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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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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











Kowa Highlander eyepieces

The prices below are for each eyepiece.

4.5mm(Kowa45)$249 60deg  10mmER

5.0mm(Kowa50)$249  60deg 10mmER

5.5mm(Kowa55)$249  60deg 10mmER

6.0mm(Kowa60)$249   60deg 14mmER

6.5mm(Kowa65)$249  60deg 14mmER

7.0mm(Kowa70)$249   60deg   14mmER

8.0mm(Kowa80)$249 60deg  15mmER

9.0mm(Kowa90)$249 60deg  15mmER

10mm(Kowa10)$249 60deg  15mmER

14mm(Kowa14)$249 60deg  15mmER

15mm(Kowa15)$249 60deg  15mmER

18mm(Kowa18)$279 65deg  19mmER

19mm(Kowa19)$279 65deg  19mmER

20mm(Kowa20)$279 60deg  19mmER

24mm(Kowa24)$279 55deg  20mmER

26mm(Kowa26)$279 50deg  20mmER

28mm(Kowa26)$279 50deg  20mmER

14mm(Kowa14)$249 60deg  15mmER

15mm(Kowa15)$249 60deg  15mmER


.   We do complete alignment and Cleaning services for the Apogee / Miyauchi/ Kowa / BT and other Binoculars. Prices for cleaning and alignment starting at $99

      Click here.


Oring compression fit used simialar to Miyauchi


<<<Click Here

Focal length of your Binoculars below.

Kowa 32x82 F.I. 450mm F.L.























































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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