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

Contrast ratio results for Samsung S23A700D

Contrast ratio 1709:1 (edge: 1402:1)
Monitor model Samsung S23A700D
Submitted 05 Dec 2015 18:52 CET, by 58.165.*.*
Camera model Canon EOS 70D
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 15.3 s (Set EV to +3.9)
Warning: image file 2: camera was zoomed in too much.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/110 s (Set EV to +1.8)
Warning: image file 3: camera was zoomed in too much.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 12.6 s (Set EV to +3.7)

Black
Screen photo
[open image]
Luminance 0.04 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –6.44 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1   ISO: 400   F-number: 4
Focal length: 86.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 67 cd/m2
Luminance spread 68 cd/m2 (2 standard deviations)
Exposure value –4.33 stops   (aim for –2 to –3)
Exposure spread 1.61 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/395   ISO: 400   F-number: 4
Focal length: 86.7 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –6.15 stops   (aim for –2 to –3)
Exposure spread 0.84 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1   ISO: 400   F-number: 4
Focal length: 86.7 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.