To install, navigate to http://dof.evocateur.org/ and press the "+" in the center of the bottom bar, then "Add to Home Screen". Confirm the name (which fits just barely), and now you'll have all the depth-of-field calculations you could ever dream of, regardless of network connection.
This was mostly a project to give me an excuse to deepen my knowledge about iPhone web application patterns, as well as tickle my newfound photographic itch. The thrill of having an icon on my home screen that I "made", well, that doesn't hurt either. :D
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Put Your Content in my Pocket, Part 2, by the esteemed Craig Hockenberry, whom I basically ripped off completely, layout-wise.
Click on his picture here, I guarantee a bucket of laughs. -
Create an Aperture Style Camera Lens Icon tutorial on VectorTuts+.
It's such a purty image, I couldn't resist a little hackery in Pixelmator. -
Digital Photography Review's glossary entry for Depth of Field, which contains the inspiration for this whole enterprise, a calculator widget that I wanted to view on my iPhone. The JS was originally written by Alistair Houston, via The JavaScript Source. I merely cleaned up, functionalized, and generally contorted it into modern, idiomatic script.
MIT. I'm not making any money with this, nor do I intend to benefit from the work of others I have so shamelessly copied. Whee, that was fun.