Zone VI 5x7 Type 2 Enlarger questions

Discussion in 'Darkroom Equipment' started by Jeff Bannow, Jun 8, 2011.

  1. Jeff Bannow

    Jeff Bannow Member

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    I may be getting a Zone VI type 2 enlarger (type 2 is the one with two posts sticking out of the head, right). My intention would be to use it exclusively for 6x17 enlarging.

    Does this head have adjustments for contrast grade? The compensating timer is included, but I don't see any way to change the contrast grades.

    Is there a power supply to worry about? I assume that is handled either in the head or in the timer.

    Replacement bulbs - are they available anywhere?

    This has the 44" column - what would the maximum print size be from a 6x17 negative? And since this is likely a factor of the enlarging lens, what lens would you use?

    Is that enough questions for now? I guess so.
     
  2. Ian C

    Ian C Member

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    I believe that the diagonal of the image rectangle of the 6 x 17cm format is 179mm.

    If so, then a 150/5.6 EL Nikkor or the newer 150/5.6A EL Nikkor should work.

    Here’s the coverage data in my EL Nikkor brochures.

    The original 150/5.6 lists a maximum coverage circle of 190mmφ.

    The 150/5.6A list maximum coverage circle of 180mmφ.

    Other lens makes should be similar, but might have slightly different projection angles.

    If you can provide the maximum negative-to-print distance and the dimensions of the window opening in the carrier (or mask), then the magnification and largest print that will fit into the projection can be calculated. Don't forget to provide for the height of the easel.

    Knowing the column length alone isn’t sufficient to determine maximum print size.
     
  3. Jeff Bannow

    Jeff Bannow Member

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    Interesting - do you think a componon-s 150mm would cover?
     
  4. Ian C

    Ian C Member

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    Possibly the 150/5.6 Componon-S will work, but the Schneider data that I have only shows “maximum negative size 90mm x 120mm”.

    That doesn’t address the question of the maximum diameter circle covered which is surely greater than the 150mm diagonal of a 90mm x 120mm rectangle.

    You could try it by mounting the lens on an enlarger of sufficient size and place a an object of 179mm in length onto the glass carrier and see if you can project a sharp image of the entire object centered under the lens.

    If you don’t have a glass carrier for your big enlarger, you could temporarily place the object on a glass plate and use it as a temporary negative to test the lens’s ability to project the image of the entire length of the object.
     
  5. Robert Hall

    Robert Hall Subscriber

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    Call Calumet in Chicago to see if they still have bulbs. It was my understanding to get them, you need to send the head to them and have them install them.

    Cheers,
     
  6. ROL

    ROL Member

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    If it's a VC head, then yes (blue and green tubes).

    It uses a Variable Contrast Contoller unit with the VC head, by which the intensity overall and separate blue (hard) and green (soft) tubes are adjusted by rheostat.


    Head.

    Good question.

    Probably 24" longest side, projected to its base. I use 180mm for 5x7. 150 might work on 17cm.

    I this enough answers, for now?
     
  7. Jeff Bannow

    Jeff Bannow Member

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    Thanks for the help!
     
  8. ic-racer

    ic-racer Member

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    I thought you were done getting more enlargers. If that is not the case then you need this :wink:. (link points to a DeVere Horizontal with goodies for very a reasonable price) http://www.largeformatphotography.info/forum/showthread.php?t=76818
     
  9. Jeff Bannow

    Jeff Bannow Member

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    You can never have too many enlargers! We need something bigger than 8x10 though. :smile: