The Fuji S700, has both the Optical Zoom as well as the Digital Zoom. The Optical Zoom is 10 times, while the Digital Zoom is 5 times. This if use collectively work out to 50 times zoom, which mean an object 100 feet away will look just 2 feet away. That is the theory.
Realistically if you use more than 2x Digital Zoom you cannot get a "OK" picture, as when you digitally zoom, the photo breaks up or pixalize. Below are some shots taken at a Golf Course to demonstrate this. Control the zoom with the lever at the shuttle button.
Zoom is useful to compose Photographs.......
Photo No Zoom
Photo with X 5 Optical Zoom
Photo 10 x Optical Zoom
Photo 10 X Optical with 2 X Digital= 20 X Zoom Total, Image Still Ok.
Photo 10 X Optical, with 5 X Digital Zoom= 50 X Zoom Total
In this Last Picture, you can make things out, but the image is not good.