Hours:

11am - 11pm EST 
Monday - Friday

1pm-11pm Sat

Tel:

Cell:

919 553-3980  Primary
After 4 rings will ring through to Personal below.

 919-614-4297 personal

FAX:

919 553-3980 Call before Faxing

eMail:

harrysiebert@nc.rr.com

 Q&A

hs3980@nc.rr.com  Request PayPal invoice

 


Thank you for visiting Siebert Optics!
Serving Large Observatories and the Amateur Astronomy Community alike.

200 Short Johnson Road
Clayton, NC 
USA  27520

 

Place Online Order

     (opens in new window)

 

 

Home Page

About Siebert Optics

Contact Information

 

_______________________________

 

         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 

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

     

 

 

 

 

 

 


Thank you for visiting Siebert Optics!
Serving Large Observatories and the Amateur Astronomy Community alike.

1.25" and 2" Barlow Lenses and Telecentric Barlows. 

Brass Barlows for your Brass telescope (remember brass is heavier then aluminum.) Brass add $50 to the standard 1.25" Barlows below. $100 to all standard 2" below.

Regular,  High Performance Telecentric, modular, Zoom and Power wheel Barlows 

See our new Power Mag Wheel Barlow's. Click here

Telecentric Barlows: 2.5"/2.7"/ 3" 1.5x - 2.5x Click Here

Ad #1

.965" Barlows

Ad #2

1.25" Superior Performance Barlows

Ad #3

1.25" and  2" and T-2 Modular, Zoom and Telecentric Barlows
Ad #4 

2"  Superior Performance Barlows

1.25x - 3.5x

 Ad #1

 .965" and Duel Format Barlows

1.5x

1.75x

x2

All these Barlows are Duel Format  >>

It uses the best quality optics and is fully coated for maximum light transmission.  It also fully corrects for color aberrations. 

These Barlows are recommended for eyepieces that are 26mm standard field of view and more powerful. More powerful widefields are fine too.

 1.5x Barlows

A) This Barlow sells for $89 .965 inlet w/ .965 outlet  (Bar965-1.5x)

B) This Barlow sells for $89 .965 inlet w/ 1.25" outlet  (Bar965h1-1.5x)

C) This Barlow sells for $99 Duel Format barlow.(Bar965125h1-1.5x)

-----------------------

1.75x Barlows

D) This Barlow sells for $89 .965 inlet w/ .965 outlet  (Bar965-1.75x)

E) This Barlow sells for $89 .965 inlet w/ 1.25" outlet  (Bar965h1-1.75x)

F) This Barlow sells for $99 Duel Format barlow.(Bar965125h1-1.75x)

-------------------------------

2x Barlows

G) This Barlow sells for $89 .965 inlet w/ .965 outlet  (Bar965-x2)

H) This Barlow sells for $89 .965 inlet w/ 1.25" outlet  (Bar965h1-x2)

I) This Barlow sells for $99 Duel Format barlow.(Bar965125h1-x2)

Step-Down Adaptor W/ 1.25"OD and .965"ID $15 (125965)

Step-Down Adaptor W/ 2"OD and 1.25"ID $15 (2125)

 

  

 Want to make sure you are getting exactly the correct item?

  #1) This Barlow   .965 inlet w/ .965 outlet.  

  #2) This Barlow   .965 inlet w/ 1.25" outlet  the 1.25" outlet is for 1.25" eyepieces you might have.

   #3) Duel Format. Can be used for 1.25" and .965" eyepieces.


The adaptor  W/ 1.25"OD and .965"ID (125965)   This adapter is for those who get the #2 model and need the adapter when they want to use their .965 eyepieces. Or want to use their #2 model .965 inlet w/ 1.25" outlet  Barlow in a 1.25" focuser and need the adapter to fit the .965 inlet into their 1.25" scope.

 Ad #2

For Telescope F2.8 and up.

