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919 553-3980  Primary
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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

Contact Information







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


(Specialized Binoviewer services you can't get anywhere else)


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











Services hard o find any where else.


Full Denkmeier service page. Repair services include all OCS and Power Switch repairs.

Binoviewer OCA's for all binoviewers>>  http://www.siebertoptics.com/SiebertOptics-OCA.html

(Double Self Centering Diopters for BW, Denk and Baader $199) Take a Look Here

Self Centering eyepiece holders for Burgess/Orion/other binoviewers Pair $49.

Collimation/cleaning services for binoviewers: TV, Baader ,$149-- Denk, BW and most other brands .

Professional Collimation/cleaning services for standard binoculars. $75 Advanced binoculars $100

Brass eyepieces And Barlows options for Brass telescopes. (See All ads)



















This is a simple ad and lets you know that repair services are available for all

Denkmeier Binoviewers, OCS and Power Switches.

Just contact me with the info at the top left of this page and we will talk about what is needed to bring your binoviewer or other accessories to full function.

If you need more then one thing serviced we will work out a cost effective service to get thing working. Ex: If you combine a repair of your binoviewer with another service the binoviewer collimation is only $99


My name is Harry Siebert -919 553 3980









































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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