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Thread: Hermagis Eidoscope no#3 1:5 aperture Scale?

  1. #1

    Join Date
    Jul 2006
    Posts
    93

    Hermagis Eidoscope no#3 1:5 aperture Scale?

    I have Hermagis Eidoscope no#3, with aperture 5 6 7 10 14 20
    does anybody know what number of aperture is this in modern aperture scale?

    Thanks
    Haryanto
    quiet-light.blogspot.com

  2. #2

    Join Date
    Jul 2006
    Posts
    93

    Re: Hermagis Eidoscope no#3 1:5 aperture Scale?

    I already see this thread, but didn't find it
    http://www.largeformatphotography.in...-Hermagis-lens
    quiet-light.blogspot.com

  3. #3

    Re: Hermagis Eidoscope no#3 1:5 aperture Scale?

    It is the modern scale, just not the points you are used to. So, assuming it is a linear scale (my Eidoscope is) f5.6 is a little more than half way between 5 and 6, and f11 is a quarter of the way between 10 and 14...

  4. #4

    Join Date
    Jul 2006
    Posts
    93

    Re: Hermagis Eidoscope no#3 1:5 aperture Scale?

    Thank you Jason
    quiet-light.blogspot.com

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