I ran here recently to Australia. I look at the photo (on the left) unknown to me crap glows. I think it's interesting, what a thing from 1885. Give, I think I'll make it lighter, maybe something unusual will open. Made (center). And, of course, right there, to my own joyful applause, I discovered that someone had done the same thing a long time ago, only brighter, clearer and much cooler in all respects (right). Well, that's not the point.
Historians call this thing the refractory telescope. As I am from St. Petersburg, and there it is basically useless to look at the sky - you can't see anything. Clouds, clouds, precipitation and, in general, the general oppressed atmosphere of the heavenly dome. Aliens, if they want to land, must do it, it's only there. Nobody will notice.
In this regard, I have never been interested in telescopes. I only know that they look like half a pair of binoculars if you break it in the middle.
Gaps in telescopic education and the lack of stereotyped telescopic landscapes in my head allow me to assume that this is not a telescope. Although it is now in Australia trying to restore from the ashes of centuries, as a national pride.
In this regard, I have a request. If anyone knows the truth about this thing, even a telescopic one, be so kind as to direct the ray of your knowledge to accelerate my grayness and explain why he needs a mesh barrel pulled together by metal hoops dividing it into equal parts, on which it is fixed, which I would call an optical resonator of electromagnetic waves. And the muzzle of a string bag is very conducive to this, in my opinion.
Of course, I'll go now and see how a refractor telescope works, but for now, it reminds me more of a hyperboloid of a famous fictional engineer.