Here are the details for my home made snoot.
I made my a mk I snoot from Pringles tube (see drawing)
with a black card cone inside and finished with tape at the front, the narrow end of the cone was about 3/4" but it was all a bit flimsy and the beam was wider and harsher that I was looking for. My MK II was made from a biscuit tin (see pics) there are 2 main advantages,1st, it is a lot sturdier, 2nd, the biscuits are delicious
. It also has a very tight fitting lid. I cut a hole in the lid and used Don's idea of using drinking straws, As you can see in pic #3 how narrow the beam is on the backdrop, and that is what I was looking for to light up the snow peak on the Mont Blanc pen in my post
" Mont Blanc and noir ".
http://www.worldphotographyforum.com...0&limit=recent
The last pic shows what can be done with the beam.
I also found that if I use a slow shutter speed with back curtain sync flash mode I get a pre flash about 1/2 second before main flash which gives me time to redirect beam to where it is needed.