(Okay, that's a misleading headline, since you also need a camera and a
macro lens as well. But it works and the results are great!)
This method works
much better than the dedicated film scanners that were once available: Using a
24 megapixel camera, you get a larger file size: 6000 x 4000 pixels versus 3779
x 2522 of the Nikon Coolscan LS-2000 (which continues to gather dust under my
desk). If you use an even higher megapixel camera, you can easily see just how unsharp your old film lenses were.