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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         Products:

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.

Astrographs/Telescopes

Camera Focus Adaptors

Camera Adapters - Universal

H-Alpha Focus Accessories

Converters

Special binoviewer services and products you cant get anywhere else 

Also can  >  Click here.   And here.

ICP's Image Correction Prisms for Newts

Diagonals

Extension Tubes

Large refractor modular OTA's

Eyepiece Comparisons

Focal Length Reducers

Miscellaneous

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

      Fabrics

      Purses

BT70 and RA-88 Eyepieces Click here

KOWA Eyepieces Click here

Miyauchi Eyepieces 29mm dia 1.3" dia 1.338"  dia Dia eyepieces for: Saturn II/III and MIYAUCHI 90 and 45 deg Binoculars. The 10mm's have minimal ER 9mm (me09) $199 each60deg 10mmER 10mm(me10)$199 each60deg 10mmER 11mm(me11)$199 each60deg 15mmER 14mm(me14)$199 60deg  15mmER 15mm(me15)$199 60deg  15mmER 18mm(me18) $199 each60deg 18mmER 19mm(me19)$199 each70deg  19mmER 20mm(me20)$199 each70deg  20mmER 25mm(me25)$199 each50deg  20mmER 26mm(me26)$199 each50deg  20mmER 27mm(me27)$249 each50deg  20mmER 28mm(me28)$249 each50deg  20mmER Items above are priced individually.    You will need two for a set for your binoculars.

. .   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. Find the Focal length of your Binoculars below. Miyauchi 22x60 F.I. 300mm Miyauchi 20x77 F.I. 400mm Miyauchi 33x71 F.I. 568mm Miyauchi 22x71 F.I. 568mm Miyauchi 20x100 F.I. 500mm --Galaxy addition. Miyauchi 26x100 F.I. 500mm Miyauchi 37x100 F.I. 500mm Miyauchi 33x100 F.I. 750mm Miyauchi 25x141 F.I. 625mm ------------------------------ Stock Eyepieces typical below 25mm = 20x 19mm = 26x 14mm = 37x