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In this instructable, you'll see how to make a flash modifier to focus the light into a narrow beam to add emphasis to your photo
Step 1Cut the soda straws
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Visit your local "Party Supply Store" and ask for black straws. Two packs of 50 costs about 3 Dollars US. Also visit a local hardware store and pick up a section of vinyl drain pipe. (Hint: these are sold in 10-foot lengths, so look for elbows or have these cut in the store so they'll fit in your car)
Mosey on home, after paying for your purchases of course, and cut the straws in equal lengths. Load these into the drain pipe section for a tight fit.
Really effective. =)
(Of course, this wouldn't work with a strobe that has modeling lights, they'd melt the plastic. But for a small handheld portable it's great!)