Shutter speed fun

Discussion in 'Just For Fun!' started by petto, Mar 4, 2012.

  1. petto

    petto TPF Noob!

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    Having fun with shutter speeds. Shot with Canon 7D and Tamron 28-70mm f/2.8 outdoor nautural light.

    ISO 3200
    28mm
    f/2.8
    1/1250
    [​IMG]

    ISO 100
    28mm
    f/5
    1/6
    [​IMG]


     
  2. IgsEMT

    IgsEMT No longer a newbie, moving up!

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    N I C E !!!!
    Great Job :)
     
  3. 480sparky

    480sparky Chief Free Electron Relocator Supporting Member

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    You didn't quite get equal exposures, however. You second frame is about 1-1/3 stop more.
     
  4. petto

    petto TPF Noob!

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    Are you referring to the aperture? I was shooting in shutter priority, should have switched manual to allow the same stop.
     
  5. 480sparky

    480sparky Chief Free Electron Relocator Supporting Member

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    All three items of the Exposure Triangle changed. ISO 3200 to 100, shutter from 1/1250 to 1/6 and f2.8 to f.8. But they are not equal exposures.
     
  6. petto

    petto TPF Noob!

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    So to be equal all 3 would need to be the same? Not sure what your getting at with the equal exposure thing. I was just trying to demonstrate different shutter speed and motion.

    Should i have shot manual and kept the ISO and f the same and only changes the shutter speed? Sorry if i sound confused.
     
  7. 480sparky

    480sparky Chief Free Electron Relocator Supporting Member

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    ISO 3200 to ISO 100 is lowering the exposure by 5 stops.

    Going from f/2.8 to f/5 is lowering it another 1 2/3 stops. Total so far, -6 2/3

    Then you raised it 8 stops by going from 1/1250 to 1/6 sec. So the exposures are (8 - 6 2/3) 1 1/3 stop different, the second one being 'overexposed' compared to the first. You can see this in the brightness of the stones.
     
  8. petto

    petto TPF Noob!

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    I see what you mean. I was not going equal exposure, however now that you pointed it out it would have looked better. Def for some side by side prints. I will attempt a reshoot with tripod and math and try for an equal set.
     

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