The perfect guide rings.
To fix an instrument in parallel with a telescope, and more generally with a telescope, we offer with the Kepler brand this pair of collars 125mm in diameter (perfect maximum interior diameter up to a telescope of 102mm). Each collar is fixed on a plate: a female dovetail in Losmandy format (4").
The assembly is therefore easily fixed in parallel with a Schmidt-Cassegrain type telescope, on a male dovetail positioned on the upper part of the tube. Each element (necklace + support) being independent, you can adjust the gap between them according to the length of your secondary instrument. Adjustment screws on the collars allow the orientation of the instrument to be adjusted by several degrees.
Solid aluminum construction, CNC machining (numerical control machine) for a neat finish. Included: large sliding bracket clamping handles.