vignetting with beseler 67c

Discussion in 'Darkroom Developing and Printing' started by C. Falise, Oct 28, 2004.

  1. C. Falise

    C. Falise Guest

    hi all-
    i'm a new poster to this ng. i've been reading for a while - it's
    refreshing to know somebody else besides myself is still committed to the
    wet darkroom.
    cheers.
    anyhooo-
    i've been using my workhorse beseler 67sc with the condenser head for years.
    i print mainly bw 6x6 med format. (i used to print bw and color ra4 and ep2
    etc for a living - bw is still my first love...). i've noticed significant
    vignetting lately. it's always been an issue, but i worked around it ok.
    still do. i've got a system down!
    but, i would like to eliminate this problem if possible without replacing
    the enlarger. i have messed around with all i can mess around with on the
    darned thing, but still get the vignetting. i'm using 50 and 80mm nikon
    lenses as appropriate that are in pristine condition. bellows seem in good
    shape too - no sagging etc.
    i've done google searches, and looked at forums but have found little in
    terms of how to fix this.
    is it fixable?
    any ideas?
    thanks.
    -christina
     
    C. Falise, Oct 28, 2004
    #1
    1. Advertisements

  2. If this is a new problem, look for something out of place in the condenser
    area.
     
    Michael A. Covington, Oct 28, 2004
    #2
    1. Advertisements

  3. C. Falise

    C. Falise Guest

    nothing out of whack that i can see.
    it's not a new problem.
    i've just noticed it more lately i guess. sometimes it gets annoying.
    i've seen old posts on other boards describing the same problem - but nobody
    knows (that i could find anyway) what to do about it. it might just be a
    quirk.
    any other ideas? maybe i should just ditch it and get a new enlarger - i've
    thought about a cold head for a while. not sure if i want to pay for one
    though...
    -c.
     
    C. Falise, Oct 28, 2004
    #3
  4. Is there anything in the condenser head that adjusts for size of negative or
    focal length of lens, the way there is in the 23C?
     
    Michael A. Covington, Oct 28, 2004
    #4
  5. C. Falise

    Tom Phillips Guest


    The edge fall off you get using a 67 for 6x7 is always
    an issue. I would think there is some adjustment in the
    condenser housing for changing formats, but the 67 isn't
    what I would choose if 6x6 or 6x7 were my standard format.
    It's essentially a 35mm enlarger that can be used for 6x7,
    but not ideal for 6x7.

    You might try Beseler about any possible format adjustments
    if your manula lists none.

    http://www.beseler.com/
     
    Tom Phillips, Oct 29, 2004
    #5
  6. C. Falise

    John McGraw Guest

    Dear Ms. Falise
    #1 solution is to get a "D" series Omega ;-)
    Seriously, I'm pretty sure this very problem in a long thread in the
    last month. If not the last mo. no more than 2 mos ago. I think that
    definitive solutions were given. IIRC the poster solved his problem.
    As much as I don't care for Bessler enlargers, one thing I'm certain
    about is, this is not normal & can be corrected w/o buying another
    enlarger.
    First I would visit Besslers site & download diagrams & instructions
    for your enlarger.
    Second, read the instructions & study the diagrams, looking in
    particular for the condenser & light bulb instructions.
    Third w/ hard copies of the above, take the enlarger apart. Look for
    any damaged material. Also look for parts #s particularly on the
    condensers. You may have the wrong condenser installed.
    Somewhere there has to be something wrong that's fixable.
    Good luck, John
     
    John McGraw, Oct 29, 2004
    #6
  7. C. Falise

    RWatson767 Guest

    Christina
    On the back of the panel covering the condenser assembly you will find an
    illustration showing exactly the correct configuration of the condensers.

    Another recommends upgrading to an Omega D enlarger. A D2, 5 or 6 would be a
    great improvement. The D3 and D4 are autofocus. With these you need to be
    careful to get one with the correct focusing guides/cams.

    Bob AZ
     
    RWatson767, Oct 30, 2004
    #7
  8. C. Falise

    Dan Quinn Guest

    RE: "C. Falise" <>

    I think that very odd; a BESELER 6x7 that won't cover the 6x6
    format. I'd start with the light bulb and work down.
    I encountered reverse vignetting a few years ago with a Meopta
    6x6 dichro. Light fall off was centered. I could hardly believe my
    eyes. I concluded that the light house's bottom diffuser
    was overly thick.
    BTW, I've an extra Omega B8 6x9. It is in very good condition.
    It has been completely dismantled. If interested let me know. Dan
     
    Dan Quinn, Oct 30, 2004
    #8
  9. C. Falise

    dr bob Guest

    When I had this sort of problem - maybe not exactly similar to yours - I
    found that I has left the 35mm condenser in place. That is the smaller lens
    in the uppermost position.

    Truly, dr bob.
     
    dr bob, Nov 1, 2004
    #9
  10. (Dan Quinn) wrote in
    With a conventional diffuser enlarger, the solution would be to move the
    light source closer to the diffuser -- more difference in path length
    between center and corners, and more aspect angle change, will both tend to
    increase the falloff on light to the diffuser that the center filtering on
    the diffuser is intended to correct.

    With a dichro head, however, I'd suspect that the wrong diffuser plate was
    present; if I correctly understand how dichro heads work, there shouldn't
    be any need for a center filter spot on a diffuser for a dichro head.

