[mch62 (Mark)]

Hi Dan , I should think that the Williams will be capable of 60x per inch on a night of good seeing.186x
That's the trick getting a night of good seeing with stable air.
My cheaper (Chinese) Celestron 80mm ED doublet is quite often able to go to 192x with a UO 12.5mm ortho and 4x powermate.
Can you take an AVi of the star test and extract some frames to post so we can see what they look like.
Also one of Sirius would be nice to compare chromatic colour at high powers.
I note your in Brisbane, you should come along with all the Brisbane guys for a night at my place in the Lockyer valley.
About 6-7 of us do regular get together and I have nice dark sky's within 3/4hr from Brissy.
PM me your e-mail address and I will let you know the next night if your interested.

I am curious as to the colour correction of the WO triplet and have included a frame of Sirius at 192x. a bit over 60x / inch from my doublet.
A blue haze is visible around the star but from the Achromatic refractors I have had in the past both long and short focal ratios it is vastly superior and images snap to a focus.

Any one with other ED and semi-ed able to post a similar pic for comparisons of color corrections?

Mark

P.S. Dan if your unsure of the star test bring your scope out and I will check it for you.
We can throw the ToUcam in if you don't have one and get some frames to analyze.

Mark