Enlarging lens with M23,5x0,5 mount

Discussion in 'Enlarging' started by Hamster, Jun 29, 2009.

  1. Hamster

    Hamster Member

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    I have just got myself a Meopta Opematus 6x6 enlarger. The unit itself seem to be very good quality and even have auto focus (rail).

    The Opematus comes with an uncoated 4/75mm Belar lens, think it is tessar type.

    SO I have two questions:

    1, Will the autofocus work with a 50mm lens, I am eager to do some large 35mm prints. There is a find adjustment, but I don;t think it will compress the bellows enough to allow a 50mm lens to focus properly. Anyone with experience?

    2, What are the names to look for if I want t get myself a 50mm lens? I know about Belar and Anaret, but the 23,5mm thread seems to be rather difficult to find. I know there is a converter, costs about 6eur, but I think it will add more displacement and makes using 75mm and shorter difficult.
     
  2. archphoto

    archphoto Member

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    If the enlarger allows you: make the hole bigger and fit a 39mm ring with tread......
    Or get a 42mm ring with an adapter to 39mm. (old Praktica or Zenit)

    I should have a 39mm ring in Holland, but I wouldn't be back untill somewhere in August.

    Peter
     
  3. ath

    ath Member

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    Do I get this right that you have a lensboard with 23.5mm thread? If so, go to www.fotoimpex.de and ask for a 39mm lensboard.
     
  4. Stan160

    Stan160 Member

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    You don't give a location, but if you are in the UK I recommend contacting http://www.silverprint.co.uk. They either stock, or can obtain on short notice, a range of Meopta parts. As ath says, you need to ask for a 39mm lensboard to accept most enlarger lenses.

    Both Meopta lensboards that I've owned are recessed. They are used one way up with a 50mm lens to hold the lens closer to the negative, and the other with longer focal lengths.

    Ian
     
  5. Trond

    Trond Subscriber

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    I don't think any Meopta Opemus have autofocus. They do have a focus help function that works like a rough guide, and it works regardless of focal length. You still have to fine focus the normal way.

    The Opemus is a very nice, simple and compact enlarger. I'm using a Opemus IIa myself.

    Trond
     
  6. Hamster

    Hamster Member

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    Mine isn't an Opemus, it is an Opematus! Accroding to Meopta, it is a product from the 1940-1945 and it is definitely mechanical autofocus! I was surprised how old it was considering the excellent condition it is in.

    Internet search didn't turn up much. The lensboard is fixed and not the reversable type. Seems I am a bit stuck with making smaller 35mm prints.

    Here's a photo I found on the net. Mine had a extra section under the lamp where there a drawer to put filters. Also there is a condenser.

    http://foto.bazos.sk/inzerat/1741068/Zvacsovak-OPEMATUS.php
     
  7. ic-racer

    ic-racer Member

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  8. Trond

    Trond Subscriber

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    Sorry! I misunderstood. The Opematus seem like an interesting enlarger. I suppose the only way to find out if it will focus with a 50mm is to try it out. The Anaret is inexpensive.

    Trond