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Thread: 8x10 Slide Projector

  1. #11

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    Re: 8x10 Slide Projector

    Quote Originally Posted by Pere Casals View Post
    One important thing is to get a model of the overhead projector that has a focal length of the lens that's close to the one of the enlarger lens you want to use, this is because the fresnel in the bed is optimized for that range.

    Here there is the spec of some 3M models. file:///C:/Documents%20and%20Settings/P.PC6/Mis%20documentos/Downloads/9050.pdf

    Attachment 181963
    Attachment 181964
    Attachment 181965
    Attachment 181966

    Until now I used it with temporary (metrology) fixtures and a regular mirror, I'm to building that design that has to also be a test bed of a lightweight/amateur 8x10 horizontal enlarger, I want to test solar fresnels and first surface mirrors.
    You would get far better quality with one of the folding Liesegang or Elmo models.

  2. #12
    Randy Moe's Avatar
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    Dec 2011
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    Re: 8x10 Slide Projector

    Thanks Pere. Lenses I have.

    I will do more research. Beats setting up an Elwood for horizontal projection. Less space.

    The 9075 has two FXL - 82V, 410W and some models just one.

    I tried this 20 years ago with copier transparencies. We had a very high-end copier at that time. My source was Nikon Coolpix 100 0.3 mp

    Long before I even heard of LF.

    I now make positives by contact printing as I only did 11X14 reversals once with a guy who wanted to use my darkroom.



    Quote Originally Posted by Pere Casals View Post
    One important thing is to get a model of the overhead projector that has a focal length of the lens that's close to the one of the enlarger lens you want to use, this is because the fresnel in the bed is optimized for that range.

    Here there is the spec of some 3M models. file:///C:/Documents%20and%20Settings/P.PC6/Mis%20documentos/Downloads/9050.pdf

    Attachment 181963
    Attachment 181964
    Attachment 181965
    Attachment 181966

    Until now I used it with temporary (metrology) fixtures and a regular mirror, I'm to building that design that has to also be a test bed of a lightweight/amateur 8x10 horizontal enlarger, I want to test solar fresnels and first surface mirrors.
    TIN CAN COLLEGE

  3. #13

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    Re: 8x10 Slide Projector

    hello all!

    In the archives of this forum I found a similar discussion, in 2011

    LF(up to 8x10) slide projector-homebrewed
    http://www.largeformatphotography.in...tor-homebrewed

  4. #14
    Randy Moe's Avatar
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    Re: 8x10 Slide Projector

    Quote Originally Posted by Emmanuel BIGLER View Post
    hello all!

    In the archives of this forum I found a similar discussion, in 2011

    LF(up to 8x10) slide projector-homebrewed
    http://www.largeformatphotography.in...tor-homebrewed
    Of course it was tried before!

    Good idea to protect the slide.

    Rear projection is also an idea.
    TIN CAN COLLEGE

  5. #15

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    Re: 8x10 Slide Projector

    Im getting an overhead to try this out. This is brilliant. Randy, what do you mean with rear projection?

  6. #16
    Randy Moe's Avatar
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    Re: 8x10 Slide Projector

    Quote Originally Posted by pkr1979 View Post
    Im getting an overhead to try this out. This is brilliant. Randy, what do you mean with rear projection?
    You set up a semitransparent screen and project on one side and view from the other.

    Very common.

    I would put mine in one room and screen at the doorway.

    I would be, 'the man behind the curtain'...
    TIN CAN COLLEGE

  7. #17

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    Re: 8x10 Slide Projector

    A carrousel needs to be designed as well...

  8. #18
    Randy Moe's Avatar
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    Re: 8x10 Slide Projector

    Quote Originally Posted by pkr1979 View Post
    A carrousel needs to be designed as well...
    that's what the man behind the curtain does, change slides by magical hand... fakery
    TIN CAN COLLEGE

  9. #19

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    Re: 8x10 Slide Projector

    I once went to a performance art presentation that had a overhead projector that live bugs were dumped on for effect... Creepy!#!!

    Steve K

  10. #20

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    Re: 8x10 Slide Projector

    I too have used an overhead projector for this. A horizontal enlarger sounds like a better idea, if you could get enough light from one. Maybe some high powered LED’s would work. But I generally just play around with slides. The real trick is getting people interested in looking at slides. Free alcohol and food seems to help.

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