So you are keeping tabs on that special someone at work, at home and even in the bathroom, but what about in public? Putting on sunglasses and trekking out with a camera is still too obvious. That's where this right angle camera adapter steps in. It allows for right-angle pictures to be taken at any cardinal direction of you without needing to look in that direction.

This $40 lens from Opteka is designed for select Fuji cameras, but this generic and open design would allow for it to be quickly popped onto almost any camera, save for DSLRs. If you're not a private investigator that could legitimately use a device like this, then maybe it is time to give that stalkee a rest and find something else to do, then again, who I am to judge what you do.

Opteka Voyeur Spy Lens, via CG