PrimaLuceLab PLUS Support Rings

No, these rings are specifically engineered for optical tubes with a diameter between 120mm and 130mm. Using them with telescopes outside this range will prevent a secure fit and compromise the stability required for imaging.

The split-ring design allows you to open the rings completely, meaning you can install them without needing to slide them over the end of the telescope tube. This makes mounting much faster and safer, especially when working with larger, heavier refractors.

Yes, the rings feature integrated mounting holes on both the top and bottom surfaces. This allows you to easily attach guide rings, dovetail clamps, or additional accessories directly to the support rings without needing extra adapters.

The PLUS system is a proprietary mechanical standard designed by PrimaLuceLab to ensure all components—rings, plates, and clamps—fit together with high precision. This creates a rigid, unified structure that minimizes flexure, which is critical for maintaining alignment during long-exposure astrophotography.

The rings are designed to bolt directly onto most standard dovetail bars using the provided mounting holes. However, ensure your dovetail bar has the appropriate hole spacing to match the rings before installation.