Vixen GA-2 Illuminated Guiding Adapter – Complete 3D-Printed Accessory Set
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A complete set of 3D-printed accessories for the vintage Vixen GA-2 guiding adapter: dust caps for all openings, a 0.965
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- Physics & Astronomy
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- Creative Commons — Attribution — Share Alike
The Vixen GA-2 is a classic illuminated reticle guiding adapter from the 1980s. While the optics are still excellent, sourcing accessories and keeping it protected during storage can be a challenge. This set covers everything.
Included parts (5 pieces)
2× Barlow end cap (0.965″) — Dust protection for both ends of the integrated 3× Barlow lens when removed from the unit
2× Eyepiece barrel cap (0.965″) — Protect the 0.965″ barrel openings of the GA-2 body itself during storage and transport
1× Eyepiece adapter 0.965″ → 1.25″ — Use any modern standard 1.25″ eyepiece with the GA-2 instead of hunting for rare 0.965″ oculars
1× Battery cartridge (A14PX → 2× LR44) — Holds two standard LR44 / AG13 button cells in series (2× 1.5V = 3.0V), matching the original A14PX voltage exactly. This is the same solution Vixen adopted for the successor model GA-4. No soldering required — pure mechanical contact through the existing spring pressure. Use a spring to get contact between the bottom of the case and the battery with in the adapter (or or a piece of metal ...).
1× Adapter 0,965 inch to 1,25 inch — Let's you mount the part to an ordinary 1,25 inch focus adapter
1× Adapter 0,965 inch Celestron Pössl (26mm or other) — This has an 28,85 x 0.75 thread. You should be able to screw in any standard Meade, Celestron, ... Pössl oculars directly to the adapter (remove the standard 1,25 inch barel).
Printing notes
Print all parts in PETG or ABS for dimensional stability. Layer height 0.15 mm, 3–4 wall lines. Due to printer tolerances, test-fit caps before printing the full set — a first-layer compensation tweak may be needed depending on your printer.
Compatibility
Designed specifically for the Vixen GA-2. Caps and adapter may also fit other vintage Vixen accessories sharing the 0.965″ barrel format.
Custom threads
If you are familiar with Visual Studio Code, Python and/or Jupyther Notebook, you can use my "thread tool editor" which can alter the standard Fusion 360 thread tool (https://github.com/apos/fusion_360_threadtool_xml_editor). It is based on Paul Gerlach's initial idea. You should use KI to add threads with this editor. There is a special Readme for this purpose. Give it the github-repo URL and the location of your Fusion 360 and it will help you create custom Astro-Threads.