Nope... the mandrills produce a fully polished/figured optic. Up to fifty of
them between cleanings, then you can run off another batch with the same
mandrill!

Paul

--- http://www.astro-nut.com ---

"Mike Maxwell" wrote in message
...

Astro-nut wrote:
In his 2001 presentation at Stellafane, Dr. Peter Chen shared the
results of the technology at that time. He was then working on a 52"
primary that weighed in at 27 pounds. Up to 50 mirrors could be made
between cleanings of the precision mandrils:

I presume the mandrils give you a mirror that is roughly the right shape,
then you have to figure it? They can't give you an accurate figure
without post-processing, can they?

Mike Maxwell