Also, is there anybody clever around who knows if there's some big differences between zooming digitally, and the physical-world stuff that happens when you do it through optics?
Don't know that I qualify as clever
. but I do know a bit about optics. In the simplest terms, digital zoom basically increases
the pixel count [of a specified, smaller area] so that you can kinda, sorta zoom in -focus - on an area of the image - but you are still seeing the same image, just an enhanced area at the same pixel depth
. Optical zoom actually alters the view, so that you now see a magnified version of a much smaller image area. The digital zoom tries to accomplish what binoculars, telescopes, and macro lenses have been doing for ages. But it cannot increase what is called depth of field
. Regardless the amount of digital zoom, you still have only the pixel capability of the CCD in your particular device. Optical zoom provides a true magnification
of the given area - it is not pixel-dependent.
(This could probably have been put more clearly, but I've been lagering