http://www.dofmaster.com/iphone.html Here's a neat app for those without sufficient experience to be able to eyeball or calculate depth of field off the tops of their heads. Basically, you input your distance from target, focal length, aperture, and it will calculate the nearest and furthest acceptable focus. It could be a useful tool, depending on what you shoot. It could also help you learn DOF. Anyway, I thought I'd pass this on.
