Current Price: $98000.00
Buy It Now Price: $98000.00
Bids: 0

1.5m (60") f/3.75 ZERODUR Research Grade Observatory Telescope Mirror

1.5m (60") f/3.75 ZERODUR Research Grade, Observatory Telescope Mirror We are pleased to be able to offer one very special, very large telescope mirror. This is your chance to buy and own a research class 1.5 meter (60 inch) F/3.75 ZERODUR mirror. This optic came out of the aerospace industry. It was figured and polished, then had a protective coating painted over it before being mothballed (mirror may either be parabolic or hyperbolic and will need to be tested since we're not sure of the telescope configuration this was made for). Considering the source (which we will share with the buyer once purchased), we suspect that it was a backup mirror used for high altitude astronomy but never flew since it is without coating. However, we cannot prove this. It is merely speculation. Being of substantial thickness, 8", and weighing in at roughly 2,000 lbs, a very heavy and rigid structure will be required to support its mass properly. That said, this opportunity is targeted to research institutes, universities and the most discriminating of amateur astronomers / clubs with the means to incorporate this optic into a research class observatory. Alternately, this would provide a lot of substrate material for an optics shop to core, slice and make flats from... A lot!

  • Diameter: 1.5 Meter / 60"
  • Thickness: 8" - Solid
  • Focal Ratio: f/3.75 ±
  • Substrate: Zerodur
  • Weight: 2000 lbs ±

***What we don't know: Not having received any paperwork for this optic we are unable to verify the grade of Zerodur, the accuracies of its figure or its exact focal length down to the mm. Should you need a an interferometric test report, we've located a facility in the Midwest able to handle a mirror of this size and weight who can preform the interferogram and provide paperwork. We will be happy to put you in touch with them. Alternately  we are happy to work with the buyer and send it to the lab of their choice on purchase.

Due to the size and weight of the item(s) it will have to be picked up locally or shipped freight. Feel free to arrange shipment through your preferred freight company, or we can arrange for the freight shipment.

Please take a look at all of the provided photos before placing your bid to thoroughly inspect the lot contents and condition.

Item Condition: Used

Return Policy: We are offering the buyer a 30 Day right of return for testing and inspection. Buyer will be responsible for the cost of return shipping.

Listed for Marc.A by Sean.S - Located at: Container-12

  • Shipping weight is 0.00lbs, 0.00oz, shipped from our warehouse in Compton, CA. (zip 90221)
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  • California residents will be charged 9.50% sales tax.
  • Tennessee residents will be charged 9.00% sales tax.
    (We have offices in both California and Tennessee and are required to charge tax to any shipment sent anywhere in either state.)
  • We accept the following methods of payment:
    • Paypal & Credit Card (VISA, Mastercard, AMEX, Discover)  

    • For foreign orders we accept PayPal. We reserve the right to refuse other payment types at our discretion. We make our decision on a case by case basis, due to previous problems with some foreign credit cards.
  • After your item has shipped, we will email you the tracking info.


    • We will not make false statements on Customs Documents. When you buy an item it will not be listed as a "gift". It will be valued at exactly the price you paid.

    • YOU must be aware that customs duties (Import Taxes) could be due when the shipment enters your country. YOU are responsible for those duties/taxes; know your own country's rates/policies before you buy.

    • Due to the various levels of service and care provided by the different postal services around the world, we cannot guarantee delivery outside the United States. Insurance is strongly suggested or may be required.

    • If the item is returned/rejected from your country for any reason, we are happy to refund the cost of the item only, less any eBay fees and shipping costs. If you still want the item, we are willing to try and re-ship; this will require you to pay the applicable shipping costs again.

    • Buying the item confirms that you have read, understand and agree to be bound by our terms for a foreign sale, and that these requirements are incorporated into the eBay sales terms.

    • Problems are questions that were not asked before the auction closed. If you have any questions, please ask them before the auction ends. It's often to late to solve them if you wait. Feel free to call us via the number below, or send a message to the provided email address.

    • Electro Mavin is a 9-5 Mon-Fri business. We will do out best to answer any questions as soon as we can. (if you contact us on the weekend or after hours you may not hear from us until the next business day)

    B#: R 213-008

    Filed under: Eyepieces & Accessories