I purchased an after-market Telephoto lens for my DSLR. The problem with it was it did not include a tripod mount. The lens is so long that even on my tripod there was too much bounce at the end of the lens that most photos ended up with motion blur. I needed a tripod mount to balance the lens and camera. If you already have epoxy this will cost less that $2. If not it's closer to $5. :)
Epoxy uses two chemicals once combined they form a strong bond. This epoxy will hold 1500 pounds once it cures which should be more than enough for the stress that will be placed on it. You only need a small amount I used one drop of each chemical.