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Blue Fireball 1.25" Spacer Ring with 0.25" Extension # S-1A
| Brand | Blue Fireball |
| Part Number | S-1A |
| Availability | available |
| Share |
Product Info
Manufacturer Description
New version with longer threads
Description/Uses:
- 1.25" extension ring/barrel spacer
- Provides 0.25" (6.4mm) of spacing *
- Allows you to securely set or vary the spacing between 1.25" components
- Useful for making eyepieces parfocal or to change the reduction factor of focal reducers
- Has standard 1.25" filter threads (male on one side and female on the other)
Features:
- Precision machined from aluminum and black anodized
- Threaded to accept standard 1.25" astronomy filters
Specifications:
- Total Length = 0.37" (9.4mm)
- Extension Provided = 0.25" (6.4mm) *
- Length of External Male Thread = 0.12" (3mm)
- Thread Specification (External Thread) = M28.5x0.6 Male
- Length of Internal Female Thread = 0.2" (5mm)
- Thread Specification (Internal Thread) = M28.5x0.6 Female
- Maximum Outer Diameter = 1.25" (31.7mm)
- Weight = 0.1oz (3g)
Additional Information:
* To get a spacing of 0.25" with this spacer, your accessory must fit completely into the female 1.25" thread of this adapter. The length of the female T thread is only 0.2". If your accessory has a male 1.25" thread longer than this, then it will not screw in fully and the extension provided will be greater than 0.25".
Reviews
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May 3, 2019
Good transaction
Pros: Cons: Comments:Could not have been a better transaction. The first package was lost in the mail and they sent a replacement right away. Very happy with the customer service. Very good product.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Aug 6, 2018Eyepiece barrel extender
Pros: Cons: Comments:This worked perfectly to extend my eyepiece length and allow me to get it parfocal to the camera with a vixen flip mirror.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Jan 29, 2018Does what it's supposed to do
Pros: Cons: Comments:It's a spacer ring. I'm using it to add backfocus to binoviewers being used with an 8-in dobsonian. Sits between the binoviewers and a 1.6x barlow, and the combo allows focus. Works as expected and comes in a variety of lengths so that I could get just enough extension to focus without encountering vignetting.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Aug 21, 2017Simple product, worked perfectly
Pros: Cons: Comments:This is a fine product at a great price. Worked perfectly with my imaging setup to get more FOV with a focal reducer.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Oct 17, 2014Saved my video camera
Pros:Strong Construction,Easy to Use,Lightweight
Cons: Comments:My SCB-2000 camera's 1.25" adapter nose piece was too short, because my camera has be pulled back, out of the focuser's draw tube about 0.70".
Bottom Line: Would you recommend this item? Yes
Otherwise it will not focus. The camera fell off the telescope once, saved only by the video cable.
Adding the Blue Fireball .75" spacer to the nose piece, insures my camera rig stays on the telescope, all night long!This review was provided courtesy of AgenaAstro.com
Jun 20, 2013One ring to rule them..........
Pros:Strong Construction,Compact,Accurate,Lightweight,Easy to Use
Cons: Comments:I shop exclusively with Agena for my accesories; this 1.25 spacer ring was needed for my binoviewers and it does what I needed it to do.
Bottom Line: Would you recommend this item? Yes
Shipping is always fast and the products are always quality!This review was provided courtesy of AgenaAstro.com
Jesús Muñoz New Member
- Skill Level
- Unknown
- Time with Product
- Unknown
- User Notes:
- Review by Powerstar8 of Mexico.
Feb 8, 2013Perfect fit and finish
Pros:Easy to Use,Strong Construction,Accurate
Cons: Comments:Perfect finish make this adapter to fit flawlessly. It just work perfect.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
David Dearden New Member
- Skill Level
- Unknown
- Time with Product
- Unknown
- User Notes:
- Review by dvdearden, amateur astrophotographer of Mapleton, UT.
Nov 30, 2012Inexpensive and simple
Pros:Easy to Use
Cons: Comments:I use the spacer ring to get the proper spacing between a 0.5x focal reducer and my CCD camera. This ring threads into the focal reducer and the camera nosepiece simply and as advertised.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Dec 18, 2010Strong construction
Pros:Strong Construction,Compact
Cons:None
Comments:Well made adapter, helpful for reaching focus with some astro cameras or eyepieces.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
AstroGuy1 New Member
- Skill Level
- Unknown
- Time with Product
- Unknown
- User Notes:
- Review by calastro of California.
May 8, 2009Great product...lots of uses!
Pros:Does its job well,Doesn't need improvement,Inexpensive
Cons:None
Comments:For what it was intended, this 1" spacer simply does its job and does it well. When used with the GSO 0.5x focal reducer in combination with an eyepiece or with a camera (webcam, video, etc.), it further deceases the effective focal ratio of the optical system.
Bottom Line: Would you recommend this item? Yes
However, there are some other potential uses for this little accessory. I use mine attached to a LCL-902K CCD video camera with a 1/2" Sony CCD chip. The extension tube alone can be used with the camera to provide a convenient "nosepiece" for the camera to attach to a 1 1/4" focuser.
It can also be used with the focal reducer at the front or the back of the Extension Tube. In other words, I can attach the focal reducer to the camera, and then use the tube as a "nosepiece". However, I can also attach the Extension Tube directly to the camera to function as both an extension tube and a nose piece and attach the focal reducer to the front of the combination.
If you are modifying a webcam for astro use, it can perform the same functions as both an extension tube with the focal reducer or as a nosepiece for the camera.
What else can be said? It does what it was designed to do. It is inexpensive and lends itself to a number of combinations for astro imaging. I really can't see where it could be improved upon!This review was provided courtesy of AgenaAstro.com
Apr 29, 2008Great product...lots of uses!
Pros:Inexpensive! Does its job well! Doesn't need improvement!
Cons:None
Comments:For what it was intended, this 25mm spacer simply does its job and does it well. When used with the GSO 0.5x focal reducer in combination with an eyepiece or with a camera (webcam, video, etc.), it further deceases the effective focal ratio of the optical system.
Bottom Line: Would you recommend this item? Yes
However, there are some other potential uses for this little accessory. I use mine attached to a LCL-902K CCD video camera with a 1/2" Sony CCD chip. The extension tube alone can be used with the camera to provide a convenient "nosepiece" for the camera to attach to a 1 1/4" focuser.
It can also be used with the focal reducer at the front or the back of the Extension Tube. In other words, I can attach the focal reducer to the camera, and then use the tube as a "nosepiece". However, I can also attach the Extension Tube directly to the camera to function as both an extension tube and a nose piece and attach the focal reducer to the front of the combination.
If you are modifying a webcam for astro use, it can perform the same functions as both an extension tube with the focal reducer or as a nosepiece for the camera.
What else can be said? It does what it was designed to do. It is inexpensive and lends itself to a number of combinations for astro imaging. I really can't see where it could be improved upon!Sort by
