instrument coasting only a small fraction of its worth ,plus the fun of having made it .
The telescopes made by amateurs are usually of the reflecting type.
with a concave mirror instead of a lens for gathering light.Telescope-making kits,
including a roughly finished galss "blank" for the mirror.avaible from
some optical-supply firms.The final testing and finishing of the mirror require
special skill the help of someone with experince
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