Printable Camera Lens Helicoid M42 10mm Focus Travel
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A 3D-printable M42 helicoid focusing adapter for DIY lenses and macro photography. Uses M3 grub screws and M3 stop screw
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Updated at source:
Model information
- Source
- Printables
- Category
- Photo & Video
- License
- Creative Commons — Attribution — Noncommercial
This helicoid adapter provides 10 mm of precision focus travel, compatible with the popular M42×1 front/back interface used by many vintage lenses and camera adapters. Intended for adapting projector lenses, odd optics, and other fun DIY photography experiments.
Smooth M48×3 focusing threads (silicon grease recommended)
Inner barrel anti-rotation slot (needs 12mm M3 stop screws)
Focus ring axle capture using 6mm M3 grub screws ( thin layer of silicon grease in slot recommended)
No supports needed for threaded parts
Fully test-printed and verified working
Great for macro photography + custom optic builds
Hardware required:
Part | Qty | Size | Purpose |
|---|---|---|---|
Grub screws | 2 | M3 × 6 mm | Keep focus ring centered in groove |
Stop screws | 2 | M3 × 12 mm | Engage slot to prevent barrel rotation |
Silicone Grease | Optional for focus ring thread lubrication |
The grub screws should NOT be fully tightened
adjust them just enough so the focus ring rotates freely but cannot slide.