Hi.
I use
Joy2Key program for Fov changes. I have set 2 buttons on my joystick, one for zoom out and one for zoom in.Choose a key/keys on you throttle or joystick. Select camera settings in Clod and set a key for hold to adjust field of view. Repeat that and then choose mouse emulation on Joy2Key and set those 2 keys here too. Now you can manage how much and fast you want to zoom just pressing keys on you throttle or joystick!