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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 

ICP's Image Correction Prisms for Newts

 

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Large refractor modular OTA's

 

Eyepiece Comparisons

 

Focal Length Reducers

 

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Planetary Fleece Blanket 

 

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Telecentric Barlow Lenses

 

Zero Magnification Adapter

 

 

 

 

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Saturn Earrings  

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1.25" & 2" FMC Ultra Series Superwide (70+)  

High Eye Relief (20mm's) Eyepiece.

 

See our UT Monocentrics and Planesphere eyepiece line. Click here.

Brass eyepieces for your Brass telescope check Ad's for details (remember brass eyepieces are heavy.) See below

See 2" Observatory Series for your lower powers
How do these stack up against your better eyepieces. Click here to go to our eyepieces comparison page

Want your 1.25" or 2" ultra with reticules of different kinds click here 

               All 2" eyepieces are 8 oz

 

 

             

 

 

 

 Below is a special edition of Siebert eyepieces.  They have 20mm's of eye relief because of the extra-ordinary size lens used (22mm's dia.).  The bottom magnifier doublet  measures 25mm's dia.  This is much larger than the magnifiers used in most Lanthanum and Nagler series eyepieces, especially in sizes from 7mm-15mm's.   The eyecup is very comfortable to use and has a quick fold down feature. 

 

 This eyepiece may be an astrophotographers dream since it allows for extremely high power with the use of an additional barlow with virtually no vignetting. In tests done with various cameras the 20mm's of eye relief allowed for there to be no limiting to the fov. This allowed for an entire image such as the moon to be photographed as a single image in magnifications exceeding 120x.  With most eyepieces the moon would have to be photographed in composite images instead of one huge image.  This is the first eyepiece that has allowed me to photograph with this type of magnification while keeping the moon in a single field with a little room around the edges to spare.  This allows for the widest possibly photograph area at some of the widest FOVs.    But the combined high eye relief and superwide field makes a big difference with some CCD chips that need the ER so as not to vignette. 

In short these are guaranteed to outperform in terms of fov, eye relief  and  sharpness (on and off axis) than any eyepiece in their price range.   I will let others determine thru review and otherwise how these stack up against the really high dollar eyepieces.  There is a full 30 day money back guarantee (less shipping) on these eyepieces.  

 

Because of the costs involved in assembling these eyepieces these are only subject to a 5% discount on the purchase of 3 or more.

 

On the left is a few pictures to give you the idea of the size and dimensions of the below eyepieces.  Also included is a size comparison of the 9mm to a Meade 9.5mm plossl.  If you have any further question please feel free to contact us. 

 

New Brass FMC eyepieces below.

7mm super wide angle 

This is a FMC 6 element eyepiece which produces extremely wide angle at all magnifications for 1.25" or 2" diameter.   The optics are very high quality and Multicoated for maximum light transmission. Also using the 6 element lens system, it fully corrects for color aberrations.  These eyepieces have a 70+ degree field of view and eye relief of 20mm.  Threaded for  light filters.

The 1.25"  eyepieces sell for $179. (EP125-7Ultra) Brass add $50*

  The 2" eyepieces sell for $199.(EP2-7Ultra) Brass add $70*

Services all F ratios well.

       

  

+  

 

At 100x magnification, when viewing the moon, not only does it produce an extremely sharp and crystal clear view with perfect color quality, but takes in the entire view of the moon with room to spare.

9mm super wide angle 

This is a FMC 6 element eyepiece which produces extremely wide angle at all magnifications for 1.25" or 2" diameter.   The optics are very high quality and Multicoated for maximum light transmission. Also using the 6 element lens system, it fully corrects for color aberrations.  These eyepieces have a 70+ degree field of view and eye relief of 20mm.  Threaded for  light filters.

The 1.25"  eyepieces sell for $179. (EP125-9Ultra) Brass add $50*

  The 2" eyepieces sell for $199.(EP2-9Ultra) Brass add $70*

Services all F ratios well.

       

  

+  

 

At 100x magnification, when viewing the moon, not only does it produce an extremely sharp and crystal clear view with perfect color quality, but takes in the entire view of the moon with room to spare.

10mm super wide angle 

This is a FMC 6 element eyepiece which produces extremely wide angle at all magnifications for 1.25" or 2" diameter.   The optics are very high quality and Multicoated for maximum light transmission. Also using the 6 element lens system, it fully corrects for color aberrations.  These eyepieces have a 70+ degree field of view and eye relief of 20mm.  Threaded for  light filters.

The 1.25"  eyepieces sell for $179. (EP125-10Ultra) Brass add $50*

  The 2" eyepieces sell for $199.(EP2-10Ultra) Brass add $70*

Services all F ratios well.

       

  

+  

 

At 100x magnification, when viewing the moon, not only does it produce an extremely sharp and crystal clear view with perfect color quality, but takes in the entire view of the moon with room to spare.

11mm superwide angle

This is a FMC 6 element eyepiece which produces extremely wide angle at all magnifications for 1.25" or 2" diameter.   The optics are very high quality and Multicoated for maximum light transmission. Also using the 6 element lens system, it fully corrects for color aberrations.  These eyepieces have a 70+ degree field of view and eye relief of 20mm.  Threaded for  light filters.

The 1.25" eyepieces sell for $179. (EP125-11Ultra) Brass add $50*

   The 2" eyepieces sell for $199   .(EP2-11Ultra) Brass add $70* >>> See picture.

