Look, that is not what he asked. I hope that people will try harder to read these before giving advice that may hurt their projects.
The 45 is all you need, adjust the camera’s FOV in the inspector. If it does not match, your friend may have given you a Vertical FOV, in which case (I found by adjusting cameras in Max) the FOV you need is going to be 26.231… But I am going to make a guess that unless it’s for a sniper rifle scope, it’s going to be 45.
The lens seems to matter very little in Unity from Max… but I have noted distortion between the two at lower FOVs.