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Well... Sort of...

Posted By: Jim Wimmer (12.230.78.211)
Location: Seattle
Date: Wednesday, 23 July 2003, at 2:06 a.m.

In Response To: Link to strobe test (Gabe Choy)

Color temp, equivalent to Wein's displacement, will vary with voltage/current to the head. Some packs do nothing more than vary the voltage/current with a trim of the power output causing the color shift. But, if you throw in the fact that many packs allow you to add in or take out banks of capacitors, doing a quantum change to the power level, with little change to color temp, and throw on top of that a change in the flash duration which can also change the color temp a bit... you should find that a good digitally controlled pack will vary up and down the color temp a bit, but keep it in a pretty narrow range.

But let's face it, the color temp will also vary on how the head has been used as older tubes can go cold... and that can be a bigger effect than anything we've mentioned to this point.

If you really want to have fun... high end Broncolor packs allow you to change all the parameters, or if you want it easy, you can use their color sensor and dial in the temperature you want... but that's being really picky!

Considering that sometime ago, Chad posted a picture I really liked and he just used the headlights from his car... like there's a controlled source!

Happy Shooting,

Jim

Oh, the picture is of Michelle, I'll be posting more of her shortly... great model to work with.

A bit of my Photography

Messages In This Thread

• Color temp -vs- strobe output level
  Gabe Choy (172.194.107.55) -- Wednesday, 23 July 2003, at 1:04 a.m.
  • Link to strobe test
    Gabe Choy (172.194.107.55) -- Wednesday, 23 July 2003, at 1:09 a.m.
    • Well... Sort of...
      Jim Wimmer (12.230.78.211) -- Wednesday, 23 July 2003, at 2:06 a.m.
      • Now you have me wondering
        David Cooke (12.206.106.66) -- Wednesday, 23 July 2003, at 2:15 a.m.
        • Re: Now you have me wondering
          Jim Wimmer (12.230.78.211) -- Wednesday, 23 July 2003, at 2:45 a.m.
      • Re: Well... Sort of...
        Gabe Choy (172.196.237.80) -- Wednesday, 23 July 2003, at 3:40 a.m.
        • Re: Well... Sort of...
          Jim Wimmer (12.230.78.211) -- Thursday, 24 July 2003, at 2:54 a.m.
  • Re: Not an issue for me
    David Cooke (12.206.106.66) -- Wednesday, 23 July 2003, at 1:46 a.m.
  • Re: Color temp -vs- strobe output
    Michael and Barbara Jarboe (4.41.209.191) -- Wednesday, 23 July 2003, at 2:17 a.m.
    • U throw a lot of good info for us, but you missed.
      Gabe Choy (172.196.237.80) -- Wednesday, 23 July 2003, at 3:22 a.m.
      • Re: U throw a lot of good info for us, but you mis
        Michael and Barbara Jarboe (4.41.209.191) -- Wednesday, 23 July 2003, at 11:43 a.m.
        • getting 12% or 15% grey card?????
          Gabe Choy (216.254.59.163) -- Wednesday, 23 July 2003, at 1:07 p.m.
          • Call Pantone and Canon
            Michael and Barbara Jarboe (4.41.209.191) -- Wednesday, 23 July 2003, at 1:47 p.m.
            • "It sounds wierd". not at all, simple basic rule..
              Gabe Choy (216.254.59.163) -- Wednesday, 23 July 2003, at 2:42 p.m.
          • Percent gray doesn't matter for color balance (n)
            Rick Campbell (67.1.38.136) -- Wednesday, 23 July 2003, at 7:00 p.m.
    • You don't have problem with full size sensor.
      Gabe Choy (172.196.237.80) -- Wednesday, 23 July 2003, at 4:08 a.m.
      • Interesting, but...
        Jim Wimmer (12.230.78.211) -- Thursday, 24 July 2003, at 2:42 a.m.

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