A simple refractor homemade telescope

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    Homemade Telescope
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Discussion Overview

The discussion revolves around the feasibility and methods of constructing homemade telescopes, particularly focusing on using unconventional materials such as soda bottle lenses and existing telescope kits. Participants share their experiences, resources, and suggestions for building telescopes, addressing both theoretical and practical aspects of telescope making.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • Peter inquires about the possibility of making a telescope lens from a bottle bottom, referencing Bernard Schmidt's work.
  • One participant confirms the feasibility of building a telescope using two lenses and clamps, sharing their own experience from a physics class.
  • Another participant suggests that there are many high-quality telescope-building books available, emphasizing the value of learning from past mistakes.
  • Some participants express skepticism about the quality of soda bottle lens telescopes and propose alternative inexpensive construction methods, such as using copier lenses.
  • Chris requests advice on a telescope kit they received, detailing the components and asking for guidance on assembling a working telescope from the parts.
  • A participant advises that the glass lens blanks can be ground down, suggesting that sending them to a shop is an option, while also mentioning the potential for finding working telescopes at yard sales or flea markets.
  • Another participant notes the broken link to the original resource for making a bottle bottom lens and provides an updated link to the new page.

Areas of Agreement / Disagreement

Participants express a range of opinions on the effectiveness of using unconventional materials for telescope construction, with some supporting the idea while others caution against it. There is no consensus on the best approach to building a telescope from the provided components, as Chris's inquiry remains unresolved.

Contextual Notes

There are limitations regarding the assumptions about the quality and usability of the materials mentioned, as well as the specific designs of telescopes that can be constructed from the discussed components. The discussion also reflects varying levels of experience among participants, which may influence their perspectives.

Who May Find This Useful

This discussion may be useful for hobbyists interested in amateur astronomy, educators looking for practical projects, and individuals exploring DIY telescope construction methods.

Peter
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Hi:

I was looking for ideas for a homemade telescope for my son and saw this site,

http://www.geocities.com/telescope1999/14-5inch.html

Paging down some I saw that he made a telescope lens from the bottom of a bottle.

It this possible? Did Bernard Schmidt really make such a telescope? I think my son might try a telescope making project.

---Peter
 
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In physics 2 I made a telescope out of two lenses, a ruler, and some 'C' clamps. It is certainly possible.

Welcome to the forums!
 
There are also many high-quality telescope-building books available. Many of them are from the 80s when you hadn't as many commercial options as we do today, but there are some good recent releases that are valuable as well. You might want to pick that up to avoid making the mistakes of a neophyte.

Good luck with your project should you go forward!
 
Yes, I've heard of these soda bottle lens telescopes. Don't count on it being too good. Below are some other ideas for inexpensive telescope construction.

Here is a sight that gives some information on building inexpensive refractors.

http://es.rice.edu/ES/humsoc/Galileo/Student_Work/Astronomy95/telescope_design.html

Also, consider a copyscope, which is a telescope made with a copier lens. These are good rich-field type scopes for looking at star patterns. The copier lenses can be had for about $6.00 through surplus stores.

http://www.dma.org/~wagner/copyscop.htm
 
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Info request

I found this thread on Google while searching for info on building homemade telescopes. I hope someone here can offer some advice.

I've always wanted a nice, big telescope for casual use in my backyard, but have always been daunted by the prices involved. I recently received from an older lady of my acquaintance a 'telescope kit' that her late husband purchased many years ago. This was given to me with the understanding that some elements were probably lost long ago.

Here is what I have. I don't have calipers or micrometer handy, so these measurements are approximate:

Two unground glass lens blanks, 8" in diameter. One is unpolished, 1 3/8" thickness. The second is clear (polished?) 3/4" thick with what appears to be a green tint, with one edge beveled.

A small manila envelope "PARTS FOR MIRROR KIT S.N. 70005 LENSES FOR 1" UNMOUNTED EYEPIECE - MAGNIFIER - MAY HAVE SOME CHIPS, DIAGONAL MIRROR" contains a ground, polished lens 2" square, approx. 5/8" at thickest point. (one corner has a small chip) One small mirror, 1 1/2" x 1 3/8"

Does anyone have an idea as to what I do and don't have here? What type of telescope was this 'kit' designed to create? How do I turn these parts into a working telescope (and is it worth doing it?)


Thanks for any advice,

Chris
 
you have a BLANK
it can be ground a slow long process
or the blank can be sent off to a shop to finish it

btw my wife tryed this as a kid
a wound up sending the part done blank off to be finished
we have a descent working 8'' mirror scope as a result

but yard sales and or flea markets will get you a good scope QUICKER
but you have to hunt
and reject a few 100 60mm refactors for every reflector you find
but a few are out there

also cheap/broken binock's will give a working eyepiece as will microscopes
 
I wanted to try making a homemade telescope refractor lens from a bottle bottom, but the link at the start of this thread is not active.

I did a search and the new page moved to here:

http://sites.google.com/site/telescope1999/"
 
Last edited by a moderator:

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