All the earliest Petzvals had more falloff towards the edges, due to a more curved field. They were fast, so that also brings in swirls, usually.
Here is a shot from my 6" (about 4.5" back focus) on halfplate. Your 8" lens will definately cover halfplate. I like CC Harrisons a lot.
And I just found a halfplate I took with my 8":
Edited 1 time(s). Last edit at 05/30/2012 05:25PM by goamules.