enlarger light sources

Discussion in 'Darkroom Developing and Printing' started by nick, Jan 10, 2004.

  1. nick

    nick Guest

    Often I have opinions to offer here but this time a question.

    I would like a higher output lamp for my Beseler 45. My 1974 Aristo 40
    Watt with a modern V54 Aristo lamp is only one stop slower than my new
    (2003) Aristo D2 Hi with V54 lamp. As I now work with TCN400(.52 base
    density) and warm tone papers with HQ warm tone 1:20 the exposure
    times at f5.6 or f4 are still unpleasantly long. Aristo sales told me
    they understood the problem but had no call for products with more
    output.

    Question to all:

    Are there other light sources on the market that would fit my Beseler
    and give me 2 to 3 stops better than the D2 Hi?

    I have a 20 amp circuit and could easily mount whatever heat sink
    might be required.

    Nick
     
    nick, Jan 10, 2004
    #1
    1. Advertisements

  2. If you have the original condenser head for this enlarger
    I suggest you try it. The condenser concentrates much more
    of the light from the source lamp giving a much brighter
    image than a diffusion source of any kind, cold light or
    other. While the brightness of the diffused source is the
    same all over, the degree of magnification for 35mm is more
    than for larger formats so intensity of the light at the
    baseboard is less for the same size print. Because a
    condenser source concentrates the light from the source on
    the entrance pupil of the lens it tends to increase the
    effective intensity for smaller formats.
    I have an Aristo head for my Omega D2v. I also find it
    results in marginal intensity for 35mm while having greater
    intensity for 4x5 than the condenser system. This is one
    reason I switched back to the condensers.
    The condenser head will probably get your printing times
    back to being reasonably short. You can also use a larger
    lamp (PH212 rather than the standard PH211) but you should
    install heat absorbing glass if you do so.
    I like printing times of around 20 to 40 seconds.
    Sometimes longer times are necessary if one is doing
    complicated burning or dodging but longer times bring an
    increased problem with vibration.
     
    Richard Knoppow, Jan 10, 2004
    #2
    1. Advertisements

  3. nick

    Norman Worth Guest

    Aristo makes a number of different lamps for its various heads. Check with
    them. The one to choose depends mostly on the paper you use. You can get
    quite high intensity using graded paper and their original bluish lamp, but
    you will have troubles with VC.
     
    Norman Worth, Jan 11, 2004
    #3
  4. nick

    nick Guest


    Richard,

    Not the message I wanted to hear. A couple of years ago when I changed
    to VC I gutted my old condenser head and perch my Aristo on top of the
    bottom section with the filter drawer. A most convenient arrangement.
    Assuming I can pick up a used condenser head for a reasonable price it
    would be no problem to change heads when going from 2 1/4 or 4x5 to
    35mm. What would be the yield? 20-40sec exposures are fine but I want
    the higher output to be able to use f stops of 8 to 11 rather than the
    5.6-2.8 I am stuck with now. Vibration for me is a non issue as my set
    up is so heavy as to be almost earthquake proof.

    Looking at my posting I see I goofed on the problem of film density. I
    use TCN400 for 35mm because of the lack of grain. The base densities
    are .55 or so. Recently I tried Plus X with Acufine and that desity is
    ..25. This accounts for my long exposure times with my dilute warm tone
    materials.

    thanks,

    Nick
     
    nick, Jan 11, 2004
    #4
  5. nick

    nick Guest


    You are quite right Norman. When I went to VC a few years ago my high
    base density 35mms were virtually unprintable and on consulting Aristo
    purchased from them a v54 lamp which was no brainer to install in my
    old D2. Last year i got the D2hi hoping it would be much better than
    the old one but it is only one stop. They have nothing better than the
    D2Hi and I don't want to return to graded papers

    nick
     
    nick, Jan 11, 2004
    #5
  6. nick

    MXP Guest

    I have just started using my Omega D6 for making Ilfochrome with contrast
    masks.
    This requires a lot more light than if no contrast mask is used. Using a
    Rodagon WA
    60/4 I can get the head close to the print to get more light. At apperture
    5.6 the exposure
    time is approx. 20 sec. The lamp is a 250W halogen. I think this lamp has
    more light
    output than a traditional B/W lamp?
    So one suggestion could be that use switch to use a Color enlarger. It is
    easy to use
    the color head as a multigrade head. The paper manufactures has tables on
    how to
    set the color head filtration. But you probably knew that........
    But the idea to get a wide angle lens to have the head close to the print
    could be an idea?

    Max
     
    MXP, Jan 11, 2004
    #6
    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.