Question:
This is a generic picture. What is the exposure time of this
photograph?
Hint:
Exiftool may be of some use.
Answer:
1/200
To
someone who knows nothing about Exif data, trying to infer an
exposure time from a photograph sounds ridiculous. However, this very
information is stored in Exif data. Exif data contains metadata about
digital cameras, smartphones, and scanners used when creating a JPG,
TIFF, or WAV file. This metadata can even sometimes include GPS
coordinates. As the hint explains, Exiftool can be used to view this
metadata (https://sno.phy.queensu.ca/~phil/exiftool/).
Run Exiftool with no parameters and path to the file.
Among
so much more information that was cut off from this screenshot, we
can see the exposure time was 1/200.
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