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2 members, 23 messages, 3 photos added in the last 7 days
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  • Re: car mirror

    The inside rear view mirror is typically a wedge with the top edge being thicker than the bottom edge (or perhaps reversed). This allows the mirror to act as

    dancroskrey 7 hours ago
  • Re: crayford focusser

    Theoretically, Charles, a point contact will cause a great attraction force called the "VanDer Waal's Force". If the contact area is clean, the molecules lock

    pvalleli 9 hours ago
  • Re: hpwtp microscope

    Jacques, If you put a cover glass on a silvered glass slide, you will have a second surface mirror. In astronomy, it is NOT good for imaging. Good for a solar

    pvalleli 9 hours ago
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Group Description

This Group is for the FREE exchange of ideas related to Amateur Telescope Making (ATM).

Have fun, be kind, play fair, learn, teach, participate.

Here's a contributed photo of a homemade 22 inch tube (before painting) for an Astrograph built by Dave Tandy. The full size photo can be viewed by ATM_FREE members in the "Photos" section. Check out the ATM_FREE Group's discussion for more info on this project and other things we are doing.

Ken Hunter

Group Information

  • 1583
  • Telescopes
  • Jun 1, 2002
  • English

Group Settings

  • This is a public group.
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  • Listed in Yahoo Groups directory.
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  • All members can post messages.

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