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Thank you for visiting Siebert Optics!
Serving Large Observatories and the Amateur Astronomy Community alike.

200 Short Johnson Road
Clayton, NC 
USA  27520


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About Siebert Optics

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Eyepieces .965" / 1.25" / 2.0" / 2.7" / 3.0" / 4.0" / 4.3"


Large and Small Binocular Cleaning and Alignment services $99 Call or Email for details.


BT70 RA88 / Miyauchi / Kowa eyepieces


Binoviewer Alignment and Supercharge Services


Advanced Barlow Lenses including: Modular and 4 element Telecentric magnification multipliers


1.25" and 2" Advanced Binoviewers From $649-$1999


 Binoviewer OCA's and Accessories


Adapters - Meade Scopes and ETX


Binoculars - Quality Modified


Large and Small Non Illuminated and Illuminated Cross haired eyepieces.






Camera Focus Adaptors


Camera Adapters - Universal


H-Alpha Focus Accessories



Special binoviewer services and products you cant get anywhere else 

ICP's Image Correction Prisms for Newts




Extension Tubes


Large refractor modular OTA's


Eyepiece Comparisons


Focal Length Reducers




Planetary Fleece Blanket 


PST Accessories


Telecentric Barlow Lenses


Zero Magnification Adapter





Ladies Corner

Saturn Earrings  

Astronomy themed totes/purses


Free Domain Pictures

Astronomy Accessory Links of 

       products not offered 

       by Siebert Optics


Useful Astronomy Links


International Dealers


Astro photos


Non-Astronomy Items











We do not furnish loaner eyepieces for Star parties. Though we do not put restocking fees on eyepieces returned after star parties we do reserve the right to charge a repair fee or refuse returns on eyepieces that have been damaged or show excessive wear and/or scratches. We will not charge restocking fees on returned undamaged items that are in resell condition within the return period. We also reserve the right to take between 3 to a maximum of 6 weeks to process returns on large item orders that exceed $1000. It is unlikely to take this much time to process, but sometimes it does. We are not obligated to accept returns on items returned after the warranty period. This also goes for closed out or request items and heavily discounted items. Also items not on the list of items we are actively taking orders for, these are considered "Closeout".  We "may" choose to issue in-store credits for these items at "our discretion. --We do reserve the right to deny returns on these things.  All .965 products are not refundable. All illuminated eyepieces are not refundable. The same goes for items ordered in brass. The reason is that certain products are sold far too infrequently to be restocked.  Binoviewer/Binocular eyepiece sets as well as other types of products such as Personal binoculars  that have been modified for you are considered a "special order" and like all "special order" items they are not refundable. Specialty items also not returnable. These items might be subject to in-store credits at "our discretion. All returned Items must have an RMA number in order to be processed. We can not be responsable for items lost in the mail if the customer does not pay for insurance and tracking. In fact we will not ship expensive items without DC and insurance.
















































All listed products come with a 30-day money-back guarantee* unless otherwise stated.

Specialty order items are not refundable (items made specifically for you).

We welcome
International orders!.

We accept Visa, Mastercard,


  American Express. U.S. Money Orders, and Personal Checks (held 10 working days for clearing)Online payments may be made securely through



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