My 1973 'Olympus Manual for Zuiko Interchangeable Lens Group' it clearly states
for the 85/f2 (6 elements in 4 groups - the original) that it has 'A built-in
automatic correction mechanism for aberrations at close focusing distances'.
Roger Key, Copenhagen
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
>From: "Globtroter" <zbturon@xxxxxxxxxxxxx>
>Reply-To: olympus@xxxxxxxxxxxxxxx
>To: <olympus@xxxxxxxxxxxxxxx>
>Subject: [OM] opinions of short Olympus teles
>Date: Wed, 25 Jul 2001 20:56:12 +0200
>
>Hi, All!
>According my latest sources on Zuiko
>lenses, these ones are WITH floating
>element design:
>18/3,5
>21/2,0
>24/2,0
>28/2,0
>90/2,0
>100/2,0
>
>So, All the rest is of a "plain" construction,
>among them:
>16/3,5
>21/3,5
>24, 28 and 35/2,8
>35/2,0 - as well,
>50/3,5; 2,0; 1,8; 1,4; 1,2
>and so on.....
>and finally 85/2,0 is without floating element design.
>I have serious doughts if 85/2,0 has ever had the mechanism,
>it is quite simple and cheap lens like 35/2,0.
>
>Best photos anyway,
>Zbigniew Turon
>(Zuiko 85/2,0 owner)
>
>
>
>
>
>
>
>
>
>..................................
> > Gary, my 85/2 sn 105406 (pretty early) doesn't seem to
> > have a floating element.
>.......................
> > Warren
< 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 >
|