It does seem strange to introduce manual tubes at that time. When I bought
my OM-1 in 1974, I bought aftermarket, automatic tubes that I still have.
The Olympus tubes were about 2-3 times the generics, and they were manual.
Here's a PDF page from a March 1974 Ponder & Best brochure with a blurb and
picture of the manual tubes. They discuss both the 55/1.2 and 50/3.5 as
candidates for the extension tubes. I don't think that the three manual
macro lenses (20, 35, 80) were considered candidates for extension tube use.
http://www.skipwilliams.adahost.com/data/p16-from-om-system-p&b-0374.pdf
Skip
Original Message:
-----------------
From: Alan Wood alan.wood@xxxxxxxxxxxxx
Date: Wed, 11 Dec 2002 15:10:57 -0000
To: olympus@xxxxxxxxxxxxxxx
Subject: RE: [OM] Introduction dates of macro equipment
Skip Williams wrote:
> I know that the Extension Tubes were available with the OM-1 in 1972?
> Were
> they originally manual, stop-down-metering tubes?
>
Yes, the first OM tubes were manual, not automatic. I would like to find
out when the automatic tubes were introduced.
I would also be interested to know why Olympus produced manual extension
tubes for the OM, when all of the lenses had automatic diaphragms (except
the original 20, 38 and 80 mm bellows macro lenses, which were not likely to
be used with extension tubes).
Alan Wood
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