Services all F ratios well.

    

This is almost identical in every respect to the 9mm above including the wide aperture. It maintains extremely sharp image quality and maintains perfect color quality. 

13mm wide angle

This is a FMC 6 element eyepiece which produces extremely wide angle at all magnifications for 1.25" or 2" diameter.   The optics are very high quality and Multicoated for maximum light transmission. Also using the 6 element lens system, it fully corrects for color aberrations.  These eyepieces have a 70+ degree field of view and eye relief of 20mm.  Threaded for  light filters.

The 1.25"  eyepieces sell for $179. (EP125-13Ultra)  Brass add $50*

 The 2" eyepieces sell for $199.(EP2-13Ultra) Brass add $70*

Services all F ratios well.

        

 

This is almost identical in every respect to the above including the wide aperture. It maintains extremely sharp image quality and maintains perfect color quality. 

15mm wide angle

This is a FMC 6 element eyepiece which produces extremely wide angle at all magnifications for 1.25" or 2" diameter.   The optics are very high quality and Multicoated for maximum light transmission. Also using the 6 element lens system, it fully corrects for color aberrations.  These eyepieces have a 70+ degree field of view and eye relief of 20mm.  Threaded for  light filters.

The 1.25"  eyepieces sell for $179. (EP125-15Ultra) Brass add $50*

 The 2" eyepieces sell for $199.(EP2-15Ultra) Brass add $70 *

Services all F ratios well.

  

This is almost identical in every respect to the above including the wide aperture.  It maintains extremely sharp image quality and maintains perfect color quality. 

17mm wide angle

This is the 1.25" FMC 4 element eyepiece which produces extremely wide angle at all magnifications depending on your focal length. The optics are very high quality and Multi coated for maximum light transmission.  Its field of view is 70+ degrees and eye relief is 20mm.  Threaded for light filters.

The 1.25"  eyepieces sell for $119. (EP125-17Ultra) Brass add $50*

 The 2" eyepieces sell for $149.(EP2-17Ultra) Brass add $70*

Services all F ratios well.

This eyepiece maintains extremely sharp image quality and maintains perfect color quality. 

18mm wide angle

This is the 1.25" FMC 4 element eyepiece which produces extremely wide angle at all magnifications depending on your focal length. The optics are very high quality and Multi coated for maximum light transmission.  Its field of view is 70+ degrees and eye relief is 20mm.  Threaded for light filters.

The 1.25"  eyepieces sell for $119. (EP125-18Ultra) Brass add $50*

 The 2" eyepieces sell for $149.(EP2-18Ultra) Brass add $70*

Services all F ratios well.

This is almost identical in every respect to the above including the wide aperture. It maintains extremely sharp image quality and maintains perfect color quality. 

19mm super wide angle

This is the 1.25" FMC 4 element eyepiece which produces extremely wide angle at all magnifications depending on your focal length. The optics are very high quality and Multi coated for maximum light transmission.  Its field of view is 70+ degrees and eye relief is 20mm.  Threaded for light filters.

 The 1.25" eyepiece sells for $119  (EP125-19Ultra)Brass add $50*

 The 2" eyepiece sells for $149  (EP2-19Ultra)Brass add $70*

 Services all F ratios well.

 

 

This is almost identical in every respect to the above including the wide aperture. It maintains extremely sharp image quality and maintains perfect color quality. 

 

24mm  wide angle high transmission EP

Few Element Design for binoviewers.

This is a 1.25" 24mm FMC 3 element eyepiece which produces extremely wide angle at all magnifications and has very high light transmission. This eyepieces is made mainly for DSO's but is also good on planets. The field of view is 65 degrees and the eye relief is 20mm. Threaded  for light filters.

 The 1.25" eyepiece sells for $129  (EP125-24Ultra)

 The 2" eyepiece sells for $159  (EP2-24Ultra) Brass add $70*

Best for F/7 and up as a single eyepiece As part of a binoviewer system are good at F3.5 on up. May be ok under but not tested.

Click here to see the eyepieces comparison page

 

 

 

 

 On right is a 1.25" 24mm Ultra with slide adjustable eyecup

 It maintains extremely sharp image quality and brightness on scopes f/7 on up.  Not made for fast scopes without supporting optical correctors.  Optimized for binoviewers for scopes of all kinds and f/ratios.  For fast scopes and non-binoviewer applications see my 26mm -- 28mm Ultra. 

 

28mm Ultra Eyepiece for all including fast scopes

This FMC eyepiece a 58 deg. fov and 20mm's of eye relief. It is great in fast scopes and is threaded  for light filters.   Great down to f/4

 

1.25" U $159  (125U28) FOV 58 deg

2" U $169  (2U28) FOV 58 deg Brass add $70* 

  F/4-F/15 or Great as part of a binoviewer system at all F ratios.

 

 

 

 

 

 

 

 

      

 

 

 

35mm Ultra Eyepiece for all including fast scopes

This FMC eyepiece  a 45 deg. fov and 20mm's of eye relief. It is great in fast scopes and is threaded  for light filters.   Great down to f/4

 

1.25" costs $129  (125U35)

2" costs $149  (2U35) Brass add $70*  

  F/4-F/15 or Great as part of a binoviewer system at all F ratios.

 

      

 

 

 

See Products list for complete list of prices and configurations.

 

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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