About this product
This collimating eyepiece is a combination of a sighting tube and Cheshire eyepiece. The sighting tube’s narrow field of view and crosshairs provide a centering reference for the telescope’s optical elements. A reflective target face (set at 45 degrees to the illuminating hole) makes it easier to collimate the primary mirror.
Consider also our Premium Cheshire Collimating Eyepiece.
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