Bronica SQ-A Extension Tubes

Discussion in 'Medium Format Cameras and Accessories' started by mkiernan, Oct 4, 2009.

  1. mkiernan

    mkiernan Member

    Messages:
    80
    Joined:
    Mar 1, 2005
    Location:
    NSW, Austral
    Shooter:
    35mm
    I have purchased a S-36 Extension tube for an SQ-A on E-Bay. I have used 2 rolls of film with little success. The first was grossly over-exposed (developed as black). The second was exposed normally, but the focus was well out. I focused as normally using the view-finder surround image (the split screen center was just black). I am hoping that there is some trick to focusing that I am just not yet aware of. Being an E-Bay purchase I don't have access to a manual. Is someone able to direct me to some information so that I can sort out these problems without wasting too much film?

    Much appreciated.
     
  2. glbeas

    glbeas Member

    Messages:
    3,307
    Joined:
    Sep 25, 2002
    Location:
    Roswell, Ga.
    Shooter:
    Multi Format
    You need to figure in your bellows factor for the increased extension which for an 80mm is about a stop if you are metering handheld. You should be focusing wide open, if the lens is not doing that there may be a problem with the mechanical coupling. The overexposure may be due to a bad coupler too, not shutting down for the exposure. Get it checked by a competent repairman.