What is the case of your camera made out of?
If it is metal, I would attempt soldering aluminum pins to the camera to make it look like the lowercase T. Then you can braze/weld the other end of the pin to a nut, and you can drill holes in the Pipe, drop a bolt through the hole, and screw it through the nut, before securing it on the other side. use Epoxy and whatnot around the seals to waterproof it, and you'll be good to go.
If it is NOT metal, I would suggest the same approach, but instead of soldering, I would use epoxy.
If you know what you're doing with a soldering iron, you'll be alright. I've soldered plenty of sensitive things in my day, so it can be done.