Kodak Double-X 2405

Discussion in 'B&W: Film, Paper, Chemistry' started by snaggs, Nov 26, 2012.

  1. snaggs

    snaggs Member

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  2. MartinP

    MartinP Member

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  3. snaggs

    snaggs Member

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    Yes, I know its aerial film, but its got to be similar to other normal film lines. Aerial Tri-X was still basically Tri-X, Aerial Plus-X was based on plus-X and so my question was, what is Double X? Is it basically Tri-X?

    http://www.project-double-x.org/about.html
    Daniel.
     
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  4. snaggs

    snaggs Member

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  5. Gerald C Koch

    Gerald C Koch Member

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    Why does it have to be similar, because of the similarity of the names? The two emulsions are very different. Aerial films have a different spectral sensitivity which can be a problem when the film is used for general purpose photography. Their sensitiztion is designed to cut through haze.
     
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  6. polyglot

    polyglot Member

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    The Aerecon has extended-red sensitivity therefore a 2-stop filter factor with #25A instead of 3-stop. Hard to tell much from that comparison image since the contrast is different but maybe there's reduced green sensitivity. Maybe not.
     
  7. Gerald C Koch

    Gerald C Koch Member

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    From the technical portion for this film.

    Aerial film speeds (ISO A or EAFS) should not be confused
    with conventional film speeds which are designed for roll
    and sheet films used in pictorial photography. The
    characteristics of aerial scenes differ markedly from those of
    ordinary pictorial or ground scenes because of the smaller
    range in subject luminances, atmospheric haze conditions,
    and other factors
    .

    The film might be useable but don't expect normal rendition of colors. The spectral sensitivity curve looks very strange.
     
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  8. Gerald C Koch

    Gerald C Koch Member

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    Over the years Kodak has had a number of films named Double-X varying in format from 35mm to sheet film. AFAIK none of these have been the same emulsion.
     
  9. snaggs

    snaggs Member

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    Well, we all know marketing departments do all sorts of things to "make new product". Its hard to know how much difference there really is. Anyways, there is one guy on flicker who's posted some photos. Certainly a nice rendition of the bridge.

    Would be nice to see some portrait shots, I guess that will fall to me unless someone else here actually has some experience with this film as opposed to reading off the Kodak sheet?

    8130614833_33d222d8be_o.jpg
     
  10. polyglot

    polyglot Member

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    Is anyone else seeing ic-racer and Gerald's posts hidden above? I'm seeing Gerald at #7 (film speeds), two greyed-out boxes (ic-racer, Gerald at 11 minutes apart) then Gerald again ("over the years") as post #8. It's very odd.
     
  11. AgX

    AgX Member

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    These are deleted posts.

    At least deleted posts look like these.
     
  12. ic-racer

    ic-racer Member

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    I deleted my post because the question I asked was answered in snaggs' other thread on 70mm film.
     
  13. laser

    laser Advertiser Advertiser

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    Sixty or more years ago films with similar names may have indeed been similar. However, as applications changed and technology advanced the films also changed to satisfy customer needs. To learn about the film only concern your self with data generated on that specific film code 2405. Trademark names can be used on different products, the film codes are usually the best identifier. I say usually because some film codes can be reassigned after 10 year or longer period of not being used.

    Bob
    Author of: http://makingkodakfilm.com
     
  14. StoneNYC

    StoneNYC Subscriber

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    Is this true of all aerial films?

    Should I be using a red 25 filter with a 2 stop adjustment on my GAF aero film?


    ~Stone

    The Noteworthy Ones - Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1 / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic

    Sent from my iPhone using Tapatalk
     
  15. Gerald C Koch

    Gerald C Koch Member

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    No these are deleted posts. IIRC these were once marked as such automatically.
     
  16. Gerald C Koch

    Gerald C Koch Member

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    Haze reflects blue light and so extended red sensitivity is needed to see thru the haze. So I would say yes all aeriographic films have this property. This can be seen from looking at the spectral sensitivity curves for the films.
     
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  17. snaggs

    snaggs Member

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    Thankyou Bob! I shall read your site.
     
  18. polyglot

    polyglot Member

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    I was confused because I'm used to seeing "post deleted by X because Y" but they're just blank rectangles and they have no sequence number attached to them. If you know for sure they're deleted, that's cool.
     
  19. AgX

    AgX Member

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    For some time the "deleted" reference has vanished from those post. There are a lot of these bugs around at apug by now.