Snoots.

I just created my 3 snoots. Check out the pics below.

Here's the scene sans snoot:

Short snoot:

Medium snoot:

Long snoot:

All of the above photos were shot at 1/200th @ f/8 ISO 100 with the strobe at 1/4th power.

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To read more regarding snoots and other off-camera flash doo-hickeys, check out Strobist.