Re the 85/2 and its design:
http://www.datasync.com/~farrar/zuiko.html#tele says the 85/2 MC has
the Floating Element correction.
The eSIF at http://www.taiga.ca/~esif/om-sif/lensgroup/85mmf2.htm
says of the 85/2: "It incorporates a floating element group for the
first time in the world for a telephoto, ensuring superior image
quality even at close distances."
An OM System Brochure from January 1987 lists the following lenses
as having "automatic correction mechanism agains close distance
abberations"
18/3,5
21/2,0
24/2,0
28/2,0
50/2 Macro
50/3.5 Macro
85/2
100/2,0
(The 90/2 Macro is not listed as having this mechanism.)
So my vote would be that the 85/2 DOES HAVE the floating element, at
least in MC guise. I don't have an early Zuiko brochure in front of
me, could someone check an early 80's brochure for the same sort of
language?
The surprise to me is that the vaunted 90/2 Macro doesn't have the
floating element correction. Perhaps it's corrected for close-up
distances already? So it doesn't need the FE? But why would the
two 50 Macro lenses need such a device? Are 50's corrected more for
infinity, even in the case of the Macro lenses?
Skip
The 1984 OM System Lens Handbook indicates that it has the floating
lens element.
--
Winsor Crosby
Long Beach, California, USA
mailto:wincros@xxxxxxxxxxx
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|