Mirror Blank 8 inch - Grind an 8.4\" Telescope Mirror - 8.4 inch actual Diameter For Sale
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Mirror Blank 8 inch - Grind an 8.4\" Telescope Mirror - 8.4 inch actual Diameter:
$52.00
Grind your own telescope mirror with this 8.4 inch diameter, 3/4\" thick telescope mirror blank. An 8.4 inch telescope mirror collects over 10% more light than an 8 inch mirror!
The blank is flat on both sides, ready for you to grind a high precision telescope mirror. With care and guidance from multiple information sources on the internet and in books, you can make a much better quality mirror yourself than you could ever buy commercially, or in a commercial telescope like Celestron or Mead. Try it!
This mirror blank is made of annealed plate glass and has been tested to be free of internal stress with polarized light, as shown in the above photo of a test being conducted on a six inch blank. A plastic protractor was inserted into the test to illustrate what a stressed substance looks like under polarized light. As you can see the mirror blank shows no stress - all the blanks we sell test out like this, or they don\'t ship
Note.. image shown is of an 8 inch blank - your blank will be identical except it will be 8.4 inches in diameter! Your blank will be the same width as the blank pictured - 3/4 inch
Please allow 10 days for delivery - we hand make these blanks, so it can take a little while - if the blank you order is in stock, it will ship the next day.