Antarctica

Antarctica
by ʇolɐǝz ǝɥʇ qoq

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1

I've had success in the past with CCTV lenses mounted to webcams in place of their original lenses. The tricky part is securely and accurately mounting the two together - we had a part machined for one application, but I've also used the front of a dead CCTV camera and lots of glue. The positioning has to be correct in three dimensions to work well. As ...


1

It would be possible to use any small telescope or monocular or one side of binocular. You figure out a way to allow mount one of these devices to your webcam. The lens of the webcam is positioned to peer into the telescope/binocular. This method is called "afocal". The name comes from the fact that the image forming rays from the telescope/binocular exit ...


-1

A numerical example For years 35mm film cameras dominated. The image size was 24mm by 36mm. let us assume we want a 20mm high image of a 2,0 m high object at a distance u in front of the camera. Provided u is at least 10 times bigger than the focal length f, the ratio of image height to object height is approximately f/u, thus 20mm/2m = f/u, hence ...



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