The Pentax Q is the smallest interchangeable lens camera on the market. And, just like the company's famously diminutive Auto 110 SLR from the late 70's, it achieves this by embracing a smaller format than its peers. Being built around a 1/2.3" sensor, the Q is a fraction of the size of even the smallest existing mirrorless cameras and is the first really pocketable model (though the protruding lens still means that'll have to be the pocket of your jacket, rather than your shirt or trousers).

 Comes with manufacturers warranty.