These equal to or are better color corrected then any "ED/APO" Barlow available. 4-6oz

1.25" Original Performance Quality Barlow Lenses 

 Self Centering model add $30 Click here for details

 But you are guaranteed to be purchasing the highest quality barlows both in terms of workmanship and optical quality presently on the market.  For more information see the information below the Barlow pictures on the right.* 

Barlow can be ordered in Brass. Add $50

Barlows are 4-6 oz or less and threaded for filters

1.5x Barlow: $149 (BAR12515xt)

1.75x Barlow: $149 (BAR125175xt)

 2x Barlow:  $149 (BAR12520)  

2.5x Barlow: $149 (BAR12525)  

 3.0x Barlow.$149 (BAR12530)

3.5x Barlow.$149 (BARx35)

4.0x Barlow.$149 (BARx4)  

4.5x Barlow.$149 (BARx4.5)

5.0x Barlow.$149 (BARx5.0)  

1.25" Feather touch

Adaptor W/ 1.25"OD and .965"ID $15 (125965)

Step-Down Adaptor W/ 2"OD and 1.25"ID $15 (2125)

   

Are all Barlows the same? 

The answer is NO! Click here to find out why.

            Self Centering model shown.

This design makes good baffling possible. 

Many Barlows use relatively inexpensive optics that are configured out to about 50% of the total Dia. This is not too bad if you have a slow scope f7 on up. If you have an f6 or lower the light cone is much larger and penetrates a larger area of the optic. Use this area and serious distortion will start to show up. All Siebert optics lens are corrected out to 90% of edge leaving the place for a retainer to hold the optics. That means that the field will remain undistorted in fast scopes. 

Siebert Optics does not expect everyone to know many of these things.  That is why we have made sure that when you purchase a Siebert optics product you are getting better quality then you might realize. There has never been a cheap Barlow on this page and never will be!                

      

 

 Ad #3

2" and 1.25" Telecentric Ultra  Barlows 

For your most demanding Photographic and Visual Applications.

Barlow can be ordered in Brass. Add $70

Barlows are 8 oz or less

     All Ultra 2" Telecentric Barlows are 10oz or less.

These have a 4 element design similar to the Powermate. Uses larger lens elements then competing models. 

1.5x  2"$249  8.5oz (BAR2-1.5X)

1.75x  2"$249  8.5oz (BAR2-1.75X)

2x  2"$229 8.5oz (BAR2-2X) 

2.25x  2"$229  9.5oz(BAR2-2.25X)

2.5x  2"$229  9.5oz(BAR2-2.5X)

2.75x  2"$229  9.5oz(BAR2-2.75X)

3x  2" $229  9.5oz(BAR2-3X) 

3.5x  2"$229 9.5oz (BAR2-3.5X)

4x  2" $249   10oz(BAR2-4X) 

2" Feather touch Self Centering model add $50 Click here for details

Add Free low profile 2" to 1.25" step-down adapter upon request 

---------------------------------------

3.0x  1.25"  $159    5oz(BAR125-30X)

 

 

2.5x  1.25"  $159    5oz(BAR125-25X)

 

 

2.0x  1.25"  $159    5oz(BAR125-20X)

 

1.75x  1.25"  $159   5.oz(BAR1.25175X)

 

1.5x   1.25"  $159   5.oz(BAR1.25-1.5X)

 

1.3x   1.25"  $159   5.oz(BAR1.25-1.3X)

 

1.25" Feather touch Self Centering model add 30$ Click here for details

Adaptor W/ 1.25"OD and .965"ID $20 (125965)

If you purchase a 2" barlow We will Add a Free low profile 2" to 1.25" step-down adapter upon request 

Modular, Zoom and Regular Telecentric Barlows

 

Click here for the New 2" T-2 modular Barlows.

Click here for New Modular Zoom Telecentric Barlow

 

Our Lower element is larger then its TV counterparts in most of our Telecentric Barlows up to x4. At 24mm Dia compared to 17mm Dia although the 17mm will fully illuminate any 1.25" and 2" eyepiece. Our x4 and up optics are the same size as the TV Barlows and will illuminate a F.S. up to 65mm.                                                                      


Other then the super high quality Powermates TV makes, these are one of the only other barlows that offer the added benefit of a 4 element Telecentric image. Also maintains the FOV and ER characteristics of your EP's. The 2" 2x units have a clear aperture and magnification ratio to illuminate a 48mm field stop fully. Will act as a flattener so no Paracorr should be necessary in faster Newtonians. You will not be disappointed if you try one of these. Elements are multicoated. Guaranteed  with a 30 day return policy..

