Sandwich parabolic mirrors on ebay.

[cotterless45]

Any thoughts on these, they seem to be the real deal, depending on import duty look considerably less expensive than homegrown ?

http://www.ebay.co.u...d=200874838498

Nick.

[DirkSteele]

Certainly the quote from a Sky and Telescope contributor makes them sound rather impressive....

"Last night I had “first light” with the 12.5” f/6 mirror that you recently supplied. It is truly a magnificent optic! Ronchi, knife-edge, and star tests were straight out of a textbook, and the image of Saturn was breathtaking. Despite the thin substrate, there is no hint of astigmatism. Frankly, when I purchased a Hubble Optics mirror on eBay, I was skeptical of the advertised wavefront quality. For the low price, it just seemed too good to be true. In the future, I will not hesitate to recommend your firm’s optics to friends and acquaintances. ......

Tom Dobbins

Contributing Editor, Sky & Telescope magazine (quoted by permission)"

[Ajohn]

CloudyNights seems to have a good opinion of them. They have a web site as well. The ebay items seem to be oddments. Search hubble optics mirrors and they should pop up in google. They would tempt me because of the lighter weight and the promise of simple mounting without the mirror distorting under it's own weight.

John

-