This is crazy. Photojojo is selling an SLR lens mount for the iPhone 4 for $190. The lens mounts via a whole separate case that you have to put around the iPhone 4 and renders the phone un-pocketable. Little details are out about the SLR lens mount for now, but it doesn’t look like the case transfers any data to the phone about aperture reading or lens type (that would be a neat feature though). While this is cool in some ways, I can’t help but think of the impracticalities of carrying an SLR lens around just to shoot photos off of your iPhone. At that point, wouldn’t it make more sense to just carry the actual SLR? Color me confused about the intended buyer for this expensive iPhone 4 accessory!