SMRTR TechDec 14, 2025NotebookCheck

This inexpensive 3D-printed DIY telescope fits in a jacket pocket

SMRTR summary

Lucas Sifoni created a functional 3D-printed Dobsonian telescope that fits in a jacket pocket, built around a 76mm parabolic mirror with 300mm focal length using carbon-fiber PETG filament for structure. After refiguring the initially overcorrected mirror, the telescope achieves 0.9 Strehl performance, delivering genuine optical functionality despite its compact size.

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