Is anyone still watching this thread? I'm looking for some advice for soffit installs. I want to either use standard generic white round junction boxes or double gang boxes. It seems most people forget that their cameras aren't going to last them a lifetime and they'll need to be replaced at some point, and it could be with an entirely different brand with different mounting holes required, where these people will end up with a honeycomb of holes eventually. My plan is to use standard white metal junction boxes, or double gang boxes. When I want to swap the cameras out, all I'll need to do is at worst, buy new standard generic weatherproof cover plates to screw the cameras onto. I'll have a hole in the back of the junction or gang and through the soffit just large enough to squeeze cat5e through into the attic.
Is there any reason to use a round junction box over a rectangular gang box?
Also, my soffits are at a 20 degree angle along with the roof, but it looks like with any 3-axis eyeball type turret camera, that should not pose an issue.
Many of us use a piece or two of aluminum stock and secure the camera to it and waterproof the connection and shove it up in the soffit.