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

Contrast ratio results for BENQ

Contrast ratio 9744:1
Monitor model BENQ
Submitted 11 Aug 2011 21:20 CEST, by 95.73.*.*
Camera model Pentax Optio M20
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 28.7 s (Set EV to +6.8)
Note: image file 2: suggested exposure time: 1/340 s (Set EV to -1.1)
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Overexposed. Please decrease the shutter time.
Note: image file 3: suggested exposure time: 1/34 s (Set EV to -1.2)

Black
Screen photo
[open image]
Luminance 0.01 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –9.35 stops   (aim for –2 to –3)
Exposure spread 1.47 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.1
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 123 cd/m2
Luminance spread 22 cd/m2 (2 standard deviations)
Exposure value –1.42 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/160   ISO: 400   F-number: 3.1
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 12 cd/m2
Luminance spread 28 cd/m2 (2 standard deviations)
Exposure value –1.33 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/15   ISO: 400   F-number: 3.1
Focal length: 38 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.