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Blue Fireball 2" Spacer Ring with 1" Extension # S-2D

4.9 (21 Reviews) Read Reviews Write Review
Brand Blue Fireball
Part Number S-2D
Availability available

Product Info

Manufacturer Description

Description/Uses:

  • 2" extension ring/barrel spacer
  • Provides 1" (25.4mm) of spacing
  • Allows you to securely set or vary the spacing between 2" components
  • Useful for making eyepieces parfocal or to change the reduction factor of focal reducers
  • Has standard 2" filter threads (male on one side and female on the other)

Features:

  • Precision machined from aluminum and black anodized
  • Threaded to accept standard 2" astronomy filters

Specifications:

  • Total Length = 1.14" (28.9mm)
  • Extension Provided = 1" (25.4mm)
  • Length of External Male Thread = 0.08" (2.2mm)
  • Thread Specification (External Thread) = M48x0.75 Male
  • Length of Internal Female Thread = Greater than 0.39" (10mm)
  • Thread Specification (Internal Thread) = M48x0.75 Female
  • Maximum Outer Diameter = 2" (50.8mm)
  • Weight = 0.6oz (17g)

Reviews

4.9 (Based on 21 Reviews) 100% of reviewers recommended this product.
Rating Distribution
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    1. Guest

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      Review by Bob C.
      1549332932
      Feb 4, 2019

      5.0 GREAT CAMERA TO COMA CORRECTOR ADAPTER RING

      Pros:

      Cons:

      Comments:

      I PURCHASED AGENA'S 2" OUTSTANDING COMA CORRECTOR PRIMARILY FOR VISUAL VIEWING. I HAVE NOT GOTTEN BACK INTO ASTROPHOTOGRAPHY BUT ACCORDING TO DIRECTIONS AND ACTUAL FITTING OF THIS RING TO THE COMA CORRECTOR, WITH A 'T' RING IT SHOULD BE A PERFECT FIT FOR YOUR CAMERA TO THE CC. BECAUSE I HAVE YET TO USE THE RING I CAN ONLY SAY THAT IT GETS 5 STARS BASED ON THE EXCELLENCE OF THE GSO COMA CORRECTOR THAT IT CAME WITH!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      Review by Gerrit B.
      1535422667
      Aug 27, 2018

      5.0 Nicely made

      Pros:

      Cons:

      Comments:

      This adapter is well made and threads very smoothly. Recommended!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      Review by Daniel D.
      1533954562
      Aug 10, 2018

      5.0 Helps back focus

      Pros:

      Cons:

      Comments:

      This was the spacer I needed to get my back focus to the right distance

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    4. Guest

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      Review by Steven C.
      1520047477
      Mar 2, 2018

      5.0 As Expected

      Pros:

      Cons:

      Comments:

      This spacer was just as expected. No trouble with the threads (internal or external). Would highly recommend.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      Review by Kurt K.
      1513738983
      Dec 19, 2017

      5.0 Great price spacer

      Pros:

      Cons:

      Comments:

      Spacer works great. Great price to match.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    6. Guest

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      Review by Cameron F.
      1496039099
      May 28, 2017

      5.0 Good fit on the threads

      Pros:

      Cons:

      Comments:

      Good fit on the threads and the machining was very good.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    7. Guest

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      Review by Kevin E.
      1495886224
      May 27, 2017

      5.0 Nice fit and finish

      Pros:

      Cons:

      Comments:

      Nice fit and finish

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    8. Guest

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      Review by Leon P.
      1487611356
      Feb 20, 2017

      5.0 Spacer Ring

      Pros:

      Cons:

      Comments:

      Nice spacer. Clean Threads. Nice and black. Used to place the two coma corrector at the right spot in the focuser on a Z10. From what my eyes can tell, seem like this is just the right length for 1.5" eyepieces ( the 2-1.5" adapter adds 10mm) and for 2" you need to use a parafoculizing ring or another roughly 10mm spacer.

