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

Contrast ratio of PG258Q

Contrast ratio 1287:1
Monitor model PG258Q
Submitted 11 Jul 2019 01:56 CEST, by 172.98.*.*
Camera model samsung SM-G930W8
Processing remarks

Note: image file 2: suggested exposure time: 1/160 s (Set EV to -1.4)

Black
Screen photo
[open image]
Luminance 0.11 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –2.53 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 8   ISO: 50   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 138 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –1.1 stops   (aim for –2 to –3)
Exposure spread 0.08 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1/60   ISO: 50   F-number: 1.7
Focal length: 26 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.