Telephoto webcam

Whilst playing with my webcam tonight to try to get the mike to work – which I can’t, because I screwed up the audio settings somewhere, and it’s a real slog to get them back to normal – I noticed it was manually focused, and some quick experimentation confirmed that it could focus down to a point very close to the lens.

Sitting on the other side of the room is an old 260mm f/4 lens mounted on a tripod – it’s heavy enough that it needs the tripod mount on the lens rather than the camera body, and when I was done with it the other night I just left it there.

The webcam is just the right size to poke its lens inside the back of the larger one, so it was the work of a minute to fiddle the two focus rings and produce this:


…which is all very nice, and makes me feel I’ve sort of achieved something, but, well. It’s a camera lens, it has a real mount, I could wire up a real camera and get a photo which is about fifty times the size and without the lens barrel in it. From a practical standpoint, this is not the greatest of achievements.

I’m sure it must be useful for something, but right now I have no idea what. Perhaps I could tape them together and point it at the bird-feeder in the garden…

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