
Here's a diagram of the setup I used to get the shot:

The setup was pretty basic. I had my camera level with the smoke against a black background. I used a Canon Speedlite with a snoot to light the smoke, at a 90 degree angle to the camera and at the same height. The important thing is to light only the smoke, and to not let any light spill onto the backdrop. I shot with a wide angle lens and cropped the images in Lightroom (shot at ISO 100 so that the extreme crops still look good)
After my Photo a Day/365 project ends on December 31st, I'll have more time to update this blog, which will include the rest of the smoke shots!