C11.17 Prototype Test

Discussion in 'Large Format Cameras and Accessories' started by jb7, Jul 1, 2013.

  1. jb7

    jb7 Member

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    This might be of some interest to one or two people here-


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    C11.17 prototype at Shiprock NM by joseph - jb7, on Flickr


    Taking the first picture on the new (prototype) Carbon Fiber and Walnut packet loading multi format 11x17 folding studio camera at Shiprock, New Mexico at dawn yesterday. Desert testing. Didn't go too badly, got some valuable feedback from the exercise. Loaded with 11x17 Kodak X-ray film. The camera was designed to take advantage of the image circle of a lens, to shoot 11x14 and 7x17 without reducing backs. An interesting side effect is the aggregate format, 11x17, which is easily cut down from 14x17...
    The smallest size you might consider using on it might be 8x10, perhaps to shoot the odd sheet of colour film on your holidays, for example. Though I forgot to pack the little bit I have...

    11x17 Folding studio camera? Does that sound a bit odd? Did any studio camera fold? This one has been designed to accept heavy lenses, although it hasn't been tested with one yet. I have placed a 9.25kg 36" f/6.3 at the end of the front extension without appreciable deflection, though I haven't mounted it on a lens board yet - a 9" board, Century size. I have one waiting for it, that Eddie Gunks very generously donated to the project last year, in New York.

    The camera has front tilt and swing which can be controlled from behind the back, although with a lens that heavy, I think only downward tilt will be available, if any. I'll be back in Dublin in a couple of weeks and will try it out then-

    It has an integral dark cloth, suspended from a closing lid which is necessary for shutting off the back of the camera while making an exposure; the focusing screen must be displaced to allow the film holder to register.

    Bellows, up to 43 inches available on accessory rear extended tubes, around 36" in this configuration. I should be able to use a 90mm for circular images too, on the recessed board in the picture- though movements are restricted below about 250mm-

    Anyway, first look, a lot of testing to be done yet, although the film loading into the camera has passed with flying colours. The camera was designed and built in Ireland, but desert testing has shown up some shortcomings in some of the materials and adhesives used- I just wouldn't have appreciated how cruel the sun can be outside of our temperate little isle...
     
  2. LensGeek

    LensGeek Member

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    wow, looks awesome! I'm actually in the middle of constructing a Walnut + Brass full plate camera. Would love to talk more about building cameras with you!

    For one, Why on earth you pick Carbon Fibre?
     
  3. Reinhold

    Reinhold Subscriber

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    Most impressive!

    You picked a good place and time of the year to test for sun and heat resistance...

    Your white clothing made you reasonably comfortable in that sun.
    Just think how hellish it must have been inside those black bellows.
    An outer cover of slate gray or aluminized fabric would look "non-traditional", but it would significantly reduce IR, UV, and heat stress on the adhesives and coatings.

    Reinhold
     
  4. wildbill

    wildbill Member

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    because it's heavy, weak, and doesn't look cool.
     
  5. jb7

    jb7 Member

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    Same as Vinny, for its ironic properties. Well, it's not really like irony, but it's not much like silvery or goldy either...

    Had a look at your wet plates, very nice...

    Reinhold, thanks, yes black is pressure testing alright. Not only is it on the bellows, but on the lifting lid and cape; they could easily be aluminized silver- I'll have to make a version.

    Would like to try one of your lenses on it too, they look good...
     
  6. jb7

    jb7 Member

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    Production Prototype ...

    I see this has been referenced in another thread here, so just in case anyone is interested in a new camera design-
    This is a design for a new ultra light weight camera system, using new ultra light weight film holders.

    Just to be clear, standard holders will not work in this system-

    The camera being prototyped at the moment is a multiple format camera, up to and including 8x12-
    so it will also take 8x10, 7x11, 5x12, and 6x12 in their own dedicated holders, without a reducing back.
    Only some of these formats are ULF, of course.

    You can read more about it at carboncameras.com
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