Homebrew PCBs

>Without the reflector and beam collimation, you'll need a bigger 
>globe for the same exposure time.

This is more to do with focus than collimation. Parallel rays would be 
better than divergent rays but convergent rays would even be better 
than parallel rays if shortest exposure time was the only goal.

--- In Homebrew_PCBs@yahoogroups.com, Russell Shaw <rjshaw@...> wrote:
>