Hello, I have a HiK DS-2CD4212FWD-IZH, this model has a motorized zoom lens. I just recently got it functioning on my LAN via my mac with safari browser. The issue I'm having is that there is no PTZ control when accessing it this way. I understand that Pan and Tilt will never work but I need the Zoom control to adjust the zoom lens. I also understand that these features are available on the iVMS 4200 for Mac software, and the IVMS 4500 app for iPhone. The trouble is I have been unsuccessful viewing the camera with either of these. My question is can I open the camera and manually adjust the zoom and focus ? And If so, will the lens hold its position if power is cycled?