LEARN
ABOUT digital photography from first principles to advanced
techniques.
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Before you buy: Make sure you buy the camera which is best
for you. go there . . . |
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Perfect pictures: Getting the most out of your camera, and
taking memorable photographs.
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Print Options: The choices - from pixels to paper.
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Storage media and sharing your photos. go there . . . |
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EXIF
Explaining the hidden information stored in your digital
photographs
One of the extremely useful features of digital photography is EXIF
information. EXchangeable Image File data is text-based information embedded
invisibly in your image file.
Although not universal, a large number of cameras are exif-enabled and
it is well worth checking yours. The data stored can give you valuable
information about your photograph and is also useful to some cataloguing
software.
Most leading image-editing software will handle the exif data, making
it available for you to view, but you should also be aware that it can
easily be deleted by non-compliant software or by certain image editing.
Some of the most
useful kept in the exif information is:
• Date and time of the photograph
• The exposure program used by the camera
• The metering mode used
• Any exposure compensation applied
• Compression method, e.g. which jpeg quality
• The white balance setting
• The metering mode in use
Preserving your exif data is another good reason for keeping a secure
copy of the original of all your photographs, for instance on CD or DVD.
If you lose the data in the future it will always be with the original.
Keeping the original intact is always good practice becuase:
1. Your attempts to improve a picture may go wrong and you might inadvertently
make it worse,
2. No matter how please you might be with your efforts you may learn better
ways to improve it later, or newer software and techniques can offer better
alternatives to what you have done
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