What would be the appropriate take on making the camera retain the horizontal space despite the aspect ratio

As it seems to be the case in almost every question I create, I found the answer myself (technically, it wasn't even posted).

 static var widescreen:float=1.777777777777778;
 static var fov:float=10;
 
 function Start () {
 getFOV();
 }
 
 static function getFOV (){
         Camera.main.fieldOfView=(widescreen/Camera.main.aspect)*fov;
 }

if i'm testing it on a target 16:9 aspect ratio, I simply put the target FOV and AR declared up there. Then I just run a static function because it otherwise fails where it makes the math to change the FOV according to the new aspect ratio.

This is 100% accurate technically speaking, because widescreen/16:9 equals 1 * desired FOV. That means no changes are made.

If there's another AR like 4:3 it simply divides 1,777/(4:3) which results in 1,333*desired FOV, giving the exact same horizontal FOV, with more spacing on the top and bottom.

Guess there really was an appropriate easy solution. Of course given that I want a perfect scaling I decided to go this way, but it would be possible to make a sequence of IFs to get the known AR of the devices (16:9, 16:10, 4:3, etc), in case we want special placing of the camera or just a custom FOV.

Cheers