A new SLR adapter for iPhones 3 and 4 is out from online photography shop Photojojo.
The kit includes a case for your iPhone, UV filter and lens adapter for either Canon or Nikon lenses. $249 for the iPhone 4 edition and $190 for iPhone 3/3GS.
There have been several attempts at iPhone SLR adapters in the past, but this seems to be the first mass-produced attempt. The new iOS 5 "volume-up as shutter release" feature should work together nicely with the SLR rig.
Jeremy Salvador previously designed a iPhone SLR mount, but wasn't able to successfully commercialize the product. He comments on PhotoJojo's attempt:
Sure the case and adapter combo is ridiculously sized – but what other device can take a photo, edit it on the fly, and share it on the internet? The purists can scoff all they want at this one. Score one for the iPhone hackers.At $200+ it's certainly not for everyone, but for photographers with lots of glass kicking around, there are worse ways to spend the money -- if it works.
Now there are still going to be some draw backs.