Filter Thread for Voigtlander Avus Skopar

Discussion in 'Medium Format Cameras and Accessories' started by Michael W, Apr 25, 2007.

  1. Michael W

    Michael W Member

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    I recently bought a Voigtlander Avus 6.5 x 9 cm camera.
    Would appreciate if anyone can tell me what type of filters (brand, size) will fit the lens.
    It is a Skopar f/4.5 105mm lens.
    The thread is on the inside of the tiny lens hood. I have never seen this design before but it must have been common once.
    Measures 26mm across the front.

    Are there current production filters available to fit a lens like this, or am I searching for old stock?
     
  2. Ole

    Ole Moderator Staff Member Moderator

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    The old folders generally take slip-on filters, and don't really have a filter thread designed as such. It's the thread for mounting the lens elements.

    All of mine are made for slip-ons - the AVUS 9x12 (135mm Skopar), the Bergheil 9x12 (150mm Heliar), the 6.5x9 VAG (105mm Voigtar) and the 6.5x9 Bergheil (120mm Heliar).
     
  3. Michael W

    Michael W Member

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    Thanks for that info, Ole. Have to admit that I've never heard of slip on filters before. Is there a place where I can buy them new, or do I need to search the second hand markets?
    Also, are there IR filters available in this style? I like the idea of shooting some Infra Red with my Avus.
     
  4. Roger Hicks

    Roger Hicks Member

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    Check 'push on' as well as 'slip on'. Both terms were used and if you're doing a search you'll double your chances that way. Yes, there were IR push-ons but they must be vanishingly rare.

    There are a few tiny thread sizes, though, from about 18mm upwards and (for example) both A36 (push-on) and screw-in filters (about 22 mm from memory) for 50/3.5 Leica Elmars.

    Make sure the bellows are IR-tight, too. They probably are but they might not be.

    Cheers,

    R.
     
  5. Abbazz

    Abbazz Member

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    Usually, folding cameras don't take screw-in filters, because the filter has to be unmounted prior to closing the camera. It would be to cumbersome to unscrew the filter every time you need to close your camera and it is much easier to take off a slip on filter.

    Slip on filters may be hard to find, especially IR filters. You might have to use some kind of universal filter holder, like the ones from Cokin.

    Cheers,

    Abbazz
     
  6. Michael W

    Michael W Member

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    Thanks all, very helpful. I know what I'm looking for now.
     
  7. Ole

    Ole Moderator Staff Member Moderator

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    I'm using a Lee Gel-Snap holder for most of the folders - at least those I haven't gotten around to looking for filters for (I have a box full of various old filters, and almost as many folders).

    The only exception is the Zeiss Ikon Ikonta 524 (IIRC), which can be closed with the (push-on) filter installed. So most of the BW I shoot with that camera is shot with a yellow-green filter. :smile:
     
  8. Michael W

    Michael W Member

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    Is that the 4" x 4" Lee holder?
    I'll have to test one out. My camera lens is just 27mm across so I was thinking the rubber band might not be tight enough.
     
  9. Ole

    Ole Moderator Staff Member Moderator

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    The Gel-Snap is the rubber band thingy, yes. :smile:

    With very tiny lenses and lenses which are flush with the shutter body, there's a little trick that works evry well with folding cameras: Don't use the rubber band at all. Just place the filter on the bed, and lean it against the lens!

    That's how I shot all but two of my LF IR shots so far. :D