I would love to have one of these. From the Photojojo Store.
I love candid shots, and I would especially love to use this with those charming nephews of mine... for those moments when they are not so happy about being in pictures, and thus a tad less charming than normal. Ooh, or a cousin on my dad's side of the family who refuses to let her picture be taken (she's incredibly gorgeous, I don't know what the problem is). Ha! She'll never even see it coming!!
The lens is basically just a fake, and there is a hole in the side (see above) which has a mirror placed juuuust so... which sends the image into the image sensor to be recorded. So, you can take a picture of anything that is at a ninety degree angle from where the front of the lens it pointed.There's a short video on the Photojojo store page if you want to see it in action.
Maybe I'll buy one for myself when I sell my house. Then I can take pictures on my people watching adventures in Paris and no one will be the wiser.
Plus, I think it would just be cool to say, "Hey, So-and-so, I'm going to head out and take some pictures with my Super Secret Spy Lens. Don't be jealous."