So you flew around the world for a photo assignment, camera bag packed full of high-end lenses, but forgot the DSLR on the kitchen counter. Not to worry! You never leave home without your iPhone 4 and its new must-have accessory: the iPhone SLR Mount. $190 scores you one of these aluminum bad boys, eager to pair with your multi-thousand dollar Canon or Nikon optic, bringing "powerful depth of field" and manual focus to your smartphone's itsy bitsy image sensor. You can reportedly use the new pricey mobile rig to capture photos with shallow depth of field, without the need to add one of those "u
