Omega B22 Diffuser Material for Filter Holder

Discussion in 'Darkroom Equipment' started by 5stringdeath, Apr 19, 2010.

  1. 5stringdeath

    5stringdeath Member

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    Wondering what material might be good for the filter tray in my B22 for a diffuser stage. I'm doing this mostly to lengthen my exposure times as I'm finding them too short when doing 35mm with my 50mm lens. I do realize I can just remove the 35mm condensor and print with an 80mm, which lengthens time but also means an increase in column height .....

    Anyhow I have a great local glass shop which could cut me a piece, but I'm not sure how thick it should be? Or are there some "around the house" materials that might work? Obviously I don't want anything to melt/burn so my first thougth was glass.

    I use under-lens MC filters for contrast, thus the filter tray is just sitting empty and seems like a perfect candidate for a diffuser.

    This is kind of a stop-gap until I find a cold light and/or Chromega B head
     
  2. Bob-D659

    Bob-D659 Member

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    Just use the 80mm condenser with the 50mm lens, no column height adjustment required, or you could always buy a lower wattage bulb.
     
  3. ic-racer

    ic-racer Member

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    Neutral density filter.
     
  4. 5stringdeath

    5stringdeath Member

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    This will lengthen exposure times? I thought this would shorten the times even more, if I removed the extra condensor for 35mm ..... Guess I'm thinking backwards :D Been awhile since I've used a straight up condensor enlarger.
     
  5. ignatiu5

    ignatiu5 Subscriber

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    To do what it seems you want (lengthen exposure times), I did what ic-racer has suggested. I ordered a gel sheet of ND2 from my local photo store, and then cut squares to fit the upper filter tray of my B-22 XL, either singly, or stacked to cut 1, 2, or 3 stops of light. It seems to work well for me, there doesn’t appear to be any heat effects from the lamp, and the below-the-lens tray is free for my VC filters.

    Might work for you also.
     
  6. 5stringdeath

    5stringdeath Member

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    Thanks sounds easy and logical!
     
  7. Nicholas Lindan

    Nicholas Lindan Advertiser Advertiser

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