I've been admiring a great many collodion images documenting the civil war and I've noticed a particular lens characteristic that I absolutely love. I am dying to know the type(s) of lens that characterictically exhibits this look.
What I'm looking for is a sort of rendition that looks like the image edges look like they are smeared in concentric circles aorund the center, with the center still sharp. I found an example, even if it's not an old photo (it's by Robert Szabo):
Does anyone have information on the type or types of lenses that will tend to show this "flaw?"