I'm sorry but I do not know English very well. For your convenience, I added photos. I hope you will understand and fun to do this here pendant. Good luck!
Prepare materials for the job.
Detach from chain one ring.
Joined with another ring.
Wrought a ring from a chain by polymer clay.
Add (as appropriate) more clay
The ring should be at the side, stacked on the same side, make a small notch for the nail.
Insert the nail into the hole.
Unfasten the clasp of sandals.
flip the camera and attach a clasp in the middle. (Something like the photo)
Part of the bottom of the close up of polymer clay. (Be careful)
Part of the top close up of yellow polymer clay.
Turn the pendant. Detach from the chain another ring.
Fill the ring of yellow polymer clay. Attach a pendant, between "Flash" and "button".
Take a bead, stone or crystal. Take the little brown polymer clay.
Stick round crystal by polymer clay.
Crystal stick round a second time. We had a lens!
Attach the lens in the middle.
Add a colorful button. And bake in the oven.
We get a nice pendant - the camera!