3.4mm No Distortion Lens for GoPro 7 Hero Black

I think using GoPros for 3D is pretty cool. 

My biggest issue is that I don't want the ultra wide fisheye look.  

Yes, you can defish the video in editing or record in LINEAR mode and save a lot of money but I was looking at other options.

One option is to swap out the lenses on the GoPro. Earlier GoPros use m12 lenses?

(Newer GoPros make this impossible without a spendy conversion--which means you might as well have bought a proper camera).

The GoPro 7 Hero Black lenses unscrew right off so I searched the web and found that the 8K production Store on AliExpress has a 3.4mm no distortion lens for GoPro 7 Hero Black.

The biggest issue after installation is to set focus. (You only have to do this once).

You have to connect the GoPro via HDMI to a monitor and slow focus the lens. Once dialed in, that's it.

Here's a link to the item.  (Not an affliate link. I spent my own money on the lenses)

https://www.aliexpress.us/item/2251832651080330.html?spm=a2g0o.order_list.order_list_main.5.36fd1802XRHmgr&gatewayAdapt=glo2usa

Another option was to buy an action camera with a no distortion 90 degree lens.

The Firefly 8se with the 90 degree lens seems like it would do the trick.