It is not really possible to defy the inverse square law. I know I tried and failed miserably. But you can stretch it.
A better beamer is a device that does just that, it extend the distance the light from your strobe travels. So while the inverse square law is still in effect, it stretches over a greater distance.
Physics bla-bla aside, it means that light coming from your strobe will go further. Some strobes, like the SB900 has an impressive zoom functions that does just that.
Flickr used lonelyhome contrapted a poorman’s better beamer using a cheapo Fresnel lens (around $1) and some plastic (I assume cardboard will do too).
The picture is really self explanatory.[Read More…]