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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

Announcing Body and Optical Supercharging for your Binoviewer.  Basic service $249 Make your already Good binoviewer into one of the best on the market. And that means like TV and Denk 2 models. Units that can be Supercharged: includes: Burgess, Celestron, Orion, Williams Optics, Stellarvue, Moon Fish, Baader, and any other "like" Binoviewer you can think of. See details below.  Check here to see if your binoviewer qualifies for this upgrade or see bottom of this ad.  http://tinyurl.com/cexsq9l

 

Diopter Video>>>Click here More here>>>1 - 2 - 3 <Right Click and choose (save link as) to download and save.

 

WO with SiebertOptics Self Centering Diopters

 

 

Yes this upgrade can make your binoviewer work on the order of a Binoviewer costing $900+ This conversion will widen the CA or "Clear Aperture" Micro Baffle your prisms instead of just stopping them down at the eyepiece holders as they do now. The prisms in your binoviewer are very big and can be made available for use by this Detailed upgrade.

Many of  the binoviewers listed above have very nice eyepiece holders and large Multi- Coated prisms. They have the shortest optical Path of any Quality binoviewer. The body is as well constructed as are most other Quality binoviewers. But they lack the attention to detail that could make them truly great binoviewers.

So why spend $900 or more when for $250 you can send them in for an Body and optical Supercharging. (To include my eyepiece holders as pictured below add $100) Not only will it improve them Optically for use with better and lower power eyepieces but the Prisms will be properly held in place as seen below and the sides will come back properly reattached and not glued on. The prisms will also be properly baffled and the internal Dia of the body will be widened.

As you have noticed these binoviewer usually come packaged with a set of 20mm WA or 23mm standard. This is all they can handle because they have been stopped down at the eyepiece holder to make up for their lack of proper baffling throughout the unit. The result is if you try to put those 32mm 50 deg ep's in you feel like you are looking though a set of soda straws. With this service you will now be able to use eyepieces better suited for Deepsky viewing. Like 24mm Panoptic's or my 24mm SWA Ultra's. You will find using these or even lower power eyepiece very useful. Combine this with one of my low power x1 or 1.3x OCA correctors and your scope becomes a truly outstanding deep sky instrument. If you don't have one of these binoviewers you can pick them up cheap on the net or get one of mine on the Black Night Dielectric page. Siebertoptics performs these conversions with as much care as possible but although it is rare we can not be responsible for the possible minor cosmetic issues that might result from conversion.   If you have questions Call or email.   HarrySiebert@nc.rr.com or  919 553 3980

These units are Guaranteed for 2 years with free collimation services. All you pay is shipping.

See below details of the conversion.

These Binoviewers have so much going for them. Now you can unleash their full potential with a simple upgrade and start enjoying what so many others have experienced in the higher levels of the binoviewing hobby.