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Thread: Make your own helical focus mount

  1. #1

    Join Date
    Mar 2005
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    Make your own helical focus mount

    Hi there: making my own sinar handy with parts. Would like to know if anyone has used a bronica etrs lens helical or the removeable bronica S2 helical for ther own project. I have never seen an S2 helical so I don't know much about them. I am wondering which one would be better to use. I am using a fuji 65mm lens. So which bronica lens should I buy in mm?
    Thanks Darcy

  2. #2
    Joanna Carter's Avatar
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    Oct 2006
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    Plestin-les-Grèves, France
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    Re: Make your own helical focus mount

    If you are building a Sinar, with bellows, why would you also want a helical focusing mount?
    Joanna Carter
    Grandes Images

    UKLFPG

  3. #3

    Join Date
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    Montgomery, Il. USA
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    Re: Make your own helical focus mount

    It's a "handy" not a full featured camera, just a P&S.

  4. #4

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    Re: Make your own helical focus mount

    I could really do with a helical mount for the Anschutz I modified...

    Some people use SLR lens helicals, bigger the better. Raid a parts box at a camera shop?

  5. #5

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    Mar 2005
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    Re: Make your own helical focus mount

    The slr helical is too small. The rear element of the 65mm lens wont fit in a SLR helical.

  6. #6

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    Re: Make your own helical focus mount

    Rodenstock makes helical focusing mounts for most of their lenses from 23mm to 150mm if the FFL of your Fuji lens matches the FFL of a Rodenstock 65 then the helical will work for your lens and properly reach infinity and have the correct distance and DOF scale. If not check against the SA 65mm. If it matches that then the Schneider helical for their 65 will work. Or get the Rodenstock or the Schneider 65 and the correct helical and sell your lens and save a lot of headaches.

  7. #7
    neophyte
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    Oct 2004
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    Australia
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    234

    Re: Make your own helical focus mount

    Options:
    1. try get a helical from a med format thrasher body/lens and adapt $cheapish
    2. buy a dedicated one from one of the name manufacturers as above $lots
    3. buy a no-name one on a linhof board from ebay for about $125ish
    4. buy a helical cone from gaoersi or similar for mounting a LF lens on one of their bodies and adapt $300ish

    You are likely to need to do a little adjusting unless as Bob says you have the exact flange-film distance of the rodenstock or schneider lenses on your fuji.
    "In the field of observation chance favours the prepared mind" -- Pasteur

  8. #8

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    Mar 2005
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    66

    Re: Make your own helical focus mount

    I am building this thing to with as little cost as possible. Doityourselfers tend to do that. If I was to get the name brand helicals, it would defeat the purpose and I may as well buy a full fledged sinar handy. The original questions were about the bronica helicals nothing else. But thanks for trying to be helpful.
    Darcy

  9. #9

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    Oct 2008
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    Summerville, SC
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    Re: Make your own helical focus mount

    I saw one helical salvaged from a large SLR zoom lens used in this manner. I don't think they used the focusing helical, but the zoom helical, which seemed to be bigger. The person bought the zoom lens from KEH, from the bargain bin. If I remember correctly, they paid less than ten dollars for it, since it was deemed usable for parts only. You may want to try that, since the cost is minimal.

    Jon

  10. #10

    Join Date
    Jul 2006
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    2,639

    Re: Make your own helical focus mount

    Darcy it will depend on what lens you look at. There are very big lenses out there.... for example Mirror-Tele

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