As previously stated the 717 has a 5X optical and a 2X electronic zoom. In the setup menu, the operator can turn OFF the 2X electonic zoom. If the 2X electonic zoom is set to ON, the camera, when zoomed to telephoto, will zoom the 5X optical first then start zooming the electronic zoom when the 5X range is exceeded.
Hope that helps.
The camera on captures the image, the photographer makes the image.