Stargazing Building a telescope ( from another one )

AI Thread Summary
The guide from Apogee Inc. is deemed acceptable for building a telescope, but it may not provide accurate measurements for all components. Specifically, the guide uses a different focal length (f10) compared to the user's f4, 4.5" mirror, which has a focal length of 500 mm. As a result, the telescope tube should be approximately half a meter long, rather than following the guide's dimensions. Users are advised to adjust the plans accordingly to ensure proper alignment and functionality. Following these adjustments will help successfully complete the telescope build.
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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