Contrast ratio results

Black
Contrast ratio	729:1
Monitor model
Submitted	02 May 2019 21:56 CEST, by 62.205..
Camera model	Sony ILCE-7S
Processing remarks	Note: image file 1: suggested exposure time: 0.3 s (Set EV to -1.8) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: Overexposed. Please decrease the shutter time.
Screen photo	[open image]
Luminance	0.13 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–0.66 stops (aim for –2 to –3)
Exposure spread	0.42 stops
Area used for calculation	0.371 x 0.495
Camera settings	Exposure time: 1 ISO: 6400 F-number: 4 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	98 cd/m2
Luminance spread	8 cd/m2 (2 standard deviations)
Exposure value	–0.47 stops (aim for –2 to –3)
Exposure spread	0.11 stops
Area used for calculation	0.371 x 0.495
Camera settings	Exposure time: 1/640 ISO: 6400 F-number: 4 Focal length: 28 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.