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  1. #1
    5stringdeath's Avatar
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    Omega B22 Diffuser Material for Filter Holder

    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. #2

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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. #3
    ic-racer's Avatar
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    Neutral density filter.

  4. #4
    5stringdeath's Avatar
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    Quote Originally Posted by Bob-D659 View Post
    Just use the 80mm condenser with the 50mm lens, no column height adjustment required, or you could always buy a lower wattage bulb.
    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 Been awhile since I've used a straight up condensor enlarger.

  5. #5
    ignatiu5's Avatar
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    Quote Originally Posted by ic-racer View Post
    Neutral density filter.
    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. #6
    5stringdeath's Avatar
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    Re: Omega B22 Diffuser Material for Filter Holder

    Thanks sounds easy and logical!

  7. #7
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    http://www.bhphotovideo.com/c/produc...2_Neutral.html

    Just picked one out of the blue, there are several others.
    DARKROOM AUTOMATION
    f-Stop Timers - Enlarging Meters
    http://www.darkroomautomation.com/da-main.htm



 

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