Wednesday, February 21, 2018

Primaries and Secondaries for David's 17.5" Truss Telescope . . .

An all aluminium 6-point cell is affixed to David's beautiful 17.5" mirror.
This, and all my mirror cells, are designed and optimized with Plop.

A beautiful 3.1" secondary on its holder. It'll be painted black
to minimize unwanted light reflections.

The "observatory grade" 3-vane spider and focuser bracket is
in place and near completion for David's 17.5" telescope.

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