      High quality and works perfect.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    9. Guest

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      Review by John S.
      1486926331
      Feb 12, 2017

      5.0 M48 spacer

      Pros:

      Cons:

      Comments:

      Exactly what I needed and what was advertised. Agena takes care of you.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    10. Guest

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      Review by F. A.
      1483640075
      Jan 5, 2017

      5.0 It's a well made spacer

      Pros:

      Cons:

      Comments:

      It's a well made spacer ring, and worked well!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    11. Guest

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      Review by Doug Z.
      1482596083
      Dec 24, 2016

      5.0 Good parts...Excellent service!

      Pros:

      Cons:

      Comments:

      The title sums it up. I have purchased several of the Blue Fireball products from Agena, and they are always of uniformly good quality. And Agena's service is always second to none. Fast shipping. Never disappointed.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    12. Guest

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      Review by Gomezdb of Calgary, Canada.
      1453593600
      Jan 23, 2016

      4.0 I'd buy it again

      Pros:

      Compact,Easy to Use,Lightweight

      Cons:

      Comments:

      I use it to get the desired backfocuse when using the Astro-Physics focal reducer with my 9.25 EdgeHD

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    13. Guest

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      Review by ABCxyz of Cle Elum, WA.
      1444435200
      Oct 9, 2015

      5.0 Perfect for the GSO Comma Corrector

      Pros:

      Strong Construction,Easy to Use,Lightweight

      Cons:

      Comments:

      This spacer is perfect for setting my GSO Comma Corrector in the proper position in the focuser for my two F5 Newtonians.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    14. Guest

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      Review by Big Ugly Guy of Tucson.
      1435449600
      Jun 27, 2015

      5.0 Just buy it

      Pros:

      Lightweight,Easy to Use,Strong Construction,Accurate

      Cons:

      Comments:

      You got this far because you need a spacer this long. It threads easily and securely.

      Like most threaded adapters, a little bit of wax burnished into the threads will minimize galling.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    15. Guest

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      Review by JJ of South Dakota.
      1435363200
      Jun 26, 2015

      5.0 Very nice machine work

      Pros:

      Accurate,Strong Construction

      Cons:

      Comments:

      Excellent extension

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    16. Jesús Muñoz

      Jesús Muñoz New Member

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      Review by Jose of Queretaro, Mexico.
      1422662400
      Jan 30, 2015

      5.0 Perfect fit

      Pros:

      Strong Construction,Great finish,Easy to Use

      Cons:

      Comments:

      Blue Fireball products are always a secure purchase.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    17. Guest

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      Review by Ger of Canada.
      1401494400
      May 30, 2014

      5.0 Great spacer

      Pros:

      Accurate,Well Made

      Cons:

      None

      Comments:

      This spacer ring is used to extend my adapter so that some eyepieces can't hit my filters. Very useful and well made

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    18. Guest

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      Review by cv of Reading, MA.
      1385769600
      Nov 29, 2013

      5.0 Just what I needed

      Pros:

      Accurate,Compact,Lightweight,Strong Construction

      Cons:

      Comments:

      Spacer of great construction. Threads easily.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    19. Guest

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      Review by Geyserland Observatory of Rotorua New Zealand.
      1370044800
      May 31, 2013

      5.0 I would buy this product again

      Pros:

      Lightweight,Strong Construction

      Cons:

      No

      Comments:

      I use this spacer to get the right distance in my optical system an the telescope, it is fitting perfect and the stars are now nice round and clear on my images for my research.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    20. Guest

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      Review by Chuck Hunt of Brook Park, Ohio.
      1360368000
      Feb 8, 2013

      5.0 2" Spacer

      Pros:

      Strong Construction,Accurate,Lightweight,Compact,Easy to Use

      Cons:

      Comments:

      I screw this adapter into my 2" to 1-1/4" eyepiece adapter to get more distance from the 2" filter that screws into the spacer ring when inserting eyepieces. In my case some of my eyepieces were coming close or even touching the filter glass without the spacer ring. This adapter takes care of that problem.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    21. Guest

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      Review by Mara Costa of Guarulhos, Brazil.
      1306886400
      May 31, 2011

      4.0 3rd FTR

      Pros:

      Strong Construction

      Cons:

      Comments:

      We always see 14mm, 28mm FTR Rings and Baader Filter to change focal lenght at Hyperion Eyepieces. The height is the same as Baader Filter and can be used like one. It don't creates glow inside eyepiece and are strong enough like a original FTR.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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