The magic behind telescope MIRRORS.

No matter the technique, the end result is a mirror that, when placed in a finely crafted telescope, is sure to earn "oohs" and "ahs" from anyone who peers through the eyepiece - especially the proud owner. Making a telescope mirror To start, a new mirror blank is "sanded" down to create a precise parabolic curve in a process called grinding. Carl Zambuto of Zambuto Optical credits a local amateur telescope maker, Earl Watts, with convincing him to make his first mirror, a 6-inch. [Extracted from the article]