How to set ISO settings in a NIkon F with Photomic T prism?

Discussion in '35mm Cameras and Accessories' started by Vsanzbajo, Jul 7, 2011.

  1. Vsanzbajo

    Vsanzbajo Member

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    I can not figure this out. Please help.
     
  2. Jeff Kubach

    Jeff Kubach Member

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    As I as I know ASA is equal to ISO.

    Jeff
     
  3. Vsanzbajo

    Vsanzbajo Member

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    I know that, but I do not how to set ISO in the camera with the prism on it.
     
  4. 2F/2F

    2F/2F Member

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    It is different for each lens, so you need to choose your lens first. Then, look at the lowest f number on the aperture ring, e.g. f/1.4. Whatever that is, you line up the EI with it on the meter. You need to lift the ring to rotate it.
     
  5. Vsanzbajo

    Vsanzbajo Member

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    I have a 1'1.4 lens. EI? What is that? Can you explain step by step, please?
    Thanks
     
  6. Sirius Glass

    Sirius Glass Subscriber

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    Use the box speed of the film [ISO, ASA ...] as the EI. EI is the Effective Index which for now use the ISO. You can learn about EI later if you want to use a variant of the Zone System [ZS]

    Look for a manual at http://www.butkus.org/chinon/nikon.htm If you find what you need please remember to send him the $3.

    Steve
     
  7. 2F/2F

    2F/2F Member

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    EI is the number that you put into your exposure calculations or light meter. In other words, it is how you "rate" your film.

    Box speed is box speed because it works for an average shooting in average conditions. It should get you a usable image, though usually not "ideal," most of the time, so I'd start with that for your EI.
     
  8. Grif

    Grif Member

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    Last edited by a moderator: Jul 8, 2011
  9. John Koehrer

    John Koehrer Subscriber

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    Lets another whack =)
    ASA/ISO is the film manufacturers rated speed for a given film. IE: Tri-X=400.

    EI is Exposure Index, a film speed rating different than the manufacturers.
    Usually found by testing your exposure/development techniques to find an exposure that gives the results you want. Usually a full range of detail, but not necesarily, you may want higher or lower contrast or a more or less dense negative.
    The NikonTn meter has a series of maximum apertures on top of the SS dial. To set the ASA/ISO. You set the max aperture of your lens to the appropriate mark on the dial.
    This needs to be changed when you change to a lens with a different maximum aperture.
    Because this is the manufacturers rating, it not EI but is ASA/ISO.
     
    Last edited by a moderator: Jul 8, 2011
  10. fstop

    fstop Member

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    Lift the ring and turn it.
     
  11. Vsanzbajo

    Vsanzbajo Member

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    And line it up to what? The 1.4 aperture of my lens or the red mark? They are very close to each other.
     
  12. brucemuir

    brucemuir Member

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    The red dot on the shutter speed dial is for an f/1.2 lens or if using a lens with no aperture prong.
     
  13. Vsanzbajo

    Vsanzbajo Member

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    So the I align it with 1.4, right? That is my lens aperture.
    Thanks
     
  14. fstop

    fstop Member

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    I'm going to have to take my digital camera out and shoot pics of the analog camera? The ASA setting has absolutely nothing to do with the lens speed.
     
  15. brucemuir

    brucemuir Member

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    Actually YES, it does on a Tn finder...
    you must index the max aperture to the meter by way of the asa dial.
    It works differently than the FTN and later photomic heads.
     
  16. 2F/2F

    2F/2F Member

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    Please do post said pix that prove your statement, since it goes against common knowledge of Photomic heads.