Fresnel shadow/ penumbra
Posted 07 July 2006 - 10:32 AM
Posted 07 July 2006 - 12:00 PM
#1: my unbelievable wacom tablet skills
#2: how i always explained myself the phenomen you described.
i invite anyone to enlighten me, in the quite likely case that i am wrong.
Alex "Mommy says i'm totally clever" Haspel
Edited by haspel, 07 July 2006 - 12:01 PM.
Posted 07 July 2006 - 02:43 PM
This is true of other types of lamps as well, it's just that fresnel lenses help focus the beam more smoothly than what you typically get with just a refelctor (such as an open-faced unit).
Posted 09 July 2006 - 05:59 PM