[dorkbotdc-blabber] Meeting wrap up

[M at]

I'm an amateur photographer always looking to improve my skills and I
was looking to to this a while back with a small bank of high power
multicolor LEDs that I could use in place of studio lights and strobes
and use PWM to set them to a preset kelvin that matches my digital
camera's white balance.

I spoke with Tim Slagle on a back channel and he was super helpful
with the pros and cons of going the LED route. Ultimately, I decided
to not undertake the project as digiatl camera sensors don't get
fooled by LEDS like our eyes do. White LEDS are actually blue LEDS
with a phosphorus filter and the sensor picks up more blue than our
eyes do. I think the multicolored LEDs have the same thing going on.
It's really difficult to get a shot that's balanced from frame to
frame unless the shutter speed is a multiple of the frequency of the
pulse from the PWM. (Which is why I try and shoot indoor fluorescent
lights at 1/60th or 1/30 of a second so I can exactly capture one or
two wavelenghs).

However, this color shift shouldn't affect your lighting and stage
work. It may cause a little havoc on the photographer taking photos
for the promotional material, but nothing major.


M@


On Jan 28, 2008 1:45 PM, Panfeld, Michael F. <MPanfeld at wileyrein.com> wrote:
> Hi Folks:
>
> I wish I had been able to attend this past meeting.  However, the snow
> in Utah was just too good.  If the group is interested, I am available
> to tape the next meeting.  I sent a DVD of the Oct Dorkbot meeting to
> Thomas Edwards.  Perhaps he will post it online soon.  If so, you can
> see if it might have value.
>
> I am also looking for somebody to help me develop a large light panel
> comprised of LEDs and that has the ability to tune into any Kelvin
> temperature.  This type of lighting could be used in lighting theatrical
> stages or film sets.  There is at least one product out there already,
> but being the maker I am, I wanted the challenge of doing it myself.
> Perhaps somebody who did the LED workshop and wants to go further.
> Thanks
>
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> .......dorkbot dc: people doing strange things with electricity.........
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"Actually I make more money selling magazines than I ever did at Initrode!"