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Thread: Need info on "Alphax Synchro" shutter

  1. #1
    Drew Bedo's Avatar
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    Oct 2006
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    Need info on "Alphax Synchro" shutter

    I have a Wollensak 15' f5.6 lens in an Alphax Sychro shutter. . . .but no retaining ring.

    Trying to figure out what ring it needs. What shutter size is this, #4 or #5, and what are the specs for the thread?

    A proper ring will cost over $50.

    Is there a hardware store workaround at hardware store prices?
    Drew Bedo
    www.quietlightphoto.com
    http://www.artsyhome.com/author/drew-bedo




    There are only three types of mounting flanges; too big, too small and wrong thread!

  2. #2

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    Re: Need info on "Alphax Synchro" shutter

    It’s an Alphax #4; needs a 2.62”x30tpi flange or retaining ring. I don’t know of any off the shelf substitutes.

  3. #3
    Peter De Smidt's Avatar
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    Fond du Lac, WI, USA
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    Re: Need info on "Alphax Synchro" shutter

    Does a Betax No. 4 use the same ring?
    “You often feel tired, not because you've done too much, but because you've done too little of what sparks a light in you.”
    ― Alexander Den Heijer, Nothing You Don't Already Know

  4. #4

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    Re: Need info on "Alphax Synchro" shutter

    Betax #4 flange/ring is interchangeable with the Alphax.

  5. #5

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    Re: Need info on "Alphax Synchro" shutter

    Get a piece of PVC pipe very slightly too small in diameter. Screw the shutter into it, then remove the shutter and cut off the threaded portion. This mounting ring will last as long as you do. Another alternative is a piece of model plywood (probably 8-11 ply) and do the same thing.

  6. #6

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    Re: Need info on "Alphax Synchro" shutter

    Quote Originally Posted by Jim Noel View Post
    Get a piece of PVC pipe very slightly too small in diameter. Screw the shutter into it, then remove the shutter and cut off the threaded portion. This mounting ring will last as long as you do. Another alternative is a piece of model plywood (probably 8-11 ply) and do the same thing.
    Have done this many times to test out lenses. I also put a ring of glue from a hot glue gun around the threads on the inside of the lens board. Very secure mounting of a shutter or a barrel lens onto the lens board, and the glue is easily removable.

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