All leds are not the same. I looked at the spectrum of some commercial white leds and the spectrum is very non-linear Those used for video photography should be better edwin -----Original Message----- From: owner-photoforum@xxxxxxxxxxxxxxxxxx [mailto:owner-photoforum@xxxxxxxxxxxxxxxxxx] On Behalf Of mark@xxxxxxxxxxxxxxxxxxxx Sent: Sunday, October 18, 2009 6:14 AM To: List for Photo/Imaging Educators - Professionals - Students Subject: RE: densitometers Well after some thought the LEDs seem to be the way to go, but using the KISS principle why not just use an LED flashlight???
