Telephoto lens, how does it work?

[Super Xander]

I tested out my iPhone X to see how the telephoto lens and normal camera works together.
My theory has always been, that when you zoom between x1-2 it’s the normal lens, and x2-10, it’s is the telephoto lens. Simpel is that.

But putting my finger on each lens to test it shows that the normal camera lens are used like 8/10 even at full zoom and the telephoto lens only in rare cases.
The only way I can trigger the telephoto lens by comand is with x2-6 video recording.

My question is how they work together. For sue to my test, why can the iPhone 7 then not have x10 zoom if only one lens are used? Anyone knows some secret please?

 

[Mr Kram]

normal lens is 1x zoom. telephoto lens is 2x optical zoom. anything in between is a combination between the two lens. anything over 2x up to 10x is digital zoom. typically, I only shoot with one lens or the other at normal zoom. anytime you use digital zoom, it only adds to the distortion of the photo IMHO.