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Pinhole Camera Can
A camera with a pinhole aperture and no lens
The most basic form of a camera in which no lens is used. A pinhole camera is made by making a lightight container and poking a pinhole in the front of the camera where a lens would go.
A camera whose lens is covered except for a pin-sized hole. You have a very small aperture, so you have to shoot long exposures.
A pinhole camera is a simple camera without a lens and with a single small aperture -- effectively a light-proof box with a small hole in one side. Light from a scene passes through this single point and projects an inverted image on the opposite side of the box.
Pinhole Camera Negative and Positive
Cleaning out my basement and came across a box from a workshop I did about 25 years ago. The workshop was making and using a Pinhole Camera. The Pinhole Camera was a empty coffee can that was painted black inside. The paper (5"x7") that would become the negative was loaded into the camera in a darkroom.
Here is one example of a negative and positive from that workshop.
The negative was formed on a sheet of photography paper. After it was developed (darkroom skills) the positive was created by contact with the negative.
Pinhole camera - accident
Oops! My pinhole camera takes ordinary 35mm film (which is handy) and has a very rudimentary winding on mechanism. Quite how rudimentary you can see from this unwitting double exposure. All the same I quite like the effect.
The foreground is cows grazing on Brean Down in Somerset; the background is the Gilbert White House museum at Selborne in Hampshire.