I thought today I would DPAC my Brandt shown previously.
I wanted to confirm my Williy-Nilliy spacer thickness change I made years ago.
Back then I just Kept replacing the spacers until the scope would take extreme high
Today, rather than fly by the seat of my pants I have radar.
It looks as though I nailed the spacer thickness back then, nice straight lines with
a hint of outward bowing. This may be my 80deg upstairs because its outward
on the other side of focus too. Or it may be my apparatus is not all on axis.
I knew it must be close because of the way the scope performs.
Strangely though I think I might have a tiny zone in the middle, you can see the
central line(s) aren't the same thickness near the center, kinda get lumpy like a
ant body, hmm.
As you know DPAC is very sensitive, and it doesn't lie, and it doesn't have good days
or bad days. There is something in the center.
Because the telescope is so long I used my camera adapter as a stage for
holding my tester, worked fine. And just set the 6 inch flat centered in front of the
Edited by clamchip, 27 June 2020 - 06:43 PM.