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Thread: Repository for scans of f-scales ?

  1. #1

    Question Repository for scans of f-scales ?

    Is there an image repository for scans of shutter f-scales? If not, then if someone wants to start one, I'll contribute.

  2. #2
    loujon
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    Re: Repository for scans of f-scales ?

    Quote Originally Posted by consummate_fritterer View Post
    Is there an image repository for scans of shutter f-scales?
    Not that I'm aware of as there are so many variables and loads of them but it sounds like a fine idea.

  3. #3
    Jac@stafford.net's Avatar
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    Re: Repository for scans of f-scales ?

    Good idea. May I suggest that photos or scans include a description and a fine ruler to indicate dimensions?
    I would reproduce scans in vector graphics for engineering drawings, CAD/CAM, etc.

  4. #4

    Re: Repository for scans of f-scales ?

    Quote Originally Posted by Jac@stafford.net View Post
    Good idea. May I suggest that photos or scans include a description and a fine ruler to indicate dimensions?
    I would reproduce scans in vector graphics for engineering drawings, CAD/CAM, etc.
    Good ideas but I don't think a fine ruler is necessary provided the scale is correct along with precise shutter and optics info.

    Please post what you need. Maybe one of us has the correct scale for the lens cells and shutter.
    Last edited by consummate_fritterer; 23-Jul-2017 at 07:31.

  5. #5

    Re: Repository for scans of f-scales ?

    An example of what I need is the scale for a f-9 (f-6.8) 150mm Apo-Computar (or Apo-Kyvytar... or Graphic-Kowa) in Copal shutter with 7-leaf aperture.

  6. #6
    Jac@stafford.net's Avatar
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    Re: Repository for scans of f-scales ?

    Quote Originally Posted by consummate_fritterer View Post
    Good ideas but I don't think a fine ruler is necessary provided the scale is correct along with precise shutter and optics info.
    I could not disagree more.
    .

  7. #7

    Re: Repository for scans of f-scales ?

    Quote Originally Posted by Jac@stafford.net View Post
    I could not disagree more.
    .
    Point correct... any cells that fit modern #00, #0, #1 and #3 Copal/Compur/Seiko/Compur/Prontor shutters are the same, if cells are transplanted into similar shutters the scale will be correct.

    The point is to have a repository for as many combinations as we can collect so we can make f-scales for which lenses are missing them. BUT... in most cases, cells are made for specific shutters.

    We can do this. As Dr. John Nash would have said (paraphrased), "The best outcome results from each individual doing what's best for himself... and for the group".

  8. #8
    Jac@stafford.net's Avatar
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    Re: Repository for scans of f-scales ?

    Quote Originally Posted by consummate_fritterer View Post
    Point correct... any cells that fit modern #00, #0, #1 and #3 Copal/Compur/Seiko/Compur/Prontor shutters are the same, if cells are transplanted into similar shutters the scale will be correct.
    I have doubts. I hope Dan Fromm contributes to this thread.

  9. #9

    Re: Repository for scans of f-scales ?

    Probably the best thing would be to close this thread and someone better qualified start a new one on the same subject. I've already made too many errors.

  10. #10

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    Re: Repository for scans of f-scales ?

    Quote Originally Posted by consummate_fritterer View Post
    Point correct... any cells that fit modern #00, #0, #1 and #3 Copal/Compur/Seiko/Compur/Prontor shutters are the same, if cells are transplanted into similar shutters the scale will be correct.

    The point is to have a repository for as many combinations as we can collect so we can make f-scales for which lenses are missing them. BUT... in most cases, cells are made for specific shutters.

    We can do this. As Dr. John Nash would have said (paraphrased), "The best outcome results from each individual doing what's best for himself... and for the group".
    Eh? Wot? Are you sure?

    More exactly, do you mean to say that my 180/6.8 Beryl and my 80/2.8 Planar, both of whose cells fit a Compur/Copal #1 can use the same aperture scale? I've tried the experiment and they can't.

    Re Nash equilibrium, are you sure about that too? I mean, in non-cooperative games -- not relevant here or to most situations -- each player looks out for itself without concern for what happens to the other players.

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