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Is 19mm Too Thin?

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Posted by Greg Tedford on August 7, 2002 12:15:43 UTC

I have recieved a price of $230 for a 150mm x 25mm piece of glass but when you go down to 19mm x 150mm the price drops to only $115.

Is this too thin? What will happen if i make this mirror of this thichness?

I have never made a mirror but want to have a go at making everything for my first telescope but cannot afford to stuff up many mirror blanks at $230 each.

Can i use the thinner blank (19mm) if i support it in more places?

Any help appreciated.

Follow Ups:

19mm - bobmay - August 7, 2002 - 21:08 UTC
- Thanks Bob - gregted - August 8, 2002 - 22:45 UTC
  - thicknes - bobmay - August 9, 2002 - 18:59 UTC
- One more question? - gregted - August 8, 2002 - 23:18 UTC
  - eyepieces - bobmay - August 9, 2002 - 18:48 UTC
maybe to thick - stevec - August 14, 2002 - 02:41 UTC

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