Switching cameras based on a collider/trigger

Hi all, I am hoping someone can give me some insight on how to do the following.

I am making a lunar lander clone as a project to help me learn unity/jscript, and I want to do the following.

As my ship gets close to another object, I want to switch view from the main cam to a camera that zooms in closer to the ship, much like the original game did.

The ship has two coliders, one mesh for physics, and I added a second spherical collider, set it as triger and scaled it up so it should act like a proximity detector that would switch to the zoomed in ship-cam when the ship gets close to anything. I also want to swich back to the main cam once the ship is out of range or rather the second collider isnt colliding with anything.

I think that the OnTriggerEnter command is needed but have no clue how to use it and make the camera switch. Also any insight on how to tie the ship cam to the ship and make the cam follow the ship in y,z at a fixed distance and ignor the ship rotation (it only rotates around x) would also be very helpful

many thanks for any assistance.

 

I have been using this:

Code (csharp):

1. camera.depth = Camera.main.depth = x;

but it doesn't work consistently.

the idea behind it is that cameras with higher numbers are rendered in front of cameras with lower numbers.