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Thread: DIY top hat lensboard extension

  1. #1

    Join Date
    Oct 2017
    Location
    Tulsa, OK, USA
    Posts
    14

    DIY top hat lensboard extension

    Hey all,
    I was in search of a lensboard extension and came across
    https://rafcamera.com/ They make many adapters and tubes etc.
    I had a spare Copal #3 lensboard and the hole is standard 65mm,
    Knowing this gave me the idea to build my own top hat extension using parts from RafCamera
    Here is what I ordered from them.

    60mm extender for M65x1 thread
    https://rafcamera.com/extender-m65x1-60mm
    M65x1 female to M65x1 male thread adapter (30mm long extender)
    https://rafcamera.com/adapter-m65x1f-to-m65x1m-30mm
    41.6mm to M65x1 thread adapter for shutters, wide
    https://rafcamera.com/adapter-41-6mm-to-m65x1-85mm
    Lens board (lens flange) for M65x1 focusing helicoid, round
    https://rafcamera.com/plate-m65x1-round-d82


    Cost me $134, and a couple weeks shipping.
    All the components fit together well. And are well made.
    I have used this for my Fuji 400T on a Toyo 45AX to get that extra bellows depth.

    Here are some pictures.
    Click image for larger version. 

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  2. #2

    Join Date
    Mar 2004
    Location
    San Francisco Bay Area
    Posts
    368

    Re: DIY top hat lensboard extension

    90mm of extension must make front tilt/swing very sensitive? It looks like a robust solution and a lot more elegant than things I put together from ABS plumbing parts!

  3. #3

    Join Date
    Aug 2000
    Location
    California
    Posts
    3,190

    Re: DIY top hat lensboard extension

    When I needed to do this with a 4x5 Anba, I just used a soup can with correct size hole in the bottom and spot soldered, then black taped to lensboard. Worked well and I use it for years.

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