Camera upgrade assistance

Hi guys,

Ive read through plenty of topics on this forum, and still I am a bit confused.

Im interested in setting up a secondary camera on my br2.

Im after a camera with high resolution, which Im able to stream to my computer. And it needs to have the option to zoom.

Anyone who can asist me?
Whats the easiest way of getting this done?

Additional, i would maybe prefer to have a third camera for reat teather control. Ive looked into explorehd cameras, but there might be better options out there.

Would really appriciate a explanation, due to the fact that Im not too clued up on this kind of stuff.

All answers Are highly appriciated. Thanks