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

Contrast ratio results for toshiba

Contrast ratio 206:1 (edge: 405:1)
Monitor model toshiba
Submitted 27 Oct 2012 03:32 CEST, by 145.118.*.*
Camera model SAMSUNG EX1
Processing remarks

Warning: image file 3: automatic white balance can cause inaccuracies.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 2.4 s (Set EV to +3.2)

Black
Screen photo
[open image]
Luminance 1.23 cd/m2
Luminance spread 2.74 cd/m2 (2 standard deviations)
Exposure value –3.28 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 0.7   ISO: 80   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
[open image]
Luminance 253 cd/m2
Luminance spread 40 cd/m2 (2 standard deviations)
Exposure value –3.05 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 1/250   ISO: 80   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.62 cd/m2
Luminance spread 1.48 cd/m2 (2 standard deviations)
Exposure value –5.75 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 1/4   ISO: 80   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
{adcode}

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.