We hear so much about EXIF data, but not many people know how useful having the EXIF data can be.
I remember a time back in the film camera days, when the cameras imprinted the time and date onto the photo. At the time this was a handy way to know when a photo was taken. The problem was that if the camera's date was wrong (and usually it was), so was your picture. And more importantly, there was this awful date imprinted on your lovely photo!
With digital cameras, this has all changed. On each and every shot, the camera records not only the date and time, but all the other camera settings used to record the photo. That includes the shutter speed, aperture setting, ISO setting, is the flash was used, the focal length and lots lots more.
This is stored with the photo in what is called EXIF data inside your jpeg file (not technically correct, as EXIF is actually a file format, but it's good enough for our discussion). When you copy the image to your computer, the EXIF data is copied as well, as a part of the image.
EXIF Shot Information
As Flickr, and my Digital Photo Gallery among others display EXIF data (if available) alongside the photo. Looking at this camera shot data as well as the image can give you lots of insights as to how different camera settings affect photo characteristics.
In fact the pro photographers reviewing photos for my often look at the EXIF data to help them know what the camera did, and thus what changes can be made to make an image better.
Pay particular attention to the Shutter Speed, Aperture (F-Stop), and ISO. You'll quickly start to learn how each of these values affect a photo in different lighting conditions. If looking at other people's photos, pay attention to the type of camera used as well. Most of the time you'll be surprised at how great photos with Point and Shoot cameras are!
Have you learned anything from the EXIF data? Tell me what in the comments below.
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