The PiKon (Disruptive Technology) Telescope is based on the Newtonian Reflecting Telescope. This design uses a concave mirror (Objective) to form an image which is examined using an eyepiece. The mirror is mounted in a tube and a 45 degree mirror is placed in the optical path to allow the image to be viewed from the side of the tube.
The PiKon Telescope is based on a very similar design, but the image formed by the Objective is focused onto the photo sensor of a Raspberry Pi Camera. The camera sensor is exposed by simply removing (unscrewing) the lens on the Pi Camera. Because of the small size of the Raspberry Pi Camera board, it is possible to mount the assembly in the optical path. The amount of light lost by doing this is similar to the losses caused by mounting the 45 degree mirror in a conventional Newtonian design.
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