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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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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


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1.25" and 2" Advanced Binoviewers From $649-$1999


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The  Black Knight Echelon series

The 35mm model  has been discontinued in favor of the 40mm VP

Details on the new format VP Echelon Click here.

Echelon Pricelist and accessories Click here.


 35mm and new VP 40mm CA. With T- 2 or standard 2" You CAN get the T- 2 and a thread on 2" base optionally. The units have 1.25" eyepieces holders. They are only ones of their kind and part of the Echelon series of binoviewers.

Its hard to beat a Black Knight .

Nicely Machined and Anodized. 

Mirror based 

10th Wave dielectric optics


    35mm and new 40mm Clear Apertures are by far the biggest Binoviewers  in the 1.25" format. Also very light at 1.2 lbs Making them the lightest 1.25" bino with few exceptions.

Nothing comes close ( Except the Elite 2" series.) (Click Here)


35mm and 40mm diagonal Modification.  

<Click Picture

This mode is an extra $150 and makes the Echelon and Elite binoviewers interchangeable with a 2" diagonal eyepiece holders. It comes with a  2" nose piece that threads in place for normal use in a dob or unmodified diagonal.



 Eye spacing from 45mm-83mm gives it the greatest Interpupilary range of any binoviewer on the market. 

Click on pictures to enlarge


You WILL get much better total illumination with a 35mm or 40mm CA.  To compare to other Units.  (Click Here) And the New VP 40mm. Specs on the 40mm are better yet at the bottom of this page.




Specifications at a Glance:


1.25' 35mm

Optical Path:  5.8"

Weight:  1.2 lbs

IPD:  55mm-82mm's

Beamsplitter:  cube dielectric

Mirrors:  1/10th ~ dielectric 99% reflectivity

Optical Windows:  99% transmission

Eyepiece holders:  self-centering (optional diopter(s) extra)



Pricing Below

 The use of first surface diagonal mirrors will eliminate almost any possibility of reflections that prisms can create and also eliminate chromatic aberrations. These units have custom made optics and have the spec's to outperform any bino in planetary and deepsky use. Try a set of my 1.25" Ultra Plus 24mm SWA eyepiece's for the ultimate 1.25" DS view. Low mag correctors in the 1.3x, 1.5x and 1.8x range are available. 


Large format  1.25" binoviewers pricing:



Here at the bottom are the details for the New VP Echelon binoviewer..

  This is the 40mm VP Echelon.  

 The VP vs Televue nosepieces removed.

     It will "transform" the way you look at the Heavens.     

         And now a model that takes 2" eyepieces.                                    

   Siebert VP binoviewers are for those who want more aperture then is presently available on the market elsewhere. 

The VP will come in either Prisms or optional  mirrors . Both will be based on a 40mm beam splitter with a lower Clear Aperture of 40mm and 33mm+ CA at the top. You can get it in a T- 2 base or standard 2" mount or optionally both. Optical path in the prism based units are 150mm giving it by far the best "CA vs OP" ratio of any binoviewer on the market. 

The closest being AP Baader 28mm CA and 114mm OP.  This means in an SCT with the VP you will get 100% illumination out to a 27mm field stop  vs.  Baader's 16mm full Illumination at the field stop.

 The 40mm beam splitter and prisms are dielectric 99%, as are the optional mirrors. The units will have Self Centering Diopters standard on both sides. The 40mm CA at the bottom will make it necessary to have either a T- 2 or 2"  It is lighter in weight then most 1.25" binoviewer on the market. 

The best thing is its price. With the 40mm VP Starting at $1199 you are in the lower premium binoviewer price range. The Baader compared above although not matching it's CA/OP specs is over $1600 new.  So this makes the Siebert 40mm VP unique. 

The biggest CA, the shortest Optical path and in the lightest most compact package possible.

 Did I mention the finest optics and building materials.

. A lot of cosmetic touches have been added to these to give them a beauty all their own. The T- 6 Aluminum and black Delrin composites are very tastefully done to make these binoviewers an attractive novelty.

  Info on Self Centering Double Diopters Adjusters and how they work.












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Specialty order items are not refundable (items made specifically for you).

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