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Unlock Your Tele Vue Imaging System with 2" Accessories
The Tele Vue A2A-1107 2.4" Adapter for 2" Accessories is the essential component for connecting standard 2-inch diagonals, eyepieces, and accessories to your Tele Vue NP101is or NP127is telescope. This meticulously machined adapter provides a secure, non-marring connection, ensuring your optical train remains perfectly aligned while preserving precious back focus for imaging configurations.
A Rock-Solid Focuser Connection
This adapter features a large 2.4-inch female thread designed to mate directly and securely with the drawtube of Tele Vue's "is" series imaging system focusers. This robust, wide-diameter connection provides a significant advantage over standard 2-inch nosepieces by eliminating the potential for tilt or flexure. The result is a more rigid and reliable foundation for both heavy visual accessories and demanding imaging trains.
Barrel Protection with a Brass Clamp Ring
Inside the adapter, a soft brass clamp ring provides the actual grip on your 2-inch accessories. When you tighten the thumbscrews, this ring compresses evenly around the barrel of your eyepiece or diagonal. This mechanism prevents the deep scratches and gouges that can be caused by adapters where the steel thumbscrew makes direct contact, preserving the value and finish of your premium accessories.
Dual Thumbscrews for Secure Locking
Two large, knurled thumbscrews are positioned to apply balanced pressure to the internal brass clamp ring. This dual-screw design ensures that your accessory is held firmly and centered within the adapter. For heavy components like a 2-inch diagonal with a large eyepiece, or a full-frame camera setup, this provides an extra measure of security against rotation or slippage as the telescope moves across the sky.
Low Profile for Maximum Back Focus
Every millimeter of back focus is critical in an imaging setup, and the A2A-1107 is engineered with this reality in mind. Its low-profile design adds minimal optical length to your train, maximizing the available space for filter wheels, off-axis guiders, and other essential imaging components. This efficiency makes it the primary choice for observers who switch between visual observing and astrophotography with their NPis telescope.
Seamless Integration into the Tele Vue Ecosystem
This adapter is more than just a mechanical part; it is a key that unlocks the full versatility of your Tele Vue NPis telescope. It allows you to use the finest 2-inch accessories from any manufacturer, from wide-field eyepieces for sweeping views of the Milky Way to planetary cameras for high-magnification imaging. The precise machining ensures that the optical axis is maintained, a critical factor for achieving the sharp, field-wide performance these telescopes are known for.
Limitations and Best Use Case
While essential for using 2-inch accessories, this adapter is a dedicated component for Tele Vue's 2.4-inch imaging system focusers found on NPis models. It is not a universal adapter and will not fit standard SCT threads or other focuser types. It is the right choice specifically for NPis owners who need to integrate 2-inch diagonals, eyepieces, or imaging components that use a standard 2-inch nosepiece into their setup.
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Will this adapter fit my non-Tele Vue telescope?
No, this adapter is designed specifically for the 2.4-inch thread on Tele Vue NP101is and NP127is telescope focusers. It is not compatible with standard 2-inch focusers or Schmidt-Cassegrain threads.
Why use this adapter instead of a standard 2" visual back?
The A2A-1107's large 2.4-inch threaded connection provides a more rigid and secure attachment to the focuser drawtube, preventing tilt that can be an issue with slip-fit adapters, especially with heavy equipment.
Does the adapter prevent scratches on my eyepieces?
Yes. It uses an internal brass clamp ring that tightens around the accessory barrel. This prevents the steel thumbscrews from directly touching and marring the surface of your eyepieces or camera nosepieces.
Is this the right adapter for imaging with my NP101is?
This adapter is for connecting accessories that have a 2-inch barrel. For connecting Tele Vue's dedicated imaging system accessories like reducers or camera adapters, you will need the specific threaded components for that system.
How much back focus does this adapter use?
The A2A-1107 is designed to be very low profile to conserve as much back focus as possible. While the exact length is minimal, it's a critical component for enabling the use of 2-inch accessories on the "is" series telescopes.
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| Product Code |
A2A-1107 |
| Telescope Side Connection |
2.4" Female Thread |
| Accessory Side Connection |
2" Barrel Receptacle |
| Locking Mechanism |
Dual Thumbscrews with Brass Clamp Ring |
| Compatibility |
Tele Vue NP101is, NP127is, and other focusers with a 2.4" male thread |
| Material |
Black Anodized Aluminum, Brass |
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2.4" Adapter for 2" Accessories
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Tele Vue 5-Year Limited Warranty
