EXIF is metadata that is added to an image or other media file during its creation. Used to store date, time, camera number, GPS data, author name, and so on. It can be used in a photo lab when printing a photo, as well as to protect copyright for an image.
Where does EXIF come from
Cameras add EXIF to the file as it is created. Parameters such as author name, copyright, and comment box can be manually set via the camera menu. In EXIF, when processing a file, data can be added or deleted. Programs like Lightroom can clear the EXIF data field altogether when converting a file between formats. The camera usually records the following data:
File creation date and time
Authorship (both author name and copyright)
Serial number of the camera
Exposure data (shutter speed, aperture)
Lens focal length
and many others.
Viewing EXIF parameters in Windows is easy, just open the file properties and go to the Details tab.
In this case, you will not be able to view all the parameters - for some reason, Windows thinks that they will be enough for us. There is nothing in this information about the lens model. A slightly more complete picture will be provided by the Metadata subsection in the Library section of the Adobe Photoshop Lightroom program.
EXIF can also be viewed through the camera menu - on Canon 60D, for example, the Info button is responsible for this during playback.
Viewing an EXIF image while viewing it, on the Internet is available on the Yandex.Photos portal, 500px, and many other photo galleries, often when uploading a photo, information about the image is taken from the file automatically and is available for display by default.
In Internet browsers, the EXIF display function for an arbitrary image is enabled by installing add-ons in the browser itself.
How to use EXIF
EXIF can be used both for copyright protection of an image, and simply to view exposure data (to remember for yourself, or to demonstrate as an example).