
Monitor model Toshiba Satellite L750-11W
Submitted 15 Sep 2012 19:36 CEST, by 78.31.*.*
Camera model Canon PowerShot A530
Processing remarks

Note: image file 1: suggested exposure time: 0.4 s (Set EV to +1.0)

Black
Screen photo
[open image]
Luminance 0.62 cd/m2
Luminance spread 1.08 cd/m2 (2 standard deviations)
Exposure value –3.54 stops   (aim for –2 to –3)
Exposure spread 3.85 stops
Area used for calculation 0.497 x 0.497
Camera settings Exposure time: 1/5   ISO: 400   F-number: 2.6
Focal length: 34.4 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 201 cd/m2
Luminance spread 31 cd/m2 (2 standard deviations)
Exposure value –1.53 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.497 x 0.497
Camera settings Exposure time: 1/403   ISO: 400   F-number: 2.6
Focal length: 34.4 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.