Now you can have thin pre-curved (meniscus) mirror blanks from 10 to 30 inchs diameter. - It is available in fine lime glass and in BVC glass - It is provided from 19 mm (.75 inch) to 38 mm ( 1.5 inch) thickness - Take advantage of full thickness, no thin center section - Appreciate the fast cooling and low weight mirror blank
This is the lowest cost of the lightweight mirror blank that i produce. Amature telescope makers (ATM'ers) will appreciate the ability to build large size telescopes at much lower cost, and still lightweight, with the advantage of fast cooling. All the blamks are pre-curved. Take advantage of the meniscus form of the substrate. You will not experience a thinner center, much appriciated in fast optics.