"Pretty much the only thing stopping me from buying an iPhone to use as my next camera is the fact that I can’t shoot photos with a shallow depth-of-field, which throws the background into a distraction-free blur while keeping your subject pin sharp. The ridiculously impractical iPhone SLR Mount probably won’t change my mind, but if I had an iPhone already, I would be fingering my credit card right now.
The “mount” is actually more of a case. You slide in your phone, screw on the long cylindrical adapter and then snap on your SLR lens. The kit comes in Nikon and Canon flavors, so you can mount pretty much any Nikon lens ever made, or use any Canon lens manufactured since the 1980s (when Canon switched mounts).
You can’t remove your iPhone’s own lens, of course, so this adapter comes with its own focussing screen, just like the one in your actual SLR. The iPhone then just takes a snap of this screen, which results in a sharp, bright (but upside-down) images.
Like I said, I’d be fingering my credit card in anticipation. Once I saw the price, though, I might slide it back into my dusty, moth-infested wallet. The iPhone SLR Mount costs $250, or $190 if you choose the iPhone 3-compatible version. For that money, you could buy an actual lens for your real camera."
Courtesy of Wired