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Thread: ND sanity check

  1. #1
    ryanmills's Avatar
    Join Date
    Oct 2012
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    Spokane, WA
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    ND sanity check

    Just want to make sure im thinking about this right. If im using iso 400 speed film and a 3 stop ND filter, i should be metering at iso 50?

  2. #2
    C. D. Keth's Avatar
    Join Date
    Apr 2006
    Location
    Salt Lake City, UT
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    Re: ND sanity check

    Yup, that's right.

    3 stops means you half your ISO three times. 400-once>200-twice>100-thrice>50
    Chris

    Quote Originally Posted by Pawlowski6132 View Post
    Grow a pair and go shoot.

  3. #3
    Preston Birdwell
    Join Date
    Feb 2007
    Location
    Columbia, CA
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    1,577

    Re: ND sanity check

    This is true for an ND filter that affects the entire negative. If it's a Graduated ND then you would not adjust the ISO, but you'd need to see if the filter will provide the correct exposure for that portion of the negative that is affected by the additional density.

    --P
    Preston-Columbia CA

    "If you want nice fresh oats, you have to pay a fair price. If you can be satisfied with oats that have already been through the horse; that comes a little cheaper."

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