We are a full service custom Newtonian telescope mirror maker. Every mirror is made to order. We have full glass machining and melt capability, so custom sizes are available. We make any diameter, thickness, and F/ratio down to F/4 in our size range from 7” through 25” diameter. We can also consider special sizes or focal ratios in certain cases.

Prices listed are now for Schott Supremax premium borosilicate glass in all sizes except 8" diameter, which is still Pyrex. Prices listed includes coating and packaging. Shipping done at cost.

8" F/4.5 and longer. (Pyrex) . . . . . . . . . . $990.00

10" F/4.5 and longer. . . . . . . . . . . . . . . $1,400.00

11" F/4.5 and longer . . . . . . . . . . . . . . .$1,550.00

12.5" F/4.5 and longer . . . . . . . . . . . . . $1,960.00

14.5" F/4.5 and longer. . . . . . . . . . . . . .$2,620.00

15" F/4.5 and longer. . . . . . . . . . . . . . . $2,800.00

16" F/4.5 and longer . . . . . . . . . . . . . . $3,270.00

18" F/4.5 and longer. . . . . . . . . . . . . . . $3,930.00

20" F/4.5 and longer. . . . . . . . . . . . . . . $4,900.00

22" F/4.5 and longer. . . . . . . . . . . . . . . $6,900.00

24" F/4.5 and longer. . . . . . . . . . . . . . . $9,400.00

25" also available, contact us for quotation

F/4 mirrors add 20% to prices listed above

Pricing is for typical thickness ranges as follows (other thicknesses may be available in certain circumstances):

8". . . . . . . . . . 23 through 32 mm edge thickness

10". . . . . . . . . 28 through 35 mm edge thickness

11" . . . . . . . . . 28 through 35 mm edge thickness

12.5" . . . . . . . 32 through 35 mm edge thickness

14.5" . . . . . . . 36 mm edge thickness approx

15". . . . . . . . . 36 through 38 mm edge thickness

16". . . . . . . . . 36 through 38 mm edge thickness

18". . . . . . . . . 38 through 41 mm edge thickness

20". . . . . . . . . 40 through 43 mm edge thickness

22". . . . . . . . . 42 through 46 mm edge thickness

24" . . . . . . . . . 45 mm edge thickness approx

Photo is a bench image of a 10" F/5 Zambuto mirror.

Orion nebula courtesy of Del Johnson taken with a 12.5" Zambuto mirror.

A note on our F/4 pricing-

Over the last several years as we opened our market to F/4 focal ratio we found our labor to meet our entire suite of standards and tolerances to be very high. We refuse to compromise our standards, and so we found the amount of time we have been spending on these mirrors is not equal to the small additional cost we were charging, which was typically 10%. Based on our experience to date, we believe that a 20% additional charge over our F/4.5 price will be more appropriate for what we put into each mirror at F/4.

A 50% deposit places an order and begins the lead time. When the mirror is completed and goes out for coating, the balance is due. Contact us for more details and payment options.

A note for our international customers- We ship at the lowest possible rates, at actual cost to us. We use the US Postal Service for international shipment. Mirrors up through 16" and 18" (depending on destination) are shipped using Priority Mail International, which is less than half the cost of UPS Worldship. The size limit for this service depends on destination, as width and girth limits vary by country. Larger sizes are shipped Global Express Guaranteed which is still less cost than UPS. But in every case, Zambuto Optical buys the insurance for you. There are no added insurance fees to ship internationally, only the lowest possible rate to get you your mirror.

Current lead time is approximately 6 months, depending on size, glass availability, and our schedule of same-size mirrors.