Making Optics of Houghton-Newtonian Telescope
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Rough grinding R3 on R1.
Trepanned lenses need core bevels.
Edging the lenses.
Trepanned cores have to be glued back.
Polishing R3.
Polishing R1.
My simple wedge tester. Final edge thickness should be 0.025 mm.
The lenses taped together.
It's transparent!
The lenses installed in the mild steel cell.
A ronchi photo of the spherical primary.
Optics ready after 5 months.
A front view of the telescope.
A sample astro photo of the Moon.
A nature photo through HN telescope.
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