Steve, I've shot with RR lenses. A
word of warning: Do not assume,
by the examples mentioned here and
the age of the design, that you will
get "period" looking negatives from
the lens. My experience is that the
RR lenses render amazingly well,
and that you have to go farther back
in lens designs -- the Petzvals and
beyond -- to get the sort of optical
irregularities that one associates
with very old photographs. When
I shot with RRs, I would have been
hard-pressed to distinguish their
work from the negatives I made
with modern Tessar-design lenses.