A few years ago when we took a trip to Costa Rica, I was hoping to take photos of jungle birds, however, I knew that shooting pictures in the dark understory would prove to be a challenge. I found that there was a product called the "Better Beamer" which uses a Fresnel lens to extend the flash range. I immediately though, "hey, I can do that". So I purchased a Fresnel lens at Barnes & Noble used for magnifying books and made my own bracket out of a plastic milk jug (I wanted it to be foldable). After a few variations, I had what I wanted. The tests were very positive!