iPhone camera app does not use tele lens

[Pag46]

Hi all,

I’m looking for help on this weird behavior of the standard camera app that puzzles me.

I have an iPhone 11 Pro Max, so 3 lenses.

Using the Apple camera app, if I take a picture on 1x, the 26mm lens is correctly used. If I switch to 2x, with my surprise the 26mm lens is still used, instead of the 52mm “tele”.

This does not happen with a third party camera app like Halide.

Below you can see some screenshots taken in the photo app, showing the image information. Normally I use heif, but I switch to jpeg in one of the many attempts I have done.

It must be something related to the camera app itself, but what?
I have disabled hdr, Live Photos, show area outside canvas, everything I could think of having an influence, but the 52mm lens is never used.

Any idea why?

 

[Pag46]

To add some more information, if I zoom to 2.1x with the camera app, the 52mm lens is used, with some cropping, to produce a 57mm apparent lens length.
What I am not able to do is to use the tele lens at its native 52mm length with the stock Camera app.