Bhautik Joshi, a camera hacker, has custom built an optical called Phone-O-Scope. This adapter allows you to attach SLR lenses to the iPhone.

The Phone-O-Scope doesn’t take especially superb images, and it’s a bit clumsy to handle. On the other hand, it’s fun to shoot with and produces very analog (almost Holga-like) results. You also get the advantages of SLR lenses – that is, DOF effects, and the wide range of available focal lengths (i.e. macro to telephoto).

More pictures after the break.

[via LikeCool]