On Wed, 31 Dec 2008 14:01:46 -0600, Rick Johnson
wrote:

I think the star images if from inside to outside of focus, left to
right, are an indication of severe over correction. Sutter has an
example in his book of 1.7 wave over correction that looks something
like your series.

It is hard to interpret the star test on an achromat unless you use
filters. Our correspondent didn't say whether he imaged through
filters.

Bud