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New Tetra Telescope

Featured in Sky & Telescope (July 1999), this 4-mirror design by John Francis achieves forward compactness in a Tetraschief by making use of the declination axis to fold the light path.

[New Tetra Telescope]

Internal view of the optics.
John's "newtryad" is one of the sample designs bundled with Winspot.

Author: David Stevick
[Weird Telescopes Page]

Curator: Hartmut Frommert [contact]
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