Optical zoom is way better than digital zoom as digital only expands the picture. Optical zoom actually zooms in.
Optical Zoom is the true zoom, Digital is basically the zoom in of what the highest optical zoom is. Therefore Optical Zoom is the better zoom, and gives a much clearer picture.
zoom is to enlarge the image and capture in a digital camera
The Cannon Powershot has both and optical and digital zoom features. Optical zoom is far superior to digital zoom.
A optical zoom use the lenses to focus in on a subject, pretty much the same way binoculars work. Digital zoom magnifies the subject by enlarging in in the pic thru a digital process, this is not a true type of zoom.
Digital zoom uses software to zoom in further than regular optical zoom, which uses lenses to magnify the picture.
There is no limit for the zoom of a camera, but the The 26X Longest Zoom Digital Camera is one of the longest zoom cameras on the market. But you can always buy a longer zoom for a camera that does not have one .
3x optical zoom and 5x digital zoom are standard features on most mid-range pocket digital cameras. A better optical zoom capability would be 6x or 8x optical. The digital zoom capability can be ignored, since all it does is crop and expand your image, necessarily reducing its resolution. Digital zoom may be handy for giving you a close-up view in the viewfinder or on the viewscreen, but the photographer must remember that picture quality shot with digital zoom may be compromised. POOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOP U:P
Some newer models have 18x zoom, but 10x is typical for most extended zoom digital cameras.
The reason an optical zoom is better to have than a digital zoom boils down to quality. When one uses an optical zoom the subject is brought in closer without losing quality. When a digital zoom is used, the camera crops and digitally enlarges the picture, sacrificing quality.
I usually see anywhere from 6x to 12x optical zoom, then most digital cameras also have digital zoom, up to about 20x
350 is bigger than 160. But you should look for optical zoom. Digital zoom at even about 30x gets so blurry and horrible.