ASA Film Speed

Discussion in 'Beyond the Basics' started by jophassa, May 26, 2006.

  1. jophassa

    jophassa TPF Noob!

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    What exactly is ASA film speed? is it some sort of rudimentary ISO level? Thanks
     
  2. Big Mike

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

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    Yes, pretty much the same thing.
     
  3. duncanp

    duncanp TPF Noob!

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    its american ISO.... basically..
     
  4. jophassa

    jophassa TPF Noob!

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    why must they fiddle with everything??

    but americans use ISO now dont they because europeans used Ghost when americans used ASA?
     
  5. Big Mike

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

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    ISO is the International Standards Organization, rather than just a national standard....it's newer than the old standards...so a lot of things have gone over to ISO.
     
  6. jophassa

    jophassa TPF Noob!

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    that is totally strange how the ISO levels are an organisation's name! i thought the S stood for Sensitivity and the other two something else. How weird. Thanks - Big Mike has been ever so patient with me being a noob!

    I am really beginning to get the hang of it and i am having a lot of fun with all the lenses.
     
  7. PopPicker

    PopPicker TPF Noob!

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    There'se always been a lot of confusion regarding these abreviations.

    ASA
    DIN
    ISO
    GOST

    Plus I think the the Japanese had their own at one time.

    ASA = American Standards Association
    DIN = Deutsches Institut für Normung
    ISO = International Standards Organization
    GOST = Gosudarstvennyy Standart ( as found on Zenits and Feds LOL )

    Actually sensitivity is one of the few American measurements that the world has embraced. The European standard was for the most part DIN. ISO is an agreement by all countries to use a standard form of measurement to avoid confusion. The clock is ticking on the USA and the UK switching to kilometers.


    To refer to sensitivity as ISO is a bit ridiculous, you may as well say you were driving at 60 ISO or that you weigh 92 ISO.

    But that's how it iis, we've all got used to it I guess.

    Well I'm off to heat some water to 100 ISO and enjoy a tea :)


    PP
     
  8. Unimaxium

    Unimaxium TPF Noob!

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    To say it simply: yes, ISO film speed is the same thing as ASA film speed. They mean the same thing, and can pretty much be used interchangably. It just depends on how american you are ;)

    Generally these days most people in America call it ISO anyway. I think ASA is falling out of use these days.
     
  9. jophassa

    jophassa TPF Noob!

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    OK, thanks. It just worried me that my camera had no ISO settings and the manual obviously couldnt tell me about the changes as it isnt prophetic.
     

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