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A Rock-Solid Foundation for Your 4-Inch Refractor
The Tele Vue 4" Ring Mount provides an uncompromisingly stable platform for your premium 4-inch refractor, ensuring your instrument is perfectly balanced and securely attached to its mount. Engineered from solid, machined aluminum with a durable satin finish, this mounting system is designed to integrate seamlessly with Tele Vue's finest optical tubes, including the TV-102 and NP101 models. It is the correct choice for observers and imagers who need a rigid, reliable connection that eliminates flexure and preserves optical alignment.
The Hinged Clamshell Ring Design
Unlike simple, solid rings that require you to slide the telescope through, the Tele Vue 4" Ring Mount features a hinged, clamshell design. This allows you to open the rings completely, place your optical tube assembly directly into the cradle, and then securely clamp it shut with the large, knurled locking knobs. The benefit is a much safer and easier installation process, especially in the dark or when wearing gloves, eliminating the risk of scratching your OTA's finish.
This design also ensures an even, distributed pressure around the circumference of the tube. This is critical for high-magnification planetary viewing or long-exposure astrophotography, where any mechanical stress on the optical tube could induce astigmatism or other aberrations. The rigidity of the system ensures that once locked down, your telescope stays precisely where you put it, with no shift during focusing or tracking.
Precision Felt Lining for a Secure Grip
The interior of each ring is lined with a high-quality felt material. This serves a dual purpose: it protects the telescope's delicate finish from scuffs and scratches, and it provides a high-friction surface for a slip-free grip. The felt compresses slightly to conform to your optical tube, dampening minor vibrations and ensuring the telescope cannot rotate within the rings once the clamps are tightened.
This protective layer is essential for maintaining the resale value and pristine condition of a premium instrument. It allows you to achieve a firm, secure hold without having to overtighten the locking knobs, reducing the risk of tube compression or mechanical stress. The result is peace of mind, knowing your investment is both secure and protected.
Versatile Mounting Base and Accessory Platform
The base of the ring mount is a solid block of aluminum with a hole pattern specifically designed for Tele Vue's own mounts, like the Gibraltar HD and Tele-Pod. It also includes mounting holes on a 35mm spacing, which allows for direct attachment to Vixen-style dovetail plates for use with a wide range of equatorial mounts. This integrated versatility means you likely will not need additional adapters to get the rings onto your preferred mount.
Furthermore, the top of each ring features a flat platform with standard 1/4"-20 threaded holes. This transforms the rings from a simple mounting device into an accessory hub. You can easily attach a Tele Vue Starbeam or Sol-Searcher finder, a mount handle for easy carrying, or a piggyback adapter for wide-field astrophotography with a DSLR camera, expanding the utility of your setup.
An Honest Assessment of Weight and Balance
One trade-off for this level of stability is mass. Machined from solid aluminum, the Tele Vue 4" Ring Mount is significantly heavier than lightweight, cast-aluminum alternatives. While this mass contributes to its vibration-damping properties, it also adds to the total payload your mount must carry. Observers using lighter-duty mounts should account for this additional weight when assessing their total payload capacity.
However, for the intended telescopes like the NP101is, this weight is a feature, not a bug. It provides a low center of gravity and the necessary rigidity to support imaging equipment without flexure. It is an engineered choice for performance, prioritizing stability over minimal weight for observers who demand the most from their equipment.
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Will the Tele Vue 4" Ring Mount fit my non-Tele Vue telescope?
These rings are designed for optical tubes with a true 4-inch (101.6mm) outer diameter. If your telescope from another brand has this exact diameter, it should fit securely. Measure your tube's diameter carefully before purchasing.
How do I attach these rings to a Vixen or Losmandy dovetail?
The base of the rings has threaded holes with a 35mm spacing that allows you to bolt them directly to most Vixen-style dovetail plates. For Losmandy-style plates, you will typically need to use a Vixen-to-Losmandy adapter plate or ensure your Losmandy plate has the correct passthrough holes.
Can I slide the telescope for balancing with these rings?
Yes. The clamshell design allows you to slightly loosen the locking knobs and carefully slide the optical tube forward or backward to achieve perfect balance. The felt lining provides enough friction to prevent the tube from slipping unexpectedly during adjustment.
What accessories can I mount on top of the rings?
The 1/4"-20 threaded holes on top of the rings are standard for many astronomical accessories. You can attach Tele Vue's Starbeam finder, a carry handle, or a universal piggyback camera mount for a DSLR.
Are these rings better than the sliding bar that comes with some Tele Vue scopes?
The sliding bar is designed for fast balancing on Tele Vue's alt-azimuth mounts. These rings provide a more rigid, secure connection with two points of contact, which is generally preferred for astrophotography or when using heavier accessory loads, as it minimizes potential flexure.
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| Model |
RS4-8004 |
| Compatible OTA Diameter |
4" (101.6mm) |
| Material |
Machined Aluminum |
| Finish |
Satin |
| Lining |
Felt |
| Accessory Mounting |
1/4"-20 threaded holes |
| Weight |
2.4 lbs (1.09 kg) |
| Compatibility |
Tele Vue TV-102, NP101, NP101is |
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Tele Vue 4" Ring Mount Assembly
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Tele Vue 5-Year Limited Warranty
