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| RE: RE: ??How Thick Should I Go??
Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To Posted by X might mark the spot but... on May 6, 2000 16:15:15 UTC |
it is no guarantee you will not have astigmatism. You forgot to mention that the "X" should disappear evenly, the fact that it dissapears means nothing as per ATM Vol 1-3. Also it is no guarantee that when you place the mirror into its mounting cell that it won`t have astigmatism. The blanks you mention certainly are not in the same category of "thin" as the inquirer`s 10" x 3/4"T.I know some folks have made thinner ratio mirrors using 27-36 point flotation but even then they also had twice or more thickness to transmute local loads from mounting points. I an not inclined to recommend this thin a mirror for a first project. Instead shop the Astromart or Ebay for a good blank if you can wait or shop for one from the commercial vendors. Newport by far is not the least expensive but may have just what you want.
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