11am - 11pm EST 
Monday - Friday

1pm-11pm Sat



919 553-3980



919 553-3980



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

200 Short Johnson Road
Clayton, NC 
USA  27520


Place Online Order

     (opens in new window)



Home Page

About Siebert Optics

Contact Information







Telescopes for sale



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


BT70 RA88 / Miyauchi / Kowa eyepieces


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


Binoviewer Alignment and Supercharge Services


Adapters - Meade Scopes and ETX


Binoculars - Quality Modified


Large and Small Non Illuminated and Illuminated Cross haired eyepieces.


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


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




Observers Hood - light blocking 


Planetary Fleece Blanket 


PST Accessories


Telecentric Barlow Lenses


Zero Magnification Adapter





Ladies Corner

Saturn Earrings  

Astronomy Themed  Fleece Blanket 

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









About Siebert Optics

Hi, my name is Harry Siebert, and  I have been an amateur astronomer for many years.   Like many, I cannot afford to spend a fortune on telescope accessories.  So through much study, research and experimentation, I have designed affordable telescope accessories for myself and others.  Siebert Optics strives to give the best quality at the most affordable prices for any astronomer, whether a newbie or advanced in the hobby.  Please feel free to ask any questions you may have either via email or phone at the above number.  Siebert Optics is a small company so feel free to ask for me specifically.


This Photo taken with a PST and a Black night binoviewer using a 19mm Ultra. Camera hand held. 


Below taken with the 10" Dob, 1.5x Siebert Barlow and a SiebertOptics eyepiece.

The big red spot in Jupiter photographs can be seen just off the center to the left on the darkest red band.


Photo below taken with ETX 90RA, 1.5x Siebert Barlow, And SiebertOptics eyepiece.

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!.

available in any dollar amount you wish to purchase.

I accept PayPal, the #1 payment service in online auctions!

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



Babelfish.jpg (12943 bytes)



Free counters provided by Honesty.com.