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

Contrast ratio of Lenovo Legion Y740 17" 1080p Laptop Moni

Contrast ratio 780:1
Monitor model Lenovo Legion Y740 17" 1080p Laptop Moni
Submitted 09 Sep 2020 23:38 CEST, by 24.21.*.*
Camera model samsung SM-G975U
Processing remarks

Note: image file 1: suggested exposure time: 0.7 s (Set EV to +1.4)

Black
Screen photo
[open image]
Luminance 0.32 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –3.94 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.4
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 250 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –0.78 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1/350   ISO: 400   F-number: 2.4
Focal length: 26 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.