It’s a cylindrical flash accessory that attaches to your hot shoe flash and concentrates the light. I frequently see it used with portraits, but as with many photographic tools, its use is really only limited by your creativity. (Make sure to test and bracket to get the right exposure!)
These can be bought commercially — but here’s a link to a fully-illustrated post on F/1.0 offering step-by-steps on building your own, quickly, and with inexpensive materials. And instructions to build not just any snoot, but a sturdy and flexible one that can be configured in a variety of ways, suitable for many different creative applications.
Read the 15 second DIY adjustable snoot! @ F/1.0 »

