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         Products:

Eyepieces From .965" / 1.25" / 2.0" / 2.7" / 3.0" / 4.0" / 4.3"

BT70 RA88 / Miyauchi eyepieces

Advanced Barlow Lenses including: Modular and 4 element Telecentric magnification multipliers

1.25" and 2" Advanced Binoviewers Starting FMC units at $399

 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 including Miyauchi Starting at $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

Eyepieces  

Eyepiece Comparisons

Focal Length Reducers

Miscellaneous

Observers Hood - light blocking 

Planetary Fleece Blanket 

PST Accessories  

Astrotech and William's Optics Focuser Services

Telecentric Barlow Lenses

Refractor Knobs

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

For 1.3x and 1.3x-2.0x-2.7x Multi-Mag Newtonian/Refractor Instructions for All 2" and 1.25" Binoviewers see Pic's 1 - 19

For Regular Zero and Multi Mag OCA's click here

All Power Mag Wheels  PMW------Starting at Zero and 1.3x. All are setup the same as the regular 1.3x OCA's below. For Dob/Newt (shipped in default position or picture #1.)  For refractor setup use illustrations 9 - 12 

(See text under illustration #12 for more instructions)

The only difference between the multi-mag above for the 2" units and the multi-mag below for the 1.25" units is the large upper piece that threads into the bottom of the 2" Elites above and it's counterpart below for 1.25" binoviewers that has an eyepiece holder for accepting a 1.25" focuser shaft.    

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((For Power wheel models only)) : You need to adjust the slide tube for focus to fit all the magnifications in your telescopes focuser range. Give more clearance away from the mirror by sliding the tube out to the right and you will have more in focus freed up at your lowest power setting if needed. Give yourself about 1/4" to 1/2" focuser  in-travel and it should be good and  allow you to focus your higher powers without running out of out-travel .  (Any questions call email) Personal email> harrysiebert@nc.rr.com or Main>#(1-919-553-3980)

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