Well, the lomo scanner seems to do a pretty good job...
doesn't that just have a hole in it? my iphone 4s only seems to focus down to 7x11 cm size so I'm worried that shooting a 35mm neg might be extra crappy
Well, they use it for scanning lomokino negs, and these are pretty small...
I wouldn't be surprised if there was a small macro adapter in it. These are cheap online. Laxt boxing day, I got a set of adapter lenses for my phone at staples and one of them is a macro lens.