Whether you're documenting something bizarre you saw on the train, or secretly capturing images of your crush, this rotating spy lens from Photojojo makes it incredibly easy to covertly capture images on your iPhone. Think of it as a tiny periscope for your smartphone, but instead of torpedoing frigates, you can use it to sink reputations or just collect some useful blackmail material.
For $US20 you get the lens and an adhesive magnetic ring that sits flush on the back of your iPhone 4 or 5 making it easy to attach and remove the accessory. And if paired with one of the countless apps that disguise the fact you're taking a photo, most people will be none the wiser of your covert photography. Sure, it's good for plenty of practical uses — Instagramming a meal, shooting at extreme angles — but what's the fun in that next to some good ol' fashioned creeping? [Photojojo Store]