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ABSTRACT.I describe a simple new method for collimating a Cassegrain telescope that gives near-perfect correction over a wide field of view. This method was used to collimate the 6.5 m MMT in 2002 ...

Which refractor telescope is best? Space has intrigued humankind ever since we looked skyward for the first time. While it is difficult to imagine what our ancestors thought of the twinkling lights, ...