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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.
First collimating eyepiece I have bought but can say I fully trust this website and what that provide and that's because of this and the 200p dob I have bought, both top quality
First Light Optics LtdUnit 7 Budlake UnitsBudlake RoadMarsh Barton Trading EstateExeter, DevonEX2 8PY
Company No. 5892293VAT No. 907 2895 01
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