Adjustable Solar Projection Finder – Precision Sun Seeker
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Precision solar finder with threaded inserts for easy screw-adjustment and perfect telescope alignment.
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Model information
- Source
- Printables
- Category
- Physics & Astronomy
- License
- Creative Commons — Attribution — Noncommercial
This Solar Finder offers a completely safe and easy way to align your telescope with the sun. Using the pinhole projection principle, the sunlight is projected as a sharp point onto the rear target plate with a built-in crosshair.
Design Features:
Adjustable Housing: The finder mount is designed to accommodate threaded inserts. This allows you to use adjustment screws to align the inner cylinder perfectly parallel to your telescope's optical axis.
Safety First: Since you never look directly through the finder, this is the safest method for solar astronomy.
High Contrast: The target plate is positioned to ensure the projected sun spot remains clearly visible on the crosshair even in bright ambient light.
Recommended Print Settings
Since this part will be exposed to direct sunlight and heat, I recommend the following settings:
Parameter | Recommendation | Reason |
Material | ASA or PETG | Important: Avoid PLA, as it will warp in the sun. ASA is preferred for its UV stability. |
Infill | 30% - 40% | Provides the necessary rigidity for the adjustment arms and thermal stability. |
Walls | min. 3 Wall Loops | Increases strength, especially where the threaded inserts are installed. |
Layer Height | 0.20 mm | A good balance between print speed and functional precision. |