Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,331   Posts: 1,537,238   Online: 894
      
Results 1 to 9 of 9
  1. #1
    S.larsson's Avatar
    Join Date
    Mar 2012
    Location
    Sweden, England and Germany
    Shooter
    Multi Format
    Posts
    27

    Making a lensboard

    I've just procured a Durst 606, It's great apart from the fact that I need a lens board for my secondary enlarger lens. It's a 50mm, 39mm (leica) lens thread and ideally needs an Ixotub. As I've found out the hard way they are very expensive and hard to come by. Does anyone have any recommendations on how to make one?

    Regards from Sweden,

    Stephan

  2. #2

    Join Date
    Nov 2002
    Location
    Melbourne, Australia
    Shooter
    Medium Format
    Posts
    982
    I'm not familiar with the Durst, but an alternative to a threaded board is a slightly larger hole and a 39mm threaded ring (jam nut) instead. If the board is a simple shape maybe it could be cut from sheet stock for (or by) you.

    SRB could make one for you but I don't know the likely cost.

    Edit: I've just searched for ixotub and it's much more complicated than the flat boards with which I'm familiar (Beseler). It's the difference between Europe and the USA!
    Last edited by john_s; 03-08-2012 at 06:05 PM. Click to view previous post history.

  3. #3
    John Austin's Avatar
    Join Date
    Oct 2010
    Location
    Southern Forest Region, Western Australia
    Shooter
    Large Format
    Posts
    521
    Blog Entries
    3
    Use the WTB classifieds, especially if time is a crucial factor (if you enjoy working with bits of metal ignore this idea)

  4. #4
    paul_c5x4's Avatar
    Join Date
    Apr 2009
    Location
    Ye Olde England
    Shooter
    Large Format
    Posts
    1,456
    Images
    23
    Does it have to be an Ixotub or will some of the other Durst recessed lens boards fit ?

    There is a recessed lens board on ebay at the moment (#290679079821) located in Germany - The seller doesn't give much info, but it might be worth asking what the outside diameter is.

  5. #5
    Leigh B's Avatar
    Join Date
    Jan 2011
    Location
    Maryland, USA
    Shooter
    Multi Format
    Posts
    1,035
    Images
    1
    Hi Stephan,

    I strongly recommend using a retaining ring made for the lens in question.

    Reason: There are three different M39 "Leica" threads, and they're not inter-matable.

    The original was 39mm major diameter but with an English 26tpi 55° Whitworth thread.
    You'd need to find a pretty good machine shop to cut that thread, as it's not common.

    The other two variants commonly encountered are:
    Russian M39x1
    Canon M39 x 24tpi 60°

    - Leigh
    Last edited by Leigh B; 03-08-2012 at 08:44 PM. Click to view previous post history.
    “Wise men talk because they have something to say; fools, because they have to say something.” - Plato

  6. #6
    ic-racer's Avatar
    Join Date
    Feb 2007
    Location
    Midwest USA
    Shooter
    Multi Format
    Posts
    6,195
    From what I can tell the more common thread for the Ixotub was 25mm but here is one with a bigger hole than that on ebay with a starting bid of $9.99 : It looks a little odd, maybe it is not threaded and would require a retaining ring as suggested above. http://www.ebay.de:80/itm/ws/eBayISA...d=321993282832

    What would I do? I'd get a common 25mm Ixotub and a 50mm lens with 25mm threads. Those 50mm f4 Componons with 25mm threads should be inexpensive.

    Last edited by ic-racer; 03-08-2012 at 09:26 PM. Click to view previous post history.

  7. #7
    Leigh B's Avatar
    Join Date
    Jan 2011
    Location
    Maryland, USA
    Shooter
    Multi Format
    Posts
    1,035
    Images
    1
    I would expect an original M39 Durst board to have the correct thread.

    My comment was addressing the situation where the board had a smaller hole (e.g. 25mm) or none at all,
    so the hole would need to be bored and tapped by a machine shop.

    - Leigh
    “Wise men talk because they have something to say; fools, because they have to say something.” - Plato

  8. #8
    S.larsson's Avatar
    Join Date
    Mar 2012
    Location
    Sweden, England and Germany
    Shooter
    Multi Format
    Posts
    27
    Hi everyone, thanks for all your replies! I've contacted a machine shop to have one made, It'll cost me about €50 under-the-table to make and should fit my specifications exactly. I've left them my lens too so they can make sure the thread fits perfectly. The Lens is a Kowa 2.8/50mm and I'm hoping they will be able to tap that thread out for me.

  9. #9
    S.larsson's Avatar
    Join Date
    Mar 2012
    Location
    Sweden, England and Germany
    Shooter
    Multi Format
    Posts
    27
    To anyone who's interested, I had a lens board made and it works great! I still have the blueprints for it if anyone wants to make their own Ixotub



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin