photos - How does the iPhone 7 plus dual camera work? - Ask Different
The iPhone 7 Plus cameras are great. Here's some unedited snaps I've taken today.
Holy crap man those are awesome! Where are you?
More on reddit.comThe iPhone 7 was THE best iphone camera.
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I did a simple test to see how this actually work by actually covering the camera in the left (the telephoto lens). I found this pattern: in low lighting the iPhone will always use the wide angle lens (on the right) and digital zoom. Other cases the iPhone will switch to the telephoto on zooms greater than 2x. The iPhone didn't switch to the telephoto when you're covering the lens is because when you cover up the wide angle lens it tricks the iPhone into thinking that it is in low lighting so it will use digital zoom instead.
You're probably just using the digital zoom and never switching cameras. You describe the zoom as "smooth" - this sounds like you're not switching cameras.
To switch between the cameras, press the "1x" circled button and it will show "2x". This is the secondary camera.
You can do digital zoom on either camera afterwards.