get/set camera focal length

[Tameno-01]

In a lot of cases it is better to work with camera focal length instead of FOVs. As an end user, I'd like to not have to do the following every time i want to do so

tan(deg_to_rad(camera.fov / 2.0))

It doesn't help that the camera FOV is specified in degrees, despite the rest of the engine using radians.

It's also likely it would simplify the math internally if the camera focal length was used instead of the FOV

This might be a non-issue, but i want to make this post to see whet people think.

[AThousandShips]

Isn't the FOV from focal length dependent on the size of the imaging area? What would we assume for that size? It shouldn't be a serious problem but it'd have to be documented or otherwise available to make the equation work (the equation for FOV is FOV = 2*atan(x/2*f) where x is the width of the imaging sensor or film, and f is the focal length)

[Calinou]

Setting focal lengths is already possible in the inspector since 4.0 if you enable physical camera units.