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RE: Repair Parts Needed

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Posted by Robert May on May 22, 2000 17:37:07 UTC

Sorry to hear you damaged your scope.
As Kip says, you can get a new lens (which may or may not fit in the lensholder) from places like Astromart or one of the links from there but the probability is that the focal length will be different from what the Sears lens was. Given a choice, you would do best to get a lens that is slightly shorter as you can always shorten a tube but not make it longer. You had a 60mm F15 (900/60=15) objective and you may want to go down to about F12 (or even lower) for a better view of the sky.
The problem is that the lenses are made to all kinds of different curves on the glass and the glass itself can be any of over a thousand different types of glass (just like different steels for different puroposes) so all kinds of things will be different.
It would be better that you let go of the tube (you may want to save the focuser part if you ever want to build a telescope and the opening is at least 1/25" in diameter) and save the tripod if it has an equatorial (tracks the sky) head on it for another telescope that you may build.
There`s a lot of reflecting type telescopes that are a lot more powerful than that little scope and will give wonderful views of the sky.

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