Re: [ATM] Folded Stevick-Paul

["Mel Bartels" <mbartels@bbastrodesigns.com>]

> At f/15, am I being over optimistic in expecting to be able to remove
> *all*
> traces of ripple or are even tiny errors just made glaringly obvious at
> f/15? Should I go back and continue working them until they are sensibly
> perfect or be happy and get on with life? This is intended to be a
> high-contrast planetary scope after all.

The secret is temperature and moisture control, more so than polishing
compound.  We humans have a tendency to focus on the obvious (polishing
compound) and gloss over the true forces involved.  Really, professional
quality cerium oxide diluted (ideally milled) will work nearly as well
without any of the mess.  You will have to create a work space that you can
stabilize temperature and relative humidity.

Mel Bartels


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