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Thread: Question about a Heliar Lens 18cm F4.5 #124934

  1. #1
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    Question about a Heliar Lens 18cm F4.5 #124934

    I just purchased the above lens. The glass and iris is in great shape, but the stop numbers on the barrel are not readable. I would love to how the stops are marked and if they are standard numbers used today.
    Any information would be helpful, including how to get the number readable or how to make the stops.
    Thanks

    Jack

  2. #2

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    Re: Question about a Heliar Lens 18cm F4.5 #124934

    Is the barrel engraved with the stop numbers?
    One man's Mede is another man's Persian.

  3. #3

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    Re: Question about a Heliar Lens 18cm F4.5 #124934

    Is it mounted in an old "dial set" Compur?

    My 150mm is hard to read, I used a white china marker / grease pencil to make the numbers stand out a bit more.

    The numbers on mine are not standard f-stops either. I don't have it in front of me, but I recall something like f 4.5, 6.3, 9, 12, 18 ???

  4. #4
    loujon
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    Re: Question about a Heliar Lens 18cm F4.5 #124934

    My 30-36cm Heliars scale reads f 4.5-6.3-8-11-16-22-32. My 48cm reads f 4.5-6.3-8-12 -18- 25.

    I guess they vary a bit from age of manufacture and which plant they manufactured in and for what market.

    BTW #D.R.P. 124934 is the German Patent #and probably not your serial #. I think you should post your True serial # so you can try and find the f stops used in Heliars of the same age.
    Last edited by Louis Pacilla; 24-May-2012 at 12:50. Reason: add

  5. #5

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    Re: Question about a Heliar Lens 18cm F4.5 #124934

    Wow, I just got my cheapy Heliar in today.
    150mm f4.5, in Compur shutter, #519500
    Anywho, my f stops are legible, 4.5, 6.3, 9, 12, 18, 25.
    Mine needs cleaning.

    Oh, AFTER posting, I see you say barrel, never mind my post then, sorry...

  6. #6
    loujon
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    Re: Question about a Heliar Lens 18cm F4.5 #124934

    Quote Originally Posted by buggz View Post

    Oh, AFTER posting, I see you say barrel, never mind my post then, sorry...
    Hey buggz, I don't think it should matter if it's in barrel or shutter as he knows his spacing of the stops and no math needs to be done. He simply needs to know how Voigtlander ran their f stops scale. They ran them pretty much the same on both barrel and shutter from what I can tell.

    Most of all he needs to take the f stop numbers closest to the approximate year of manufacture of his lens.

    Or he could do the math

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    Re: Question about a Heliar Lens 18cm F4.5 #124934

    I think this is the lens number, I look it up, finding the mfg. date 1914. It is a barrel lens, no shutter.
    The numbers are not engraved, seems as if white paint of some sort, which is worn off, or gone for what ever reason.'
    Jack

  8. #8
    Scott Davis
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    Re: Question about a Heliar Lens 18cm F4.5 #124934

    I have a 240mm Heliar in shutter and the stops are 4.5, 5.6, 8,11,16,22,32. I used to have an older one in barrel and I think they were marked 4.5, 6.3, 9, etc. I know I've seen that other set of markings on some other older voigtlander products before, and I think my old Rodenstock Rapid Aplanat is marked that way too - it starts at f7, and all the stop markings are 1 stop down based on f7 as a starting point (7, 14, 25, 50, 100, etc). It's a little off-putting until you realize they're full stops but instead of calibrating to common numbers, they're just stops down from lens maximum.

  9. #9
    loujon
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    Re: Question about a Heliar Lens 18cm F4.5 #124934

    Quote Originally Posted by northcarolinajack View Post
    I think this is the lens number, I look it up, finding the mfg. date 1914. It is a barrel lens, no shutter.
    The numbers are not engraved, seems as if white paint of some sort, which is worn off, or gone for what ever reason.'
    Jack
    You may want to post a digi snap of your barrel. This will make it a bit easier for folks to more accurately help you.

    and BTW- My 48cm was made around 1911 serial # 108.904 and has the scale markings of f 4.5-6.3-8-12-18-25.

  10. #10

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    Re: Question about a Heliar Lens 18cm F4.5 #124934

    Strange that some have 4.5, 6.3, then 8, 12, 18, 25
    Whereas mine shows, 4.5, 6.3, then 9, 12, 18, 25

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