To be able to see Redshift objects and Tags in your Cinema 4D Layout and menus, be sure to have Redshift activated as your Renderer in the Render Settings!
Various types of cameras can be added directly from the Create menu. These cameras consist of a normal Cinema 4D camera and a Redshift Camera Tag.
Switching the Camera Type of a Redshift Camera Tag.
You can also manually add a Redshift Camera Tag to a standard Cinema 4D camera in the Object Manager from the Tags/Camera Tags menu.