Beseler 23C-II Dual Dichro Color Head

Discussion in 'Darkroom Equipment' started by sanking, Sep 8, 2006.

  1. sanking

    sanking Member

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    I want to print some 6X9 B&W negatives with a Beseler 23C-11 equipped with a Dual Dichro S color head. The color head has a Sylvania 300 watt bulb, #J498.

    The unit prints very slow, about two stops slower than when I print with the original condenser head with its 75 watt bulb.

    Is this normal? Are bulbs available for the Dual Dichro S color head that print faster?

    Sandy King
     
  2. Chan Tran

    Chan Tran Member

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    It would print much faster if you switch it over to condenser mode. If you buy it used you may not have all the parts to switch between condenser and diffused mode. Basically to operate in diffused mode you need the honey comb light integrator and the diffusing chamber for the correct negative size. To operate in condenser mode you would use the condensing lenses from the old B&W head and the cone light integrator.
     
  3. sanking

    sanking Member

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    Hi Chan,

    Thanks very much for your response. I originally installed the Dual Dichro S color head in diffusion mode because I wanted to use it that way. However, as I recall I bought the color head new and should have all of th parts and the instruction manual to swtich over to condenser mode. I probably will, since printing is very, very slow in the diffusion mode.


    Sandy King
     
  4. childers-jk

    childers-jk Member

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    I have the same enlarger, and I am considering going back to a condenser head. The enlarger is wonderful, but it takes a long time to get exposues. I think this is common with the 23C.
     
  5. ricksplace

    ricksplace Member

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    I have the same rig. I switched back to condensor mode, and use contrast filters in the filter drawer above the condensor lenses. MUCH shorter exposure times than the dicro head. More contrasty than the diffusor head too. Dust and scratches on your negs will show up more too.