I want to start manufacturing my own line of CCTV Cameras

May I suggest you devote more time to a game plan?

You have not given much information at all about your intended goal...

As for water proof it all depends on the application, a plastic bag might work well in some applications while a highly developed plastic or metal container might work well in others... And there is the in between where a over the counter project box might be perfect...

 

Sounds like you are trying to reinvent the wheel here, there are plenty of cheap security cameras out there that are waterproof

If you are dead set on getting this off the ground though, I would say start with the electronics and get that working

Next see if you even need a lens/telescopic lens (unless you want to make them remote controllable) or just a clear shield for easy cleaning.

Finally now worry about the packaging, you can always find some packaging to fit your circuitry but you cannot always fit your circuity to fit your packaging. Not easily anyways.

 

The term "Water Proof" means different things to different people. As an old scuba diver water proof meant good to 300 meters. This is the depth my old dive watch was guaranteed to. No, I've never been below 175 feet.

As others have said, you seem to be engineering this backward.