                                                                             

 

         

For Feather touch Self centering eyepiece model can be applied for $50

 

 

 

 

Ad #4

2" Performance Barlows featuring 38mm CA Super dielectric coated.

 These equal to or better corrected then any "ED/APO" Barlow available.

For your most demanding  Visual Applications in the fastest scopes.

Barlow can be ordered in Brass. Add $70

Barlows are 8 oz or less

1.5x 2"$219 (BAR2-1.5bX)

1.75x 2"$219 (BAR2-1.75bX)

2.0x 2"$219 (BAR2-2bX)

2.25x 2"$219 (BAR2-2.25bX) 

2.5x 2"$219 (BAR2-2.5bX )

2.75x 2"$219(BAR2-2.75bX) 

3.0x 2" $219 (BAR2-3bX) 

Comes standard with Nylon tip thumb screws.

2" Feather touch Self Centering model shown add $50 Click here for details

If you purchase a 2" barlow We will Add a Free low profile 2" to 1.25" step-down adapter upon request 

 2" Performance 38mm CA Barlows

 

You will not be disappointed if you try one of these. Elements are Dielectric Coated. Guaranteed  with a 30 day return policy.                                                                             

         

For Feather touch Self centering eyepiece model can be applied for $50

 

  

 

Ad #5

1.25" and 2" Modular Barlow Lenses all scopes.

1.25" Models below First.

Barlows are 5 oz or less and are Filter thread compatible..

The First 3 are the S Barlow Series      

A) 1.5x - 2.0x  Modular. $169 (BAR1520m)    

B) 2.0x - 3.0x  Modular. $169 (BAR2030m)           

C)2.0x - 2.5x - 3.0x  Modular.  $199 (BAR2030m)  

D)1.25x - 1.4x, 1.5x - 1.7x  Modular $239 (BAR12517m)  

E)1.5x, 2.0x, 2.5x Barlow:  $239 (BAR1525m)

F)1.5x, 2.0, 2.5x, 3.0x Barlow: $299  (BAR1530m)

===========

Feather touch Self Centering model add $30 Click here for details

Adaptor W/ 1.25"OD and .965"ID $20 (125965)  

2" Models below.

 

2" Models below.

H)1.25x - 1.4x, 1.5x - 1.7x  Modular $299 (BAR212517m              

I)1.5x - 2.0x  Modular.  $299 (BAR21520m)

J)2.0x - 2.5x  Modular.  $299 (BAR2025m) 

K)2.5x - 3.0x  Modular.  $299 (BAR22530m)   

L)2.0x - 2.5x - 3.0x  Modular.  $299  (BAR22530m)    

Feather touch Self Centering model add $50 Click here for details

This is the Siebert Optics Modular Barlow Series.

Instructions for all the (MB) click here.

Click on picture for more details.

Here is a multi power Barlow. Uses the best optics and will work in other configurations such as a corrector lens for binoviewers, Camera focus corrector, can also thread into a standard eyepiece since all components have standard filter threads. Can be used in more then one device at a time. etc...... This product has a 60 day money back guarantee. 

This design makes good baffling possible. 

Instructions for all the (MB) click here.

All barlows have internal baffles including ultra-flat black internal surfaces to eliminate  any internal reflections.  Lens elements are edge blackened to increase contrast.  

Above is the 2x Barlow using all T-6 Aluminum.  It comes with bottom threaded for standard light filters.

 2/10/02     

 

2" and 1.25" below.

      

                

 

 

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).

We welcome
International orders!.

We accept Visa, Mastercard,

Discover

  American Express. U.S. Money Orders, and Personal Checks (held 10 working days for clearing)Online payments may be made securely through

  .

 

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).

We welcome
International orders!.

We accept Visa, Mastercard,

Discover

  American Express. U.S. Money Orders, and Personal Checks (held 10 working days for clearing)Online payments may be made securely through

  .

 

Babelfish.jpg (12943 bytes)

 

 


Free counters provided by Honesty.com.