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Serving Large Observatories and the Amateur Astronomy Community alike.

200 Short Johnson Road
Clayton, NC 
USA  27520

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         Products:

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 $449-$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 $49 Call or Email for details.

Camera Focus Adaptors

Camera Adapters - Universal

H-Alpha Focus Accessories

Converters

Special binoviewer services and products you cant get anywhere else 

ICP's Image Correction Prisms for Newts

Diagonals

Extension Tubes

Large refractor modular OTA's

Eyepiece Comparisons

Focal Length Reducers

Miscellaneous

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

      Fabrics

      Purses

Welcome to the New T-2 Modular and Modular Telecentric Zoom Barlow page. For T-2 modular Click here.

Why Modular and a Zoom? That is because you can go much further combining the two concepts. 

Model#AZ  (x4x8) $399

No longer available ---Model#BZ  (x3x6)--- $399  No longer available

The Barlow below offer the best combination of convenience, Performance and ease of use possible. And simply have features that you will not find else where. 

   T-2  Modular 2" Barlow . These versatile Barlows can connect to a T-2 thread. They have Photographic application as well as visual. The magnification element can detach from the top eyepiece holder and then re-attach to female T2 accessories. (or bottom of the filter wheel) This can be used with a filter wheel that is T2 compatible. You can also attach a camera to it or you can put the Barlow together and use the supplied T2 top that fits in the 2" eyepiece holder to attach a camera to it for the stated magnification. The top eyepiece holder has a T2 female attachment to connect the top of a filter wheel if you want.

Ask and I will give you a full rundown of what this Barlow can do. Please read the information in the picture and under the picture.

The choice of magnifications are:

  2.0x  $329 #(T2M2.0x)

  2.5x  $329 #(T2M2.5x)

   3.0x  $329 #(T2M3.0x)

Instructions in picture and Text below.

Align the flat spot on Delrin ring to avoid center shaft going through wheel. With the Delrin spacer in place rotating operation of wheel will not be impaired. Do not over tighten the element piece to the bottom of the Filter Wheel.

Here below is an example of a T-2 filter wheel.