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1.25 Inch Metal Rack Focuser Refraction Astronomy Telescope Type For Eyepiece For Professional Monocular Astronomic Telescopes - Telescope - AliExpress
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Internal Threaded 2.7" Focuser with Feather Touch Micro 9:1 Dual-Speed Knobs (I27FOC3E-FT) - Astro-Physics
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Feather Touch® 2.5" Diameter - Dual Speed Telescope Focuser 3.5" Draw tube travel, and Brake. - Lunt Solar Systems
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Non-rotating helical focuser with collet for Hadley telescopes by ballanux | Download free STL model | Printables.com
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