Friday, October 18, 2024

First Foucault Image




It took two nights to get this image. This is about 5-6 hours of polishing of the 6 inch f/4.79 mirror. I started this like 7 years ago. There’s some surface roughness and I’m planning on switching to either red rouge or high quality cerium oxide for figuring.  My knife edge is coming from the left side in a janky way. There also a kind of hole?  I think. 

Occasionally, I would see astigmatism but there's about 1.5 to 2 inches of vertical distance between the light and camera.  So that could be test stand astigmatism.  I probably should do 2-3 hours of general polishing next with the new polishing agent.

Saturday, October 5, 2024

More Anti Asian Bashing from CloudyNights and the mods don't care

 

This 'bobhen' guy loves to spout anti-Asian hate and most of these "boomers" suck themselves in celebration.  Except for the lone Australian dude who gets very little support but is often pointing out the obvious contradiction in bobhen's "points" when he starts to articulate his racist ideas.