A snoot is a piece of plastic you strap to your flash to make a beam of light in the shape that you want. And as everything in photography, it's a piece of plastic that you can buy from 17 to 200$. So I watched several video tutorials and compiled them with what I had at home to make my own DIY snoot
Material and tools used:
Steps:
The cat came to assist me, maybe because she also has something plugged to her head at the moment, but I don't recommend that step
The result:
My next DIY snoot will be with a Pringles box to get a round light shape. In that case it's even easier to do: you just need to eat the Pringles, clean the box and plug it to your flash.
Let me know if this was useful and if you have other tips to make snoots.