Contrast ratio results

Black
Contrast ratio	56406:1
Monitor model
Submitted	23 Jun 2026 08:17 CEST, by 161.142..
Camera model	Sony ILCE-6400
Processing remarks	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: 254.0 s (Set EV to +13.6) image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/220 s (Set EV to -2.2)
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–16.13 stops (aim for –2 to –3)
Exposure spread	2.24 stops
Area used for calculation	0.331 x 0.443
Camera settings	Exposure time: 1/50 ISO: 125 F-number: 2.8 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	211 cd/m2
Luminance spread	18 cd/m2 (2 standard deviations)
Exposure value	–0.35 stops (aim for –2 to –3)
Exposure spread	0.12 stops
Area used for calculation	0.331 x 0.443
Camera settings	Exposure time: 1/50 ISO: 125 F-number: 2.8 Focal length: 25 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.