The smaller image file, on the other hand,
demonstrates an obvious lack of image detail.
To overcome this drawback many new digital cameras
have a camera setting that allows the photographer to record the
images in "raw" format. (see "Shooting RAW
for a more detailed explanation of this format).
4. Optical vs.
In order to increase the
desirability of their product, manufacturers routinely incorporate
a digital zoom into their cameras. This feature is generally found
on compact digital "point-and-shoot" models, not the larger and more
expensive models with interchangeable lenses.
Unfortunately, digital zooms
don't really zoom closer: they merely crop a center portion
of the image and then magnify it by interpolation. The
drawback to this feature is obvious: image quality suffers.
same effect can be achieved with any photo editing software
after the picture has been taken, and generally with
better results, since a home computer has inherently greater power
and more memory than a compact camera.
The optical zoom is by far the
more important feature of the camera. With an optical zoom, the
lens maintains the same image quality throughout the magnification