What a difference a couple of years make. Back in 2009, you had to scrounge together a bunch of lenses and glue them to a jar lid if you wanted a smartphone lens carousel. Nowadays you’ve got options.
Looking for a set of workhorse lenses? Check out The iPhone Lens Dial from Photojojo. For considerably more than the cost of a subsidized iPhone you can outfit your latest handset with three lenses: wide angle, fisheye, and telephoto.
How about some fun without breaking the bank? Then try the Holga iPhone Lens Filter Kit SLFT-IP4. It costs an order of magnitude less than the Lens Dial, but comes packed with four novelty lenses and five filters for creative picture taking.
Whether you’re building your own or buying an off the shelf mod, you’ll have a ton of fun extending your gear well beyond its intended use.