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Thread: Arca Irish 8x10*

  1. #1
    joseph
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    Arca Irish 8x10*

    * With apologies to those nice people in France, only joking...

    Let's see if I can make the pictures tell most of the story...

    I started with a Cambo SC back from ebay, after I was unsuccessful finding one here...





    Even before the back arrived I started work on the rear standard- I chose American Black Walnut, and made a rough frame.





    It was quite rough, all the 'precision' work was done with a plunge router-



  2. #2
    joseph
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    Re: Arca Irish 8x10*






  3. #3
    joseph
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    Re: Arca Irish 8x10*

    I made the hardware from bits of scrap Aluminium angle and channel-
    everything was prototyped a few times- none of these made it to the final version, and the sliding lock was completely redesigned for the final version-



    After some inspiration from an instructional post by Christopher D Keth here, I decided to grind my own glass-


  4. #4
    joseph
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    Re: Arca Irish 8x10*

    Very fortuitously, JB and Susan Harlin published a most comprehensive guide to bellows construction a little while before I took the project on- I think I've read all the others posted on the internet, and I think this is the best-

    http://www.jbhphoto.com/articles/article.htm





  5. #5
    joseph
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    Re: Arca Irish 8x10*

    I chose two layers of Book Cloth for the fabric and 0.5mm styrene for the ribs,
    and display mount as a contact adhesive.
    Individually, everything seemed supple and thin enough,
    but when laminated together, it's much stiffer than I'd like.

    That's the problem with prototypes...
    you don't really know until you've tried it-






  6. #6
    joseph
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    Re: Arca Irish 8x10*

    The bellows are made inside out on a form, and the material had a sheen to it, so it received a few coats of matte black spray paint-
    which didn't help the suppleness either, I suppose-

    Lessons for next time...



    Removing the bellows from the form was the point when I realized how stiff they were...




    However, the geometry was perfect, and For that I owe JB and Susan Harlin many thanks-

  7. #7
    joseph
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    Re: Arca Irish 8x10*

    The fixings for the rear standard were quite simple-
    wood screws and sheet aluminium, in four strips, shaped to the frame.

    Next time there will be a weight saving by using carbon fiber and titanium screws...





    For the front frame, I used an older flat Arca board, and chopped the centre out-



  8. #8
    joseph
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    Re: Arca Irish 8x10*

    I ended up using epoxy resin adhesive to glue the front frame-
    that thing is stuck fast...




    Well, that's most of the bits made-
    time for a beer I think...

  9. #9
    Wayne venchka's Avatar
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    Re: Arca Irish 8x10*

    I'm impressed. What? Not finished?
    Wayne
    Deep in the darkest heart of the East Texas rainforest.

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  10. #10

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    Re: Arca Irish 8x10*

    Great work--can't wait to see the finished camera.

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