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  1. #1

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    Ideas for light blocking material for enlarger

    It was determined in another thread that the light source on my Beseler 23c II is too bright. I've done some research and find people recommending a light bulb with less wattage, but no one knows where to get such an animal. The other option is to use a ND filter.

    The filter compartment on the 23c is 5.5x5.5". I'd rather not mount a filter under the lens. ND filters of that size would cost more than the enlarger is worth. I'm going to need to dampen the light by 3 or 4 stops.

    Does anyone know of a more economical light dampening material, that won't affect the color of the light?

    Thanks,
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    Kenton Brede
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  2. #2

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    What is the number of the bulb you are using now?

  3. #3

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    Quote Originally Posted by jbrubaker View Post
    What is the number of the bulb you are using now?
    I'm on the road ATM so can't tell you the number. The original that came with it is a GE bulb. The one I bought online was specifically for my enlarger. Both bulbs have the same output.
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    Kenton Brede
    http://kentonbrede.com/

  4. #4

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    If you are using 75 watts bulb, you shouldn't be having that problem in the first place.... What are the symptoms you are experiencing? Do you not get a reasonable exposure time with lens stopped down to say, f/8 or so?
    Develop, stop, fix.... wait.... where's my film?

  5. #5

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    Quote Originally Posted by tkamiya View Post
    If you are using 75 watts bulb, you shouldn't be having that problem in the first place.... What are the symptoms you are experiencing? Do you not get a reasonable exposure time with lens stopped down to say, f/8 or so?
    It's 75 watts. The issue is having to print at f/22 or f/32 for a 8x10" prints.

    It's covered on this thread:

    http://www.apug.org/forums/forum48/1...st-winter.html
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    Kenton Brede
    http://kentonbrede.com/

  6. #6

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    Edit:

    This is the one I bought:

    http://www.adorama.com/LMPH140.html
    Last edited by kbrede; 01-22-2013 at 09:56 PM. Click to view previous post history.
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    Kenton Brede
    http://kentonbrede.com/

  7. #7
    MattKing's Avatar
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    A piece of unexposed or slightly fogged 8x10 film cut to size might serve as an appropriate ND filter.
    Matt

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  8. #8
    fotch's Avatar
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    That looks like the right bulb. Do you have a longer lens, maybe raising the height?
    Items for sale or trade at www.Camera35.com

  9. #9

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    Please explain what materials you are using such as paper, graded vs. variable contrast, film etc. I have the same enlarger and get 10-20 second exposures at f5.6 to f11 using Tri-X 120 negatives with Ilford variable contrast filters (usually #1-1/5 to #3) on Adox and Ilford VC papers with the standard enlarger bulb. If I were to print with a fast graded paper and a thin negative I can imagine possibly needing less light. I have flexible neutral density material available if I ever need it. The ND material comes in a roll. You cut a piece to fit into the filter drawer above the negative sandwiched with the VC filter. The ND material is not expensive and should be available at stores like B&H. However, I looked on their website tonight and could not find it. Maybe another member can provide the proper name and where to buy it.

    I wonder if your negatives are too thin?

  10. #10

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    Quote Originally Posted by fotch View Post
    That looks like the right bulb. Do you have a longer lens, maybe raising the height?
    It's an 80mm El-Nikor.
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    Kenton Brede
    http://kentonbrede.com/

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