PetaPixel

How to Create a Homemade Large Format Pinhole Camera Using a Shoebox

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This camera is a poor man’s large format camera. It is made with a simple shoebox acting as a dark room.

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The lens is a simple glass meniscus (convergent lens) that I found in an old focal doubler. The lens has a focal length of 120mm and thus a large image circle. These simple lens gives large aberrations so once need to place a small aperture in front to minimize distortions of the image.

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Then I use some black cardboard paper and punch it with a biopsie tool. The hole is 1.5mm in diameter that gives an aperture of f/90. It is something between a pinhole (f/150) and a camera with a real lens (f/64)

The lens is attached in front of the punched hole with some patafix (adhesive putty tabs).

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The camera is a simple box. I build it to have a distance of about 120mm between the lens and the back. The 10x15cm photo paper is attached in the back with patafix. It is loaded in red light. Photo paper has a sensitivity of about 6 ASA, so with the small aperture f/90, exposure time is quite long — about 30s for EV 11. The shutter is made with a simple piece of paper sliding in front of the hole.

The paper that has been pre-exposed 2s is developped and then scanned and inversed. The result is quite sharp compared with a standard pinhole:

sample1

sample2

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You can find a full set of sample photos in this Flickr set.


About the author: Benoit Charlot is a photographer based in Montpellier, France. Visit his website here. This post originally appeared here.