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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









26mm wide field

This is a .93" 26mm fully coated eyepiece. It has a near 50 deg fov and 22 mm. eye relief.

This eyepiece is $69. (EP94-26)   


Provides 19x with your scope.




Does your 15mm that came with your Tal 65mm lack eye relief and true FOV. Well here is the solution.


Shown with provided rubber eyeguard.

26mm wide field with extension tubes for Tal barlow.

This is a .93" 26mm fully coated eyepieceas seen above . It has a near 50 deg fov and 22 mm. eye relief and.......

This extension tube set allows you to take advantage of the Tal-65 Alkor barlow when using your 26mm.

This eyepiece and tube set is $138. (EP94-26ext)

Tube set alone $79 (EP94-ext)

Click on the picture above to enlarge 

Does your 15mm that came with your Tal 65mm lack eye relief and true FOV. Well here is the solution.

This is an amazing enhancement for the Tal-65. Here are the magnifications you will get with your  26mm and tube set.

26mm alone    = 19x  Lowest practical mag.

26mm with Tal barlow  = 67x

26mm with Tal provided barlow and tube = 91x

26mm with barlow and Siebert provided Tube #1 =113x

26mm with barlow and Siebert provided tube #2 added= 133x Highest practical mag

(((Combine the two tubes for the highest 133x )))

This eyepiece / tube set package will provide you with all the useful magnifications you might need including 19x and 133x which is your lowest and highest practical magnification. Also it gives you the ER you need to enjoy the scope with or without eyeglasses and you don't sacrifice a decent Apparent field to do it. 



































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!.

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