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  1. #21

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    I will have it made any size that works best.

  2. #22
    David A. Goldfarb's Avatar
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    In that case, I'd look for a 4x5" enlarger, rather than a Beseler 23c, and make the negative 4x5" and use a 150mm lens. A bigger enlarger can have a bigger light source, reducing exposure time, and the larger negative will give you a sharper image.
    flickr--http://www.flickr.com/photos/davidagoldfarb/
    Photography (not as up to date as the flickr site)--http://www.davidagoldfarb.com/photo
    Academic (Slavic and Comparative Literature)--http://www.davidagoldfarb.com

  3. #23

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    Cutting test strips is going to be a pain.

  4. #24

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    To add to David's comment about the light source, a 23C dichro head won't give you much light, especially at the scale you're working in. I'd stay away from color heads altogether.

  5. #25
    Ian Grant's Avatar
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    Quote Originally Posted by vdonovan View Post
    Cutting test strips is going to be a pain.
    What you do is have some metal plates prepared & painted to approx match the concrete's colour & use these as test strips, leant against the concrete for exposure. Coat & process well away from the main surface to prevent contamination.

    You just want an enlarger head, so ideally a scrap enlarger for parts. If you were in the UK I'd sort out something for you. You could even use an old 5x4 camera, all you need is the focussing mechanism, the light source is very simple & easy to make.

    Ian

  6. #26

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    When I pour the large piece I will pour several smaller pieces to use as test strips.
    I think I would rather use the same material to test. I would hate to have to this again because of some unforeseen problem with compatibility.

  7. #27

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    I am quite fascinated with this project (not that I am going to emulate it!) and I hope you are going to document it in some way as I think it would be interesting and potentially useful to others

  8. #28

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    Ian
    Have a look at Item number: 220313364222 on US Ebay. Is this what I am looking for?
    bnstein
    I will keep a written log and see what I can do for photo's. WARNING: I am no photographer and use an old canon Power Shoot 35.
    With the holidays coming up and the need to find photo equipment, I doubt if I will even start the project for a couple of months.
    I have everything for the actual concrete pour and polishing.
    There is still a lot of testing to do even after I get the equipment.

  9. #29
    David A. Goldfarb's Avatar
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    That's a 6x9 enlarger head, and you would still need a lens of around 90mm to make it work for 6x9.

    You might try craigslist for nearby cities to see if you can find a 4x5" or larger enlarger. They can often be had for cheap or even free these days, but shipping can get expensive.
    flickr--http://www.flickr.com/photos/davidagoldfarb/
    Photography (not as up to date as the flickr site)--http://www.davidagoldfarb.com/photo
    Academic (Slavic and Comparative Literature)--http://www.davidagoldfarb.com

  10. #30

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    What size lens should I be looking for for 5x4 neg?

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