>From: plp@xxxxxxxx
>Subject: [OM] 85/2: 5/4 or 6/5
>
>On Paul Farrar's excellent webpage concerning lenses at
>http://www.ametro.net/~farrar/zuiko.html, a note is made
>regarding the 85/2 of two variations: 5 elements & 4
>groups, and 6 elements & 5 groups. Did anyone here buy
>their 85/2 new and so have the technical sheet that lists
>whether their lens is 5/4 or 6/5? I want to know which
>is more recent, 5/4 or 6/5, so if you'll list the serial
>number like 123XXX, maybe I get figure this out.
>
>Pete
>
>From: "Julian Davies" <julian_davies@xxxxxxxxxxxxxx>
>Subject: Re: [OM] 85/2: 5/4 or 6/5
>
>The SC lenses are 6/4 (cemented 2&3 and 5&6. The MC lenses
are 5/4,
>cemented 5&6. The MC lenses are also longer and heavier.
>
>Julian
>
>From: plp@xxxxxxxx
>Subject: Re: [OM] 85/2: 5/4 or 6/5
>
>It seems as if we have a disagreement. Some believe that the
>earlier version was 6/4 and others believe it was 6/5. I think
>we need an expert. John or Clint, do you know the answer? Did
>the first version have one or two cemented pairs of elements?
>Does the current lens have a cemented pair of elements?
>
>Pete
>
>From: plp@xxxxxxxx
>Subject: Re: [OM] 85/2: 5/4 or 6/5
>
>I agree. That suggests that the original version was 6/4, then
>they swapped a cemented pair of elements for a single element,
>resulting in 5/4.
I'm afraid I added to the confusion with my first posting on the list.
Julian and Pete got it right with 6/4 versus 5/4. I had only looked
at the drawings and tried to find out which was the earlier design
and not realised that the earlier version had also 4 groups. So I
just repeated the (not existing) 6/5. A look in the tables would
have prevented that. Sorry about that.
I thought I had narrowed down the time of the design change by a
look in the different catalogues and it seemed to be somewhat
along 1981. As I had bought mine early in 1981 I believed it
must be one of the 6/4s and started looking for the technical
sheet. I did actually find it but to my surprise it said already
5/4. This technical sheet was however printed in 0979 so the
information in the Olympus (Europe) catalogues of both 1980
and 1981 must have been outdated already when going to print.
Seems I can't help with any serial number there.
And thanks for the welcome Winsor.
Reinhold
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