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

Contrast ratio results for Lenovo

Contrast ratio 165:1
Monitor model Lenovo
Submitted 13 Apr 2024 17:31 CEST, by 103.162.*.*
Camera model samsung SM-A115F
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 2.5 s (Set EV to +2.3)
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/65 s (Set EV to +2.3)

Black
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.32 cd/m2 (2 standard deviations)
Exposure value –4.85 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 0.5   ISO: 400   F-number: 1.8
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 8 cd/m2
Luminance spread 51 cd/m2 (2 standard deviations)
Exposure value –4.8 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/320   ISO: 400   F-number: 1.8
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
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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.