OpenAstroTracker 500mm lens Walimex Mount, Adapter, Focuser & Blend

thingiverse

This assembly included a modified mount used twice (front&back) for a 500mm Walimex lens. Assembly includes: - one mount that integrates a focuser assembly - focuser assembly driven by a small stepper motor 28BYJ-48 - Camera mount is for the RaspberryPi HD camera - huge blend that is a remix and screws into the filter adapter guides are 2mm hobby RC car axles and drive thread and nut are M6x70. Although I include the STL´s - please use the cad files to customize the diameter to fit your lens ( i.e. Samyang or other) - mine turned out a bit loose required a rubberband to create a super tight fit. I use the Ardufocuser firmware by jbrazio to control this + guidescope focuser in EKOS/KSTARS. https://github.com/jbrazio/ardufocus I had tried using a follower focus approach and found the mechanical resistance of the lens to require more power than I cared to invest in, this seemed a lighter weight solution. Credits: 2020_profile.scad from slurked 28byj48stepper.scad from Russ Hughes - has a small inaccuracy around blue plastic bit parametric_involute_gear_v5.0.scad from GregFrost - to design gears (not easy) threadlib_solid.scad from Johnny Cernato fillet.scad can´t find the source ISOThread.scad //by RevK @TheRealRevK libPiCam.scad //J.Beale remixed Blend: thingiverse.com/thing:4492847 by risomaster remixed Lens Base Brackets: https://www.thingiverse.com/thing:2992708 by barbelturique