Drove about 2 hrs Sunday to meet the seller and picked up a Parallax 10" F5 Newt with an Ed Stevens primary. I heard good things about his work, supposedly if you ordered one of the smaller Zambuto mirrors 14" and smaller that Ed was who did the figuring. It came with a really nice printed booklet with all the mirror test results and charts in it. Sadly my ignorence of such things leaves me wondering what I am looking at.....Could use some help interpreting what I am looking at.
RTA: .14 (not familar with this term but the booklet calls it "Relative Transverse Aberation")
Strehl Ratio: .999 (I know this is good but I also know there are several methods used to arrive at this with some being more accurate than others. It does describe it as "the wavefront for the entire mirror is averaged using the amplitude error for all of the zones")
Peak to valley wave: Less than 1/20
There are a couple of other specs that I dont grasp either.
P-V Wavefront 1/.. : 75.75
Wavefront RMS 1/.. : 223.46
Of course the weather wont permit me to physically evaluate it as usual when I get a new scope so here I am trying to educate myself on what I am looking at