This post is also available in: 日本語 (Japanese)
The rainy season doesn’t clear up and I can’t watch the stars. So, I am remodeling the C14 fan I made earlier. It’s been more than ten years since I removed the primary mirror from the cylinder.
The back side of this ingot mirror is amazing, and the rib structure is well made. The center of the mirror is thick, the edges are thin, and the structure with less distortion is perfect!