DIY_snoot.jpg

From the MAKE Flickr pool:
Member Chris Metcalf constructed this flash snoot from corrugated cardboard and gaffer tape.
Although it may sound like the name of a Dr. Suess character, a snoot is a sort of choke used in photography to limit the spread of light from a flash. Snoot’s can create an eerie vignetting effect or dramatic highlight – and can be constructed from recycled household items.

DIY_snoot_image.jpg
DIY Snoot on Flickr –Link

How to make your own snoot:

Make a DIY flash snoot on DSLRBlog –Link

Black straws snoot grid on LightingMods –Link

Related:
DIY ring flash
DIY ring flash –Link