I have a Dahua IPC-HDW5231R-Z, but I would like another camera that "zooms in" a bit more than this one can (12mm is the max according to the specs). I like the Dahua turret style cameras, but I think they only offer lens options up to 6mm. Is there a way to get a camera with a lens that zooms a little farther than 12mm (preferably turret style)?