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

Contrast ratio results

Contrast ratio 2092:1
Monitor model
Submitted 15 Jul 2022 23:52 CEST, by 187.21.*.*
Camera model samsung SM-F415F
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 336.5 s (Set EV to +11.4)
Warning: image file 2: automatic white balance can cause inaccuracies.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 2: suggested exposure time: 0.4 s (Set EV to -1.3)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –10.89 stops   (aim for –2 to –3)
Exposure spread 0.41 stops
Area used for calculation 0.405 x 0.285
Camera settings Exposure time: 1   ISO: 160   F-number: 1.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 3
White
Screen photo
[open image]
Luminance 1.9 cd/m2
Luminance spread 0.35 cd/m2 (2 standard deviations)
Exposure value –1.19 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.496 x 0.251
Camera settings Exposure time: 1   ISO: 64   F-number: 1.8
Focal length: 24 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.