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There is a M8 hole in the middle of the rod for the screw that holds the assembly together. Next the secondary mirror holder was done and little by little all other parts. Playing around with pitch is really something that takes some time to learn. In order to ensure good surface contact and abrasive distribution between the mirror and pitch tool the surface of the pitch tool must be grooved. Hence my mirror is actually 13 cm F7.

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Mirror making is really something you have to learn by doing

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Amateur Telescope Making Main Page

It was funny to see how my class mates were filing the same little key chains entire semester and I was building a telescope next to them. The main idea is to smooth all uneven surfaces and make such grinding strokes that they localize pressure at the centre of the mirror disk and hence result in rapidly the desired concave surface When I was only eight years old or so, I found a book about amateur telescope making from our local library.

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