Beseler 23C & Zone VI lamp head

Discussion in 'Darkroom Equipment' started by pasmithaty, Apr 14, 2012.

  1. pasmithaty

    pasmithaty Member

    Messages:
    1
    Joined:
    Apr 14, 2012
    Shooter:
    Medium Format
    Do the Zone VI lamps wear out? Is there a bulb that needs to be replaced? I was given this 23 C enlarger and it seems to work well, but recently used an enlarger at a public dark room and the light source seemed stronger -- printing at F16 and 22 with only 11-12 sec exposure -- far less exposure than what is require for my Beseler/Zone VI lamp head.
     
  2. ic-racer

    ic-racer Member

    Messages:
    7,483
    Joined:
    Feb 25, 2007
    Location:
    Midwest USA
    Shooter:
    Multi Format
    Were you printing with a condenser head at the public darkroom?
     
  3. john_s

    john_s Subscriber

    Messages:
    1,107
    Joined:
    Nov 19, 2002
    Location:
    Melbourne, A
    Shooter:
    Medium Format
    The "bulb" is actually a tube and yes, they do wear out eventually. They can be a bit dim when using 35mm negatives because a large part of the light output is wasted because it is wide enough for medium format negs (up to 2inch x 3inch I think). I used to use a 4inch x 5inch one and it was dim for 35mm but quite good for 4x5.