How to buy a hood for your lens!
I've found a few DPS articles on how to choose a lens, and how to choose a filter, but none on choosing a hood! I know nothing about them... what am I looking for when I shop for one, what size do I need for lens "X", what kind of prices can I expect, what brands are good, etc.? Maybe also explain again why one might want a hood (I know it cuts down on flare, ie. sun rays; but I hear it may add some protection for your lens if it gets bumped or falls... is that true?)
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