Svbony SV197 Cheshire Collimator 1.25" telescope 📷

This Cheshire collimator makes aligning Newtonian reflectors more accurate and repeatable, with a long barrel that helps reach deeper into eyepiece holders and a view designed to reduce stray reflections. It simplifies the process of bringing mirrors into concentric alignment, so visual performance improves for planetary and deep sky observation.

Key Points

The tool presents a long tube that increases precision when collimating, especially useful for telescopes with recessed focuser tubes. It includes a sighting point to help centre the return images for more accurate adjustments. For durability, the transverse wire is made from steel wire crosshairs rather than softer metals that may deform or break, which gives a firmer reference when centring the optics. 🧭

The internal barrel is finished matt black to reduce internal reflections and improve contrast while aligning. A dust cap and a protective pouch are provided for storage and transport, which helps keep the unit clean between uses. Note that, according to the manufacturer, it is intended for Newtonian reflectors and may not be compatible with other focuser styles without an adapter.

Usage Recommendations

Insert the collimator into a 1.25 inch focuser and use the sighting point to place the primary and secondary reflections in the correct positions. Carry out coarse adjustments of the secondary first then refine the primary mirror alignment while checking the concentric rings and crosshair position. For best results, work in a stable setup with the telescope level and use small incremental tweaks to the mirror collimation screws. 🔭

Allow some time to familiarise yourself with the appearance of the Cheshire return pattern, as different reflectors can present small variations in the way reflections line up. Because the barrel is long, it will reach further into focusers than standard eyepieces, but very deep focusers or large cats may need additional adapters. Also consider that the accuracy of collimation depends on a steady hand and careful visual checks rather than automatic correction.

Technical Specifications

• Name: SVBONY SV197 Telescope Collimator
• Format: - 1.25 inch eyepiece barrel
• Material: - CNC aluminium alloy with matt black interior
• Crosshair: - Steel wire crosshairs
• Accessories: - Protective dust cap and storage pouch