Incidentally, Carl had a tip for Micro 4/3 shooters: the B+W 46mm Screw-In Folding Rubber Lens Hood #900, a rubber lens hood for normal lenses, works with both the Panasonic Lumix 20mm ƒ/1.7 (40mm equivalent) and the Panasonic 14mm ƒ/2.5 (28mm equivalent) lenses. The objective elements are physically so small that there's no vignetting from the B+W hood with either lens.
Just thought I'd pass that along—but thank Carl, not me.
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Original contents copyright 2011 by Michael C. Johnston and/or the bylined author. All Rights Reserved.
Featured Comment by Roger Suppona: "I laugh at your puny little rubber lens hood!"
Featured Comment by David Dyer-Bennet: "I got the lens hood religion back...not sure; college maybe? A while ago. Definitely with a preference for rubber lens hoods, because they provide a shock absorber for frontal impacts. Here's another rubber lens hood trick: To shoot through glass, press the hood to the glass to exclude most sources of reflections—and, with a rubber hood, you can still vary the angle some to aim exactly where you want."