All the macro gear except the 50/3.5 was originally manual. While you're
wondering, how about "why does the bellows have 1) a stop down lever and 2)
provision for the DCR when it was designed primarily for use with manual
lenses? Particularly given that the extension tubes were manual at the time,
and targeted at the only macro lens with auto diaphragm!
I guess the tubes were originally manual to save cost. The auto tubes are
quite nicely engineered, