[Hitman]

The problem is that you have actually two things to take care of,

1) Camera aperture (The setting in the cameras.dat)

2) Periscope screen in the game

This last one is the graphic you are tweaking, and it will show the correct FOV only as long as you tune it according to the cameras aperture.

Let me explain that:

You have a rounded hole in the middle of the screen, but that hole can be bigger or smaller, you choose how much. If you make it bigger you are actually gaining field of view, so you would then have to tune the cameras.dat accordingly.

What you need to do is:

1) Decide a standard size of the hole, for all your optical views. I have chose 480 pixels in my mods, for example

2) Tweak the cameras.dat so that you set the proper aperture angle to make that 480 pixels correspond to the 32º you want to have

3) Place the reticle markings in the hole in the proper places, with 1 degree spacing in horizontal separation

4) Tweak all the other cameras apertures in cameras.dat to the same one as in your optics, so that the zoom proportions are correct. (Otherwise it could happen that at 6x zoom in your optics you see objects that are apparently only 2x what you see on the bridge)