Well, I’m camera obsessed. There’s no denying it. I was bored last weekend, so what did I do? I built myself a pinhole camera, that’s what. And not just any old pinhole camera, this one takes 120 roll film and produces 6cmx4.5cm negatives.
So why 120 roll film? Well, I wanted to make a pinhole camera that could take multiple shots, and I didn’t fancy just creating something like the dirkon 35mm pinhole camera.
I chose 645 format for the negatives because I wanted to make my pinhole camera as compact as possible. I personally prefer 6x6 square negatives, but that would have required a longer camera and possibly a slightly greater focal length.
Eventually I’ll get around to writing up the construction process in a bit more detail, but for now I’ll just say that the camera is made of 6mm thick, black foam core board. And is held together with PVA glue and black electrical tape. The shutter and red window cover are made of 3mm black card left over from mounting some photographs. The pinhole is made from a piece of aluminium cut from a can of Dr. Pepper and ground down with fine sand paper.
And now for some technical details (probably innacurate as I’m not 100% sure of the size of the pinhole):
<table> <tr> <td>Focal Length</td> <td>40mm</td> </tr> <tr> <td>Pinhole Diameter</td> <td>~0.3mm</td> </tr> <tr> <td>fStop</td> <td>~f150</td> </tr> <tr> <td>Film Size</td> <td>60mmx45mm</td> </tr> <tr> <td>Angle of View</td> <td>~86 degrees</td> </tr> </table>
All these figures were calculated using the Mr. Pinhole website