Manufacturers & Suppliers of Astronomical Telescopes Since 1976
Choose the size that matches the outside diameter of your telescope tube. If OD of the telescope is a little smaller than ID of the rings that you can shim the inside of rings with extra felt.
Choose the size that matches the outside diameter of your telescope tube. If OD of the telescope is a little smaller than ID of the rings that you can shim the inside of rings with extra felt.