Thread: [SOLD] Mirror Blanks, 20 Inch and 24 Inch
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Old 22-06-2009, 10:03 AM
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Brettstar6754
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Join Date: Jun 2007
Location: Bluemountains
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Mirror Blanks, 20 Inch and 24 Inch
For sale, 24 inch or 603mm dia, 40mm thickness glass blank. Was used as a optical flat in an industrial machine.The back has a small notch near the edge. This means a nice bevel of 20mm will be required to remove the notch for perfection. It has been ground to a radius for a dobsonian telescope. F/D= 4.5 Go figure.
$800

For sale 20 inch or 490mm Dia, 40mm thickness Pyrex blank. was a great mirror for years until i chipped the front face with 3 conchoidal chips. they are no deeper than 4mm so the blank can be easily re ground. Or the back could be ground as its in good order.
$600

Swap for quality 100mm refractor?
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Last edited by Brettstar6754; 22-06-2009 at 03:36 PM.