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The "Deep Space Scope" Design

Home | Astronomy | DS-3 | NEWT design

The program NEWTWIN, by Dale A. Keller, was used in the design of DS-3.  This program was mainly used to determine the size of the secondary ring and the secondary mirror.  Sorry about the size of the pictures - I wanted to keep them original screen size, which makes them easy to read.

Initial setup specs were as follows:

Newt specs

Performance specs for DS-3:

Newt Performance

The NEWT main page shows as follows.  Notice that we are not vignetting the 75% ray, and that a 2.05" secondary mirror is "big enough".

Newt main page

A closer view of the focuser looks like this:

Newt Focuser