This gadget is quite crazy but might potentially work. The Super Secret Spy Lens is a lens extension which works like a periscope in that it has a 45 degree angled mirror that takes a picture of something to the side of you instead of forwards.
Due to the length of the lens it makes it simple to either peek around a corner or just pretend you are photographing something completely different. Although it has a massive hole cut out of the side to let the light in, from a long distance it wont be noticeable. The lens fits on to a DSLR camera lens and can be rotated 360 degrees to take pictures at all angles to the side or above/below you.
If you are a type of secret spy then you can pick one up for $50 at Photojojo.
Via: Geeky-Gadgets
cool but obviouse