Exposure

Discussion in 'Beyond the Basics' started by B192734, Jun 20, 2008.

  1. B192734

    B192734 TPF Noob!

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    So anyone out there have a thread or website or anything that gives a good technical explanation of exposure, and how to recognize the necessary settings for proper exposure? I'm sure that there have been many on here, but at the moment I am not seeing any. Trying to expand basic knowledge to create better photographs. Thanks, and everybody have a great rest of their day.
     
  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Look up the terms; Shutter speed, aperture, ISO (as it pertains to photography).

    I don't know of any sites, off the top of my head...but I'm sure there are many.
    Many people recommend the book 'Understanding Exposure' by Peterson.
     
  3. jcolman

    jcolman TPF Noob!

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    The simplest way I know of to get a proper exposure with modern digital cameras (assuming that you don't have a light meter) is to use a white towel and the histogram on your camera.

    Place the white towel in your frame. Take a picture. Adjust your exposure up or down until the spike from the white towel just begins to touch the right side of your histogram.

    In a nutshell, your camera can only record about 5 or 6 full f/stop tonal ranges. If you use the white towel to find the upper limits of your camera's range, the rest of the exposure will fall into place.
     
  4. Garbz

    Garbz No longer a newbie, moving up!

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  5. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

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    Also read about and understand the daylight exposure rule.
     
  6. christopher walrath

    christopher walrath No longer a newbie, moving up!

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    Go to my website in my signature. Go to the tutorials section.
     
  7. reg

    reg TPF Noob!

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    That sounds like a really good way to cause data loss in the shadow details (YMMV based on metering-type).
     
  8. Helen B

    Helen B TPF Noob!

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    Don't you mean highlight details - a towel (I'm assuming it is a paper towel) may not be bright enough to use as a highlight limit.

    Best,
    Helen
     
  9. reg

    reg TPF Noob!

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    Actually, Helen, I meant the shadows. If he's metering based on putting a white (something) in the scene, then adjusts to compensate for THAT, it seems like a really good way to underexpose the scene.
     
  10. Helen B

    Helen B TPF Noob!

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    He's suggesting that the white towel be placed at the right hand side of the histogram ("Adjust your exposure up or down until the spike from the white towel just begins to touch the right side of your histogram.") - ie close to saturation. That's exposing for the highlights, which is usually considered to be the correct way to expose digital, if you use a bright enough highlight.

    Best,
    Helen
     
  11. Mike_E

    Mike_E No longer a newbie, moving up!

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