$60 Newtonian Telescope 4.5inch 114mm

thingiverse

My innovative telescope design, featuring a 4.5-inch 114mm mirror showcased here with a 900mm focal length. Extremely easy to construct and engineered with numerous adjustments that ensure precision, minimizing any potential errors. Utilizes minimal filament and relies on readily available fasteners. Includes an integral arca Swiss plate for mounting on a tripod or peak design capture clip. # Parts list * Approximately 300 grams of filament * Mirrors [available on eBay](https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=114mm+900mm) * 3-6x 3/8-inch threaded rods, 36 inches in length [found at Home Depot](https://www.homedepot.com/p/Everbilt-3-8-in-x-36-in-Zinc-Threaded-Rod-802237/204273970) * 18-36x 3/8-inch nuts [available at Home Depot](https://www.homedepot.com/p/Everbilt-3-8-in-16-Zinc-Plated-Hex-Nut-25-Pack-802364/204274093) * 4x 1/4-inch nuts and matching bolts, 3/4 inch in length for view piece attachment [bolts available at Home Depot](https://www.homedepot.com/p/1-4-in-20-x-3-4-in-Nylon-Hex-Bolt-2-Pack-808378/204273639), [nuts available at Home Depot](https://www.homedepot.com/p/1-4-in-20-Zinc-Plated-Hex-Nut-25-Pack-802344/204274091) * 3x 1/4-inch bolts for objective mirror adjusters * Focusing mechanism [available on Amazon](https://www.amazon.com/gp/product/B01HG3RYR0) * Paper for baffles if desired # Adjusting The design incorporates a M42 threaded plate for a focusing mechanism. Alternatively, you can dispense with this by attaching your optics directly to the side of the telescope and focusing by adjusting the front nuts to move the secondary mirror back and forth. I've also included a small split socket (nutdriver.stl) to simplify adjustments as you build the telescope.