Can i use a watch glass as a primary mirror of dobsonian telescope?

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SUMMARY

Using a watch glass as a primary mirror in a Dobsonian telescope is not feasible due to its inadequate surface curvature. The watch glass lacks the necessary optical precision to focus light effectively, as it is likely flat on the bottom. This discussion confirms that alternative materials designed for optical applications should be utilized instead of a watch glass.

PREREQUISITES
  • Understanding of optical principles related to telescopes
  • Familiarity with Dobsonian telescope design
  • Knowledge of mirror fabrication and curvature requirements
  • Experience with optical glass materials
NEXT STEPS
  • Research suitable materials for primary mirrors in telescopes
  • Learn about the optical requirements for telescope mirrors
  • Explore the design and construction of Dobsonian telescopes
  • Investigate alternative mirror types, such as parabolic mirrors
USEFUL FOR

Astronomy enthusiasts, telescope builders, and anyone interested in understanding the optical requirements for effective telescope performance.

josue2503
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can i use a watch glass as a primary mirror of dobsonian telescope?
 
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No, it would not have a surface even remotely correct enough to focus light. I doubt they're made to any specific curvature.

- Warren
 

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