Dave JohnsonMacworld

Dave Johnson is a writer and photographer who has covered technology for magazines such as PCWorld and Wired. He is currently the Editorial Director for eHow.com's Tech channel. Dave is the author of How to Do Everything with Your Digital Camera, and over a dozen other books.

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Meet the iPhone cases that can hunt ghosts and build furniture

Think like the Most Interesting Man in the World: He doesn't always use an iPhone case, but when he does it can see heat or cut down a tree.

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These cases turn your smartphone into a pay pal

Both the Incipio Cashwrap and Loop ChargeCase add mobile payment capabilities to the iPhone. We look at the pros and cons of both mobile transaction cases.

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The best iPhone lens kit: Put a little DSLR on the front of your iPhone

Looking to outfit your iPhone's camera with an external lens or two? Dave Johnson put five lens kits to the test to figure out which one reigned supreme.