Blue Fireball Large 3.28" Celestron SCT Female Thread to 2" Small SCT Male Thread Adapter
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
IMPORTANT NOTE:
New version with slightly longer male and female SCT threads. Otherwise identical to item # C-12 which is now discontinued (first version).
Description/Uses:
- Adapter with Celestron's large 3.28" female SCT threads on one side and a standard 2" male small SCT thread on the other side
- Celestron's 9.25" EdgeHD and all 11" and 14" SCT/EdgeHD telescopes come with a similar adapter but we are offering this for those who might need a replacement
- Also features a short M48 female thread inside the large female SCT thread. This can be used to attach 2" filters inside the adapter on the telescope side.
Features:
- Precision machined, black anodized aluminum
- Large knurled grip pattern on the outside
Specifications:
- Weight = 2.8oz
- Total length = 21.5mm (0.85")
- Optical length (Total length - small male SCT thread length) = 12.5mm (0.49")
- Large female thread specification = 3.28"-16TPI
- Length of large female SCT thread (including unthreaded undercut) = 9mm (0.35")
- Small male SCT thread specification = 2"-24TPI
- Length of male SCT thread (including unthreaded undercut) = 9mm (0.35")
- M48 filter thread specification = M48x0.75
- Length of female M48 thread = 2mm (0.08")
- Clear aperture = 47mm (1.85")
- Maximum outside diameter = 92mm (3.62")
Other Information
- Country of Manufacture: China
IMPORTANT NOTE:
New version with slightly longer male and female SCT threads. Otherwise identical to item # C-12 which is now discontinued (first version).
Description/Uses:
- Adapter with Celestron's large 3.28" female SCT threads on one side and a standard 2" male small SCT thread on the other side
- Celestron's 9.25" EdgeHD and all 11" and 14" SCT/EdgeHD telescopes come with a similar adapter but we are offering this for those who might need a replacement
- Also features a short M48 female thread inside the large female SCT thread. This can be used to attach 2" filters inside the adapter on the telescope side.
Features:
- Precision machined, black anodized aluminum
- Large knurled grip pattern on the outside
Specifications:
- Weight = 2.8oz
- Total length = 21.5mm (0.85")
- Optical length (Total length - small male SCT thread length) = 12.5mm (0.49")
- Large female thread specification = 3.28"-16TPI
- Length of large female SCT thread (including unthreaded undercut) = 9mm (0.35")
- Small male SCT thread specification = 2"-24TPI
- Length of male SCT thread (including unthreaded undercut) = 9mm (0.35")
- M48 filter thread specification = M48x0.75
- Length of female M48 thread = 2mm (0.08")
- Clear aperture = 47mm (1.85")
- Maximum outside diameter = 92mm (3.62")
IMPORTANT NOTE:
New version with slightly longer male and female SCT threads. Otherwise identical to item # C-12 which is now discontinued (first version).
Description/Uses:
- Adapter with Celestron's large 3.28" female SCT threads on one side and a standard 2" male small SCT thread on the other side
- Celestron's 9.25" EdgeHD and all 11" and 14" SCT/EdgeHD telescopes come with a similar adapter but we are offering this for those who might need a replacement
- Also features a short M48 female thread inside the large female SCT thread. This can be used to attach 2" filters inside the adapter on the telescope side.
Features:
- Precision machined, black anodized aluminum
- Large knurled grip pattern on the outside
Specifications:
- Weight = 2.8oz
- Total length = 21.5mm (0.85")
- Optical length (Total length - small male SCT thread length) = 12.5mm (0.49")
- Large female thread specification = 3.28"-16TPI
- Length of large female SCT thread (including unthreaded undercut) = 9mm (0.35")
- Small male SCT thread specification = 2"-24TPI
- Length of male SCT thread (including unthreaded undercut) = 9mm (0.35")
- M48 filter thread specification = M48x0.75
- Length of female M48 thread = 2mm (0.08")
- Clear aperture = 47mm (1.85")
- Maximum outside diameter = 92mm (3.62")
Other Information
- Country of Manufacture: China
Blue Fireball Large 3.28" Celestron SCT Female Thread to 2" Small SCT Male Thread Adapter