    --
    The challenge to the photographer is to command the medium, to use
    whatever current equipment and technology furthers his creative
    objectives, without sacrificing the ability to make his own decisions.
    -- Ansel Adams

    Donald Qualls, aka The Silent Observer http://silent1.home.netcom.com

    Opinions expressed are my own -- take them for what they're worth
    and don't expect them to be perfect.
     
    Donald Qualls, Nov 1, 2004
    #10
  11. C. Falise

    Dan Quinn Guest

    Wrong diffuser; that may be true. The diffuser located on the
    bottom of the mixing chamber is contoured and is overly thick
    in the midsection. Light fall off fell in a prints center. Dan
     
    Dan Quinn, Nov 2, 2004
    #11
  12. Indeed -- that's what I'd expect in a cheap, single-diffusing enlarger
    like the Federal I had 30 years ago, but not what I'd think to find in a
    nice dichro.

    --
    The challenge to the photographer is to command the medium, to use
    whatever current equipment and technology furthers his creative
    objectives, without sacrificing the ability to make his own decisions.
    -- Ansel Adams

    Donald Qualls, aka The Silent Observer http://silent1.home.netcom.com

    Opinions expressed are my own -- take them for what they're worth
    and don't expect them to be perfect.
     
    Donald Qualls, Nov 2, 2004
    #12
  13. C. Falise

    Tom Phillips Guest

    Beselers are _not_ "cheap" enlargers.

    Ansel Adams used one. And so do I. Want to compare
    prints, Donald?

    I have many made on both a 67 series and an MXT...
     
    Tom Phillips, Nov 2, 2004
    #13
  14. Tom, are you illiterate, or just a troll?

    Read again what I wrote (quoted from your quote, for your convenience:
    "not what I'd think to find in a nice dichro."

    IOW, reiterating that a center weighted diffuser isn't correct for a
    Beseler which, as you say, is *not* a cheap enlarger like the Federal I
    owned 30 years ago.

    I'm afraid I can't accept a challenge to compare prints -- my Omega D2V
    with Zone VI head (but unfortunately without the original condenser
    elements) is waiting in the corner behind me, but I don't have a work
    space set up yet. Ask again in six months, I should have something,
    though I doubt it'll match up to anything made by someone who has
    actually printed in the last twenty years -- the last time I made a
    print was in about 1981.

    --
    The challenge to the photographer is to command the medium, to use
    whatever current equipment and technology furthers his creative
    objectives, without sacrificing the ability to make his own decisions.
    -- Ansel Adams

    Donald Qualls, aka The Silent Observer http://silent1.home.netcom.com

    Opinions expressed are my own -- take them for what they're worth
    and don't expect them to be perfect.
     
    Donald Qualls, Nov 2, 2004
    #14
  15. C. Falise

    Tom Phillips Guest

    No. I read O.K. This thread is about _beselers_,
    and the OP doesn't have a dichro...

    If you weren't refering to beselers, I recant.
    As I said.
    Zone VI is a decent head. I'd expect good prints...
     
    Tom Phillips, Nov 2, 2004
    #15
  16. The OP doesn't, but Dan Quinn, to whom I was replying, mentioned the
    dichro in a Meopta he had, which had an incorrect diffuser:
    At no point did I call a Beseler cheap. At no point did I associate
    dichro heads with cheap. I called my old Federal cheap -- and it was; I
    paid $1.25 at a yard sale, about 1972, and it was old then.
    Yep, good equipment -- but I'm twenty years out of practice; no more
    time and money than I have to spend on photography, it might be more
    than six months before I can make "good" prints as compared to
    "adequate" prints. First, I need a place to work, then I need to spend
    a hunded bucks or more on paper, VC filters, and a little bit of
    additional equipment. Then I need to spend some time in the dark and
    make some prints.

    --
    The challenge to the photographer is to command the medium, to use
    whatever current equipment and technology furthers his creative
    objectives, without sacrificing the ability to make his own decisions.
    -- Ansel Adams

    Donald Qualls, aka The Silent Observer http://silent1.home.netcom.com

    Opinions expressed are my own -- take them for what they're worth
    and don't expect them to be perfect.
     
    Donald Qualls, Nov 2, 2004
    #16
  17. C. Falise

    Dan Quinn Guest

    He was speaking of the Meopta I purchased four years ago.
    I bought the 6x6 dichro because the 6x6 Meopta condenser I
    bought in 1960 at a local shop was such a good value and
    I think did a good job.
    I did think of a fix for the dichro. Using pencil or pen
    and trial and error, I could have increased the edge density
    of the bottom diffuser.
    They turn out an old world product; a number of castings
    and I think heavy sheet. Currently and AFAIK, they do not
    have a US distributer. Dan
     
    Dan Quinn, Nov 2, 2004
    #17
  18. C. Falise

    Mfu

    Joined:
    Jun 6, 2018
    Messages:
    1
    Likes Received:
    0
    Hi Christina

    I’m at my wits end! I too am having massive vignetting at all apertures with my 67dichro Head when using my 80mm lens for a 6x6 neg. it’s fine with a 50mm lens. Did you have any luck fixing yours?

    Sincerely

    M
     
    Mfu, Jun 6, 2018
    #18
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.