I took both pictures with the 9mm 50x eyepiece. For the second I just used the zoom of the iPhone camera app. Even for the first picture I used some zoom.
This is my calculation: The true field of view of the 50x eyepiece is 1.33 degrees. The moon is about 0.5 degrees. And the apparent field of view is 67 degrees. So the moon has an apparent size of about 25 degrees in the eyepiece.
I am attaching a list with the specs of the eyepieces, which I partly took from the Kowa website, partly wrote myself. (I measured the weight and supplemented the Info about the iPhone adapters.)
I looked at the the moon also with the 32x standard eyepiece and found the image too small. The 50x is fine. However, I wouldn't be able to show a photo saying: "This was the size of the moon in the eyepiece." Comparing views and photographs depends so much on how you look at the photo. What can be said though is that the moon should with the 50x eyepiece appear roughly 1.56 times larger than with the 32x eyepiece.
But I certainly would like to look at the moon with more magnification than 50x, say with 75x or even 100x. The Highlander can easily handle that, I think.
Well, I do hope all of my considerations and calculations are correct. Looking forward to some comments.