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The Yolo telescope is an unobstructed reflecting telescope that comes complete with a tilted primary mirror, secondary mirror, and a flat tertiary mirror. For any astronomer interested in making a variation on the more mainstream type of Yolo, the simplified Yolo may be the next project to give you a telescope with high contrast views and unobstructed performance. According to “Building A Simplified Yolo” in the January 2006 issue of Sky & Telescope magazine, the simplified Yolo needs to follow three basic rules:
1. Make sure the secondary and primary mirrors on the simplified Yolo have the same ROC or radius of curvature.
2. Tilt both the secondary and primary mirrors at the same angle.
3. Give equal spacing between the primary and secondary mirror as you do between the secondary mirror and the focal plane.
Amateur telescope making can be a very satisfying and rewarding hobby.