Flash and settings question

Discussion in 'Beyond the Basics' started by Kinz, Mar 15, 2012.

  1. Kinz

    Kinz TPF Noob!

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    I've got a Nikon D300, a Nikon SB600 flash, and a Sigma 18-125 lens. I need to take photos inside a small auditorium of people on stage at the end of a dancing thing. No photos while dancing, but afterwards, take pictures of people accepting awards. They will be on stage, I will down below where the seating is. I'll need to zoom many times maybe 70 to 100mm. I want to make sure people are in focus and that the light looks correct. My question is that I always thought that your shutter speed should double the lens length. So if I'm shooting at 100mm, my shutter speed should be 200. But if I'm using a flash, it's automatically at a 60th. Won't I have blurred shots. What can I do, or what am I missing in my thought process? Also, how can I make sure the color balance is good? Thanks for any help.


     
  2. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

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    What your missing is the flash duration, somewhere in the 1/5000 - 1/10000 second which is what your exposure will be based on, and that will freeze all motion. Alternatively, you could use your flash in manual, shoot at 1/250 and adust your aperture to suit.
     
  3. KmH

    KmH In memoriam Supporting Member

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    That's just a default setting for P and A mode use, and you can change it.

    See pages 288 - 299 of the D300 user's manual (Custom Setttings - menus e1 - e7)

    The approximate flash duration of a SB-600 set to full power is 1/900 of a second - see page 88 of the SB-600 user's manual.

    As tirediron mentions, when using flash shutter speed only controls the motion stopping of ambient light.
     
    Last edited: Mar 15, 2012

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