Contrast ratio results

Black
Contrast ratio	690:1
Monitor model
Submitted	14 Nov 2016 04:49 CET, by 24.188..
Camera model	Olympus E-M1
Processing remarks	Warning: using the flash makes no sense. Warning: image file 1: camera was zoomed in too much. Note: image file 1: suggested exposure time: 8.6 s (Set EV to -1.8) Warning: using the flash makes no sense. Warning: image file 2: camera was zoomed in too much. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Screen photo	[open image]
Luminance	0.03 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–0.7 stops (aim for –2 to –3)
Exposure spread	0.33 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 30 ISO: 400 F-number: 2.8 Focal length: 80.1 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	24 cd/m2
Luminance spread	8 cd/m2 (2 standard deviations)
Exposure value	–2.82 stops (aim for –2 to –3)
Exposure spread	0.49 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/100 ISO: 400 F-number: 2.8 Focal length: 80.1 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.