Switch to English Language Passer en langue franšaise Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 75,148   Posts: 1,658,150   Online: 680
      
Results 1 to 4 of 4
  1. #1

    Join Date
    Jan 2008
    Shooter
    Medium Format
    Posts
    29

    CONDENSER COVERAGE

    Hi all,
    I have recently married a standard 150 watt "BESELER 45MX" condenser lamphouse, to the negative stage of a rescued "DEVERE 504" enlarger. (the colorhead on the DEVERE was missing).

    Both condensors on the BESELER are at the standard fixed distance from each other in the BESELER lamphouse, and the lowest condenser on the BESELER is about 1 centimeter (1/2 inch) above the negative plane on the DEVERE, and is attached directly to the DEVERE negative stage without the use of the normal intervening bellows between condenser housing and negative stage. (Please see the attached jpg file)

    Film coverage is Ok, and was easy to check. But would anybody out there know of an empirical method of testing this setup to check whether the condensers are giving the optimum illumination for a 4x5 film format?.

    Thanks for your time.

    Deryck
    Attached Thumbnails Attached Thumbnails BESELER-DEVERE.jpg  

  2. #2
    Ian Grant's Avatar
    Join Date
    Aug 2004
    Location
    West Midlands, UK, and Turkey
    Shooter
    Multi Format
    Posts
    16,859
    Images
    148
    The condensers need to be only slightly wider than the negative diameter, The critical part is the placement of the bulb above the condensers to give even lighting.

    Use a light meter to measure the intensity on the baseboard at the edges/corners and centre.

    Ian

  3. #3

    Join Date
    Feb 2009
    Shooter
    Large Format
    Posts
    697
    Ask someone who owns the Beseler 45M condenser enlarger to measure the distance D from the negative to some easily-accessed feature on the condenser head when the head is adjusted for proper coverage for the 4” x 5” format.

    Then you can adjust the position of your Beseler 45M condenser head on the DeVere 504 so that the carrier-to-reference point is the same dimension D.

  4. #4
    Wade D's Avatar
    Join Date
    Feb 2006
    Location
    Jamul, CA
    Shooter
    Multi Format
    Posts
    900
    Images
    3
    Your set up should be fine. On my 45MX the bottom condenser is about 1 inch from the negative when set for 4x5. The higher settings (farther from the film) are for correspondingly smaller formats.



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  Ś   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin