ok, I got this lens today and it is indeed a Petzval design with 2 groups,
4 elements with the rear elements "spaced" with a ring. Only trouble is
there is NO provision for any stops. I do know that Darlot ( in the 1880's
at least ) made portrait lenses without provision for stops - but
those were advertised for Magic Lantern use. I also think I recall that
some very early Portrait Lenses didn't come with provisions for stops as they
were just meant to be used wide open.. so what do I have here, a Portrait lens
or a ML lens ?
Thanks
Dan
PS - ( there are no markings on it )
