A geometry node group to determine whether a vertex lies in the camera field of view. This is useful for effects like camera culling. 

Options:

• Sensor width: this is 36 by default in Blender. Leave it like this unless you change it in the camera settings and know what you're doing.

• ResX: the "Resolution X" in your scene's output settings.

• ResY: the "Resolution Y" in your scene's output settings.

• Camera focal length: The focal length specified in your camera settings. Again, this is 50 mm by default in Blender and you'll only need to change it if you change it in your camera settings.

• Include backfacing: Include faces facing away from camera. Off by default.