SLR Lens eyepiece adapter (Pentax-PK)
thingiverse
https://youtu.be/pPMKM2yOqcY Transform Your Old PK Mount Lenses into a Mighty Telescope. Fits Eyepieces with a Diameter of 1.25 Inches (31.7 Millimeters). Calculate the Magnification by Dividing the Lens Focal Length by the Eyepiece's Size, Such as: A 200mm Lens Paired with a 4mm Eyepiece Yields x50 Magnification. Enjoy Your New Telescope! Print Settings Printer Brand: Printrbot Printer Model: Simple Black Raft Settings: Yes Support Settings: No Resolution: At Least 0.3 Millimeters Infill Percentage: 30% Notes: The Design Consists of 3 or 4 Shells. How I Created This Project I Measured a Lens Cap with Digital Calipers and Drafted a 2D Sketch in Inkscape Software. Next, I Extruded the 2D Design and Exported it to an STL File Using 123D Design.
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