However, smartphone makers have the flexibility to make the periscope tunnel longer by slightly altering the other internal components of the phone, further increasing the optical zoom capacity in the process. This also increases the hybrid zoom output, which is significantly better than the digitally zoomed images.
If a phone has a periscope telephoto lens, it can provide a hybrid zoom range of 10X or even higher depending on the tunnel length and lens element arrangement. But a phone that has a vertically stacked fixed range telephoto lens will be limited to a smaller optical and hybrid zoom range. And at the end of the day, periscope design is what makes the crazy 100X Space Zoom on the Galaxy S20 Ultra possible.
Which phones have it?
The first phone to come equipped with a periscope telephoto lens system was the Huawei P30 Pro, and as expected, it impressed everyone with its raw image output and zooming capabilities. Samsung’s Galaxy S20 Ultra again brought the periscope cameras into the limelight.
But using periscope camera hardware in a smartphone is quite an expensive process, which is why they are limited to flagship phones only as now.