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11am - 11pm EST 
Monday - Friday

1pm-11pm Sat

Tel:

Cell:

919 553-3980

919-614-4297

FAX:

919 553-3980

eMail:

hs3980@nc.rr.com


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:

 

Telescopes for sale

 

 

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 $649-$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 $99 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

     

 

 

 

 

 

 Eyepiece Adapters 

Filter thread adaptors for odd size filters or eyepiece bottoms were the threads are odd. Just ask for information on your specific needs. harrysiebert@nc.rr.com or call

No More mirror shift during focusing and use a 2" eyepiece with your Meade SCT scope or Meade ETX. You will not believe the difference.

2" Self centering Helical focuser Adapter for Meade ETX 90mm, 100mm, 125mm scopes. $165 (ETXFA2inch)

2" Self centering Helical focuser Adapter for Meade SCT's - Installed on the diagonal of your choice.** Only $119 (SCTFA2inch)

** Diagonal you provide or we supply separate at your request and cost.

2" Non focusing replacement Adapter only - $65 (ETXAdapter2inch)

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With Purchase of the above adapters......  

 2" to 1.25" Standard step down Adapter.$10 (ETXAdapter2"to125")

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$20 discount on any 2" Observatory and Ultra Class eyepiece with purchase of the Meade eyepiece  adapters .

Review  from a customer in Australia

Click Here

 

Cloudy nights discussion link below of the concept.

http://www.cloudynights.com/ubbarchive/showflat.php/Cat/1,2,3,4,5,8,9,10/Number/27343/page/3/view/collapsed/sb/5/o/all/fpart/1

 

 

Click to enlarge pictures below

Above ETX 90mm and the Adapter with Self centering holder and and fine focuser on left. On right the simple adapter W/O focus adjustment.

 

Above 32mm PL 1.25" max field.         Above 2" Siebert 40mm wide field. 

  Try my Observatory class 36mm SWA for the ultimate view the ETX can offer. 

Check out Pictures below text.

Is it advisable to use 2" eyepieces on a Meade ETX scopes?  Is there a benefit?  ETX's have a relatively long focal distance for a small scope and with 1.25" eyepieces cover a relatively small section of the sky.   With the right 2" eyepiece you can at least double the amount of sky you can see.  Sometimes it can come close to triple.  Is this a gain?  The extra apparent field is there, but can't be seen in a 1.25" eyepiece.  A standard 32mm plossl has a maximum apparent field of 52 degs.  With my 32mm Ultra Plus with a 70 deg. apparent field is almost double at 1.8x the amount of sky.   With my 36mm observatory class eyepiece this goes to 75 degs. apparent field, this goes to almost 2.5x the amount of sky.   So this represents a tremendous gain and if you think about it, doubles.   the amount of light you are seeing because you are seeing more of the sky.  This adapter comes with full instructions and is easy to install. The adapter slides over the 1.25" eyepiece socket which increases the internal size because no 1.25" barrel is inserted.  This means that an incredibly low power, wide angle lens can be used with zero vignetting.  Can you image a 40mm with 70 deg. apparent field in your ETX?  Many may have thought that this was impossible, but with this adapter it works perfect and can slew to the zenith with no problem.  Also it does not interfere with the finderscope.. The eyepiece shown in the photograph is my 36mm observatory class.  It has a  75 deg. fov .   This completely changes you low power viewing with the ETX.  

 

2" to 1.25" Helical  focuser

$99 (2-125helical)

This is not for 2" eyepieces since it is the center 1.25" part that focuses

 

 

2" & 1.25" Aluminum Replacement Eyepiece Adapters for Meade 114mm or 4.5" Newtonians or Meade DS 90mm refractors and may fit other Meade scopes.

The 2" and 1.25" replacement upgrades are for the Meade scopes that normally come with a 2" tube with the .965" plastic adapter.  This allows you to use 2" and or 1.25" eyepieces.  

1.25" Replacement Adapter only - $19 (114Adapter1.25inch)

2" Replacement Adapter only - $19 (114Adapter2inch)

2" with 1.25" step-down is - $29  (114Adapter2"-1.25")

2" to 1.25" step-down adapter - $10 (SD2-1.25)

If you get one or more eyepieces below with your adaptor you can minus $10 for each eyepiece. If you have question call or email

EX: If you get 1 Ep's and the $19 adaptor it would be $39 + $19 = $58 total.

EX: If you get 1 Ep's and the $29 adaptor it would be $39 + $29 = $68 total.

If you get 2 Ep's say a 10mm and 18mm and the $19 adaptor it would be $59 + $39 +$19 = $117 total.

If you get 2 Ep's say a 10mm and 18mm and the $29 adaptor it would be $59 + $39 +$29 = $127 total.

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 Performance + 1.25" 10mm  for $49    (114Adapter10)

 Performance + 1.25" 12mm  for $49    (114Adapter12)

 Performance + 1.25" 13mm  for $59    (114Adapter13)

 Performance + 1.25" 14mm  for $59    (114Adapter14)

  Performance + 1.25" 17mm  for $69    (114Adapter17)

 Performance + 1.25" 18mm  for $69    (114Adapter18)

The above eyepieces are ideal for use with these type scopes but this $10 discount offer on the adaptors goes with the purchase of any SiebertOptic's eyepieces.

 

 

.

Call about 2" eyepiece deals.

 

 

 

This replacement adapter allows you to use 2" eyepieces in your Meade 4.5" or 114mm scope or a 90mm Meade DS refractor.   You may also use 1.25" with the optional  1.25" step down adapter. 

 

Is it advisable to use 2" eyepieces on a Meade 114 scope?  Is there a benefit?  With the right 2" eyepiece you can at least double the amount of sky you can see.  Sometimes it can come close to triple.  Is this a gain?  The extra apparent field is there, but can't be seen in a 1.25" eyepiece.  A standard 32mm plossl has a maximum apparent field of 52 degs.   With my 36mm observatory class eyepiece this goes to 70 degs. apparent field, this goes to almost 2.5x the amount of sky.   So this represents a tremendous gain and if you think about it, doubles.   the amount of light you are seeing because you are seeing more of the sky.

.  

 

 
 
 

http://www.cloudynights.com/ubbarchive/showflat.php/Cat/1,2,3,4,5,8,9,10/Number/27343/page/3/view/collapsed/sb/5/o/all/fpart/1

All listed products come with a 30-day money-back guarantee* unless otherwise stated.

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

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