Then he carried out the detailed calculations that showed how to build them - the requirements for telescope design, mirror coatings, and instrument performance.

But the "100 inch," as astronomers affectionately call it, has also become a symbol of a remarkable renaissance in the art of telescope design.

This occurred thirty years after Galileo's first telescope design, and Zupi's was only slightly more powerful.

The company sold many 0.5-meter to 1.0-meter telescopes to colleges, institutions, and individuals continually improving upon the original telescope design.

Other telescope designs are used such as Schmidt and Maksutov optical assemblies.

In particular, the "correction plate" was like nothing ever seen before in telescope design.

This combination is a difficult achievement in a single telescope design.

Most telescope designs produce an inverted image at the focal plane; these are referred to as inverting telescopes.

It is very important in telescope design.

Higher order aberrations in telescope design can be mostly neglected.