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Thread: Open Source 3d Printable Medium Format Pinhole Camera

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  1. #1

    Join Date
    Mar 2013
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    Open Source 3d Printable Medium Format Pinhole Camera

    Hi I just started a indiegogo campaign to fund the development of my design for a 3d printable medium format pinhole camera. You see it here. http://www.indiegogo.com/projects/op...amera/x/490700 Click image for larger version. 

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  2. #2

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    Re: Open Source 3d Printable Medium Format Pinhole Camera

    I'm curious, how are you going to secure light-tightness? I just found out recently the hard way that, e.g., the Black Strong Flexible material available from Shapeways is pretty much translucent, at least at 1 mm thickness, and completely useless for photographic work that requires seal from light without some kind of postprocessing.

  3. #3

    Re: Open Source 3d Printable Medium Format Pinhole Camera

    I found that three thin air-brushed layers of mat black paint on the inside of the "natural" 3d material is light tight.

  4. #4

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    Re: Open Source 3d Printable Medium Format Pinhole Camera

    This is let "someone else Do It", rather than D-I-Y!
    We have had these approaches before - how is this different from a Ponzi scheme?

  5. #5

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    Re: Open Source 3d Printable Medium Format Pinhole Camera

    I've printed test parts in black pla at 3mm thickness and with a full infill setting and it was completely light tight by itself.

    If you have a printer it will be a diy , especially when you make the springs and bellows.

    I really don't see how its related to a ponzi scheme, ponzi schemes usually involve financial invest for financial gain. On my campaign you could buy a pretty low price camera and receive a camera with alot of features you cant normally find for as cheap as this.

  6. #6

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    Re: Open Source 3d Printable Medium Format Pinhole Camera

    In spite of all the words (like "open source" etc.) you use, this is still a selling activity you are engaged in.

    This has no place here and I hope the Moderators are active to-night!

  7. #7

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    Re: Open Source 3d Printable Medium Format Pinhole Camera

    If this is a medium format camera and not large format I'm curious as to how
    you're going to address the longevity of the film advance mech ?

  8. #8
    Roger Cole's Avatar
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    Re: Open Source 3d Printable Medium Format Pinhole Camera

    Well it's not Ponzi that I can see. It's not LF though, and it is in an LF forum. I really don't know the rules for things like Indigogo and Kickstarter and such here, but I don't see anything wrong with the idea whatever the particular local rules are.

  9. #9

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    Re: Open Source 3d Printable Medium Format Pinhole Camera

    After I finish this one I will convert it for larger formats and 35mm.

    The film advance mechanism is very solid, it consists of 4 parts, the top of the body , knob, the knob washer and the spring. The spring is a torsion spring that fits tightly around the knob and the arm of the spring fits into a slot in the top of the body. So when you advance the film it loosens the spring and allows it move forward, and when you let go it tightens and doesn't allow backwards movement. It allows very tiny adjustment, like factions of a mm, with no backwards movement. This part has been printed and tested when I had access to a 3d printer. You can download the parts here. http://www.thingiverse.com/thing:11057

    Click image for larger version. 

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    Picture doesnt show the spring or the knob washer/bolt that is press fitted.

  10. #10

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    Re: Open Source 3d Printable Medium Format Pinhole Camera

    Quote Originally Posted by matthewd View Post
    After I finish this one I will convert it for larger formats and 35mm.

    The film advance mechanism is very solid, it consists of 4 parts, the top of the body , knob, the knob washer and the spring. The spring is a torsion spring that fits tightly around the knob and the arm of the spring fits into a slot in the top of the body. So when you advance the film it loosens the spring and allows it move forward, and when you let go it tightens and doesn't allow backwards movement. It allows very tiny adjustment, like factions of a mm, with no backwards movement. This part has been printed and tested when I had access to a 3d printer. You can download the parts here.
    Do you have a full up working prototype ?
    I'm just curious as how it'll hold up in real life use, most inexpensive desktop 3D printers
    don't use the strongest plastics, considering that the advance mech will take the brunt of
    the work I would say that acetal plastics would hold up better than ABS.

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