How do I know if a 50mm lens will fit my Durst m670 bw?

Discussion in 'Darkroom Equipment' started by Helinophoto, Nov 30, 2011.

  1. Helinophoto

    Helinophoto Member

    Messages:
    666
    Joined:
    Aug 19, 2011
    Location:
    Norway
    Shooter:
    Multi Format
    Hi

    I am on the lookout for a 50mm lens for my Durst m670 blacka dn white, but looking at eBay left me no smarter really.

    How do I know if the lens will actually fit my enlarger, if the lens is from Nikon or another brand?

    Is the lens "mount" som kind of standard on enlargers in general?

    I have a 110mm lens on mine now and it works perfectly for 6*6 and 6*7, but not for 35mm negs, the enlargement only goes up to just short of 20cm*30cm.


    Need some help on how to get the correct lens, would be a shame to buy something that actually didn't fit =)
     
  2. Rick A

    Rick A Subscriber

    Messages:
    7,443
    Joined:
    Mar 31, 2009
    Location:
    northern Pa.
    Shooter:
    Multi Format
    You need to know what size lensboard you have. Does it accept standard 39mm ltm or 25mm threaded lenses, also is the lensboard threaded or does it require a jamb nut(retaining ring)that screws on from the rear of the board after inserting the lens. I can help you out in either case with a lens, PM me here at Apug if you are interrested.
     
  3. Helinophoto

    Helinophoto Member

    Messages:
    666
    Joined:
    Aug 19, 2011
    Location:
    Norway
    Shooter:
    Multi Format
    Thank you for your answer =)

    I think it just screws in there, I can check the dimensions of the current lens when I get home. (bought the enlarger 2-3 weeks ago and I am not very familiar with the lens stuff, past experience has been with 35mm enlargers only....and that was in 1988 =D ).

    Kind regards
     
  4. Steve Smith

    Steve Smith Member

    Messages:
    9,092
    Joined:
    May 3, 2006
    Location:
    Ryde, Isle o
    Shooter:
    Medium Format
    It's fairly common for enlargers of that size to have a 39mm thread. A lot of lenses have the same thread but they also come with a 25mm thread. In this case, an adaptor ring is used: http://www.photographyattic.com/product-1372


    Steve.
     
  5. Trond

    Trond Subscriber

    Messages:
    734
    Joined:
    Jul 21, 2004
    Location:
    Harestua, Norway
    Shooter:
    Multi Format
    It's most likely 39mm. I have a Vivitar VHE 50mm 2.8 (made by Schneider I think) which you can get for free if you are interested. Where in Norway are you located?

    Trond
     
  6. Paul Howell

    Paul Howell Member

    Messages:
    2,761
    Joined:
    Dec 23, 2004
    Location:
    Phoeinx Ariz
    Shooter:
    Multi Format
    You may need a recessed lens board for your 607, my 601 requires a recessed. Do you have the owners manual?
     
  7. Helinophoto

    Helinophoto Member

    Messages:
    666
    Joined:
    Aug 19, 2011
    Location:
    Norway
    Shooter:
    Multi Format
    No owners manual, the enlarger is as-is from the guy who sold it, unfortunately =)

    Trond, the lens I have is 39mm (diameter) across (122mm around), screws in and out, do you think it will fit?
    I live in Oslo ^^
     
  8. paul ron

    paul ron Member

    Messages:
    1,881
    Joined:
    Jan 22, 2004
    Location:
    NYC
    Shooter:
    Medium Format
    Regardless if it is a 25mm and your lens is larger, just file the hole out n use a jamb nut.

    .
     
  9. Jerevan

    Jerevan Subscriber

    Messages:
    2,034
    Joined:
    Nov 19, 2004
    Location:
    Sweden/Germany
    Shooter:
    35mm
    Most probably the lens is going to fit. The 670 we had in the lab had 39 mm lensboards. I think they (the boards) are relatively common. I have never seen a Nikon 50 with anything else than 39 mm thread, but I know some older Schneiders had 25 mm thread.
     
  10. Trond

    Trond Subscriber

    Messages:
    734
    Joined:
    Jul 21, 2004
    Location:
    Harestua, Norway
    Shooter:
    Multi Format
    Sent you a PM.

    Trond
     
  11. Helinophoto

    Helinophoto Member

    Messages:
    666
    Joined:
    Aug 19, 2011
    Location:
    Norway
    Shooter:
    Multi Format
    Wow, huge thanks to Trond, who gave me such a lens for my enlarger, what a guy! =)