sked/Assets/Script/Common/CameraFOV.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CameraFOV : MonoBehaviour
{
    public Camera cam;

    public Vector2 sizeScreen;
    public float FOV;

    float ratioMaking, ratioDevice;

    private void Start()
    {
        Setting();
    }

    public void Setting()
    {
        ratioMaking = (sizeScreen.x / sizeScreen.y);
        ratioDevice = ((float)Screen.width / Screen.height);

        cam.fieldOfView = FOV * ratioMaking / ratioDevice;
    }
}