Building a telescope ( from another one )

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SUMMARY

The discussion centers on building a telescope using the guide from Apogee Inc. While the guide is deemed acceptable, it is not suitable for direct measurements due to discrepancies in focal lengths. The user’s mirror is an f4, 4.5" with a focal length of 500 mm, whereas the guide references a f10 mirror with a focal length of 1140 mm. Consequently, the telescope tube should be approximately half a meter long to accommodate the user's mirror specifications.

PREREQUISITES
  • Understanding of telescope optics, specifically focal lengths and mirror types.
  • Familiarity with telescope construction techniques.
  • Basic knowledge of materials used in telescope building.
  • Ability to interpret technical guides and diagrams.
NEXT STEPS
  • Research the differences between f4 and f10 mirrors in telescope design.
  • Learn about telescope tube construction methods and materials.
  • Explore additional resources for telescope building, such as forums and instructional videos.
  • Investigate the implications of focal length on telescope performance and usability.
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Astronomy enthusiasts, hobbyists interested in telescope construction, and individuals seeking to understand the intricacies of telescope optics and design.

vincentm
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Hello,

I'm looking to build my first telescope from http://www.apogeeinc.com/product.asp?itemid=766 (PDF file). My question is this, is this a suitable guide in doing so? If not what steps should i take to successfully complete this task?
 
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I like it. It's consistent with advice from reputable sources.
 
vincentm said:
Hello,

I'm looking to build my first telescope from http://www.apogeeinc.com/product.asp?itemid=766 (PDF file). My question is this, is this a suitable guide in doing so? If not what steps should i take to successfully complete this task?

It's OK as a guide but you won't be able to use any of plans directly for measurements of length. Your mirror is an f4, 4.5" 500 mm fl. The guide uses one of the same diameter but with a focal length of 1140 mm (f10 mirror).

The tube you should build for this mirror from the Bushnell scope will only be around half a meter long.
 
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