A cheap DIY telescope came together from PVC, a copier lens, and hardware-store parts, but the real test never happened.
You’ve got a laser cutter. You’ve got a 3D printer. What do you make? [Ayushmaan45] suggests a telescope. The modest instrument isn’t going to do serious astronomy with only 8X worth of optics, but it ...
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He recycled broken glass to build a telescope

He tried to make a working telescope from scratch, but clear glass kept failing and the first lenses came out flawed. Using recycled glass, a rebuilt kiln, and hand-ground optics, he pushed through ...