Trying to get someone to "act natural" in front of a camera is like trying to perfect my costume for a Halloween party: I try, but am never 100 percent believable. With most folks, there's always a bit of apprehension that keeps you from getting that perfect photojournalistic (read: candid) shot, but this little gadget may help you out in that department.
The Super Secret Spy Lens ($50) has a discreet side cutout, fashioned with a precise inner mirror so it looks like you're aiming straight ahead, but are really capturing images on the sly. Now, this can be a great tool if you aren't a pro at putting your subjects at ease, but since that's part of the job of a photographer, wouldn't you want the practice? Also, I might feel a bit like a peeping Tom, but maybe that's just me.