This means the rear lens elements are as close as possible to the sensor, reducing the back focus distance of each lens to theminimum possible, thus achieving high resolution from edge to edge.
The 5x optical zoom also increases its power to the equivalent of 10x with the iA Zoom (Intelligent Auto Zoom) function with minimum deterioration of image quality thanks to the help of Intelligent Resolution technology.
It works because the maximum resolution of a telescope (the minimum angle apart that two points need to be for the telescope to see them as separate) depends on its diameter, not its collecting area.