I made the mistake of looking through a friend's Megrez 90 again after I wrote that post, and I'm feeling hard pressed to not spend my money on one of those now ...
Where's there a 150mm f5 Petzval for $1100 though?
And yeah, I think I was wrong about the second lens group being just another positive doublet, I think the whole point is that it's negative. Oh well, it was an idea.
- Mike