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  1. #11

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    Quote Originally Posted by Murray@uptowngallery View Post
    If one has to change condensers to mate with the
    lens f.l. (or really, the negative size, I guess), ...
    One need not change the condensers to mate with
    any lens focal length or any negative size PROVIDED
    the condensers are arranged so that full coverage of
    the largest format is assured.

    Additional condensation of the light to accommodate small
    formats is possible with some condenser enlargers. Small
    formats usually require greater magnification. To keep
    exposure times short the higher level of light over a
    small area is helpful. Dan

  2. #12

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    Without the variable condenser, you have the change the whole condenser assemby. At least if you want the full light for medium or small format negatives. With the variable condenser, you just slide it into the appropriate slot. And the rest of the condenser assembly stays in place.

  3. #13

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    I just bought a D2 two weeks ago. The variable condenser doesn't need to be changed, you just flip up the lamphouse door and move the tray that holds the condenser up or down. The specs on mine: 162mm lens remove the condenser, 135mm lens put it in top shelf, 90-101mm lens condenser on the middle shelf, and 50-80mm lens the condenser goes on the bottom shelf. My 150 is somewhere in between the first two, but the top shelf seems fine. I will have to test to see which is better.

    - Justin

  4. #14
    Murray@uptowngallery's Avatar
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    Thanks.

    Missed out on the auction anyway, but now I know more.
    Murray

  5. #15

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    One need not change the condensers to mate with
    any lens focal length or any negative size PROVIDED
    the condensers are arranged so that full coverage of
    the largest format is assured.


    This point has always confused me... So if I have a 4x5 condenser in place, it ought to work fine for smaller formats, except that the illumination will be weaker thus requiring longer exposure times? I tried this on my DII (non-V) setup but I got strange, uneven illumination. Should this imply that something other than a too-large condenser is my problem?

  6. #16

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    [QUOTES=laverdure;472856]
    One need not change the condensers to mate with
    any lens focal length or any negative size PROVIDED
    the condensers are arranged so that full coverage of
    the largest format is assured.


    "This point has always confused me... So if I have a 4x5
    condenser in place, it ought to work fine for smaller formats,
    except that the illumination will be weaker thus requiring longer
    exposure times?"

    That is correct. The smaller format negative may be considered
    the center section of some larger format negative.

    "I tried this on my DII (non-V) setup but I got strange, uneven
    illumination. Should this imply that something other than a
    too-large condenser is my problem?"

    It is not possible to have a "too-large condenser". It wouldn't
    fit. An incorrect condenser I'd think possible.

    You have a, one, condenser in place? Assuming two, they
    are not adjustable? There are no auxiliary condensers? What
    enlarging lens? How is the illumination when printing 4x5? Dan

  7. #17

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    Hi Dan thanks for your reply. I have the condensers for 35 and 4x5, but not the one between. By "too large" I meant using the 4x5 for 6x6 negatives. I have 75mm and 50mm enlarging lenses only, as I've never used this setup for 4x5, but I'll rig up a 135 LF lens and see what that does when I get home (on the road just now). The illumination I get using the 4x5 condenser and the 75mm (ektar enlarging) with 6x6 negatives seems fine at first, but when the position of the condenser is wiggled around around at all (as happens for instance if I raise and lower it, as if to change the negative) I notice the illumination levels changing all over the place. Sometimes, also, a semi-circular wavy ring pattern appears, reminiscent of the corrugated metal spacer between the two condenser lenses. Any ideas?

  8. #18
    Freneticist's Avatar
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    Reference the "lens cone". I have a DII VC and when I got it, the person had made a lens-cone from a Planters Peanut can. Perfect size diameter and length. He just taped it to a thin piece of aluminum cut like the original lensboard, and painted the interior flat black. At first I thought it was kinda cheesy, but have kept it because it works.

  9. #19

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    [QUOTES=laverdure;473155]
    "Hi Dan thanks for your reply. I have the condensers for
    35 and 4x5, but not the one between."

    Not so bad doing 6x6 where the magnification is not
    so very much. Similar to those with 6x6 or 6x7 enlargers
    wishing to work with 35mm and have no chance of altering
    the condenser arrangement. I've a Meopta 6x6; no chance.

    "The illumination I get using the 4x5 condenser and the 75mm
    (ektar enlarging) with 6x6 negatives seems fine at first, but when
    the position of the condenser is wiggled around at all (as happens
    for instance if I raise and lower it, as if to change the negative)
    I notice the illumination levels changing all over the place."

    "Sometimes, also, a semi-circular wavy ring pattern appears,
    reminiscent of the corrugated metal spacer between the two
    condenser lenses. Any ideas?"

    I worked and used the D2 for 6x6 with no problems. I now
    work with a B8, the 6x9 junior D2. My 6x4.5 negatives enlarge
    well. I've the 6x6 auxiliary but don't bother to use it.

    The mechanics of your enlarger's head need checking. The
    condenser is wiggled around ...? UP and Down is all that is
    permitted. On my B8 I keep the pinions supporting the
    condenser assembly a little loose. The assembly can
    then bottom all around on the negative stage. Your
    D2 may have the same pinion support. Dan

  10. #20

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    Thanks again Dan. It's true my DII is in pretty poor condition, and I haven't done much to tighten it up. Luckily I've got two DIIs in poor condition, so I'll have the parts. But the important thing is that now I know I don't need to buy another condenser, which will save me some time and money and trouble.

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