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Contrast ratio results for Apple Macintosh 128

Contrast ratio 264:1
Monitor model Apple Macintosh 128
Submitted 08 Jun 2019 20:18 CEST, by 24.22.*.*
Camera model Nikon 1 J5
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1/6 s (Set EV to +6.0)
Warning: image file 2: Overexposed. Please decrease the shutter time.

Black
Screen photo
[open image]
Luminance 0.76 cd/m2
Luminance spread 0.48 cd/m2 (2 standard deviations)
Exposure value –8.52 stops   (aim for –2 to –3)
Exposure spread 0.96 stops
Area used for calculation 0.687 x 0.75
Camera settings Exposure time: 1/400   ISO: 400   F-number: 1.8
Focal length: 49 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 199 cd/m2
Luminance spread 42 cd/m2 (2 standard deviations)
Exposure value –0.47 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.687 x 0.75
Camera settings Exposure time: 1/400   ISO: 400   F-number: 1.8
Focal length: 49 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.