Has anyone considered making their own optics for a telescope? Or has that practice disappeared?
The reason I ask is that I have built three and designed two of them. But that was more than 3 decades ago and the glass suppliers I used back then either don't exist now or else do not supply hobbyist quantities of various kinds of glass. So it doesn't seem possible to even attempt to make one's own eyepieces, these days. And I'm beginning to imagine that Willman-Bell is the only remaining supplier of bare reflector materials and even then, only if you want just the one or two offerings they have. I'm beginning to think that there is no longer much of a hobbyist practice, anymore, and that one has to be rich and/or extremely dedicated to the idea if they want to make one themselves. Used to be far more common and you could usually find someone nearby doing the same thing to work with. But perhaps I'm just away from the business for too long and need to hear from folks.
Jon