Webcam Telescope Adaptor

thingiverse

I conceptualized this webcam adaptor after discovering that most existing designs were optimized for fitting into the eyepiece tube rather than over an eyepiece. I sought the ability to utilize eyepiece projection instead of prime focus. The webcam mounting plate is tailored specifically to fit my Logitech C210, but can easily be adapted for another camera. I designed it in two pieces so that they could be printed without support and replaced if anything broke. The eyepiece holder resulted from extensive trial and error with various eyepieces and issues with friction fit or wobble. In this design, rubber bands are stretched across openings that allow them to intrude under tension slightly into the eyepiece tube, enabling the adaptor to be easily attached or removed without disturbing the telescope position. I also recommend acquiring or creating a parfocal ring as shown in the last photograph. Once you achieve good focus with the camera and the eyepiece you plan to use, remove that eyepiece and the camera. Take one of your other wider-angle eyepieces and place it in the eyepiece holder with the parfocal ring loosely on it. Slide the eyepiece in and out until you get a good focus (don't change the focus knob). Once you have the good position, slide the parfocal ring to hold the eyepiece there, and tighten the knob or clamp. Now you can find your target easily with one eyepiece, and use the webcam and other eyepiece without needing to refocus!