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Thread: arca swiss movimientos

  1. #1

    Join Date
    Nov 2009
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    Asuncion - Paraguay
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    arca swiss movimientos

    boys, a help, as the metric scale of the ark is used, I add a photo for better understanding,
    For a 300 lens, if I set the zero from the front of the support where it is 30 cm, in point 1 or point 2.
    my query is understood.

    Click image for larger version. 

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  2. #2

    Join Date
    Jul 2013
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    72

    Re: arca swiss movimientos

    I never used Arca, but why you cant measure it. Take a rule or tape and measure the bellows extension. You do it one time and will know forever. And second if both standards having the same dimensions, and from yours picture it looks like they are the same then if the 0 point aligned with the back of the back standard then the 300 shall be aligned with the back of the front standard. And opposite of course if the zero aligned with the front of the back standard then 300 shall be aligned with the front of the front standard. Once again I never used Arca, this is only what I think should be.

  3. #3

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    Nov 2009
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    Asuncion - Paraguay
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    Re: arca swiss movimientos

    Thank you very much, I'll keep your instructions in mind. I will put it into practice




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  4. #4

    Join Date
    Jul 2016
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    3,814

    Re: arca swiss movimientos

    Quote Originally Posted by Ricardo Maydana View Post
    For a 300 lens, if I set the zero from the front of the support where it is 30 cm, in point 1 or point 2.
    The reference spacing between front and rear standards is 0 to 1 points, but this does not ensure a perfect focus, for example each lens has a flange focal distance that usually it's different than the focal length.

    You may first focus at infinite with the 300 (with magnifier in the Ground Glass) then you focus on your subject by moving X millimeters one standard, then to calculate the exposure factor from bellows extension you use the nominal focal length that is 300 and the actual bellows draw that is 300+X.

  5. #5

    Join Date
    Nov 2009
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    Asuncion - Paraguay
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    71

    Re: arca swiss movimientos

    Guys, this weekend I'm updating the data with your recommendations. Thank you for your advice


    Enviado desde mi iPhone utilizando Tapatalk

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