View Full Version : A Practical 360 pinhole camera

12-27-2005, 02:11 PM
After designing 4x5 and 8x10 PinPlus basic cameras design, and made 6 focal lengths of each. *My friend, and mentor Don challenged my to design a different pinhole camera. *The challenge was excepted to make a 360 degree pinhole camera. *Looked through the internet, no real help. Now the design starts. *Camera Single column in the center of rotation for the recording medium to be wraped around. Note! this Column/Film holder is non rotating. Next the camera body. *the pinhole will rotate with the camera body around the recording medium, but each recorded view is reversed when recorded. The answer is to have the pinhole look into a first surface mirror at 45 degrees. this will reverse the image to be recorded. Now the image is corrected. The next is only 10 degrees of the horzional axis can be used, othrewise the pinhole image size for the longer focal length around the column will decress the sharpness. *The outer camera body is driven by a geared stepper motor. This stepper motor is given step counts from a homemade light meter that has the same look angle as the 45 degree mirror. *The light meter is a self contained meter with F.M. transmitter, and power source, which is mounted to the outer camera body. This no wires to wrap up or hide in a 360 degree sweep. *The stepper motor speed is set by the light meter. *In this way the camera body is speed is slowed down for shade areas, and increased for sun areas. The net result is a 6-7 stop maxinum correction for *correcting the 360 degree picture with some slideing offset. Therefore the image is not a flat light to dark picture.

Attached files http://f295.f295.org/uploads/im000850_6564.jpg (http://f295.f295.org/uploads/im000850_6564.jpg)

12-27-2005, 02:14 PM
The horzional picture width baffle shown.

Attached files http://f295.f295.org/uploads/im000852_301.jpg (http://f295.f295.org/uploads/im000852_301.jpg)

12-27-2005, 02:16 PM
Pinhole, mirror, and grear drive

Attached files http://f295.f295.org/uploads/im000855_224.jpg (http://f295.f295.org/uploads/im000855_224.jpg)

12-27-2005, 02:27 PM
my back yard a 330 degree picture. taken before light meter and stepper motor added. this picture is composite of about 230 revolutions of 360 degrees of rotation. A model motor was used for this mirror pinhole test.

Attached files http://f295.f295.org/uploads/3601pos_6948.jpg (http://f295.f295.org/uploads/3601pos_6948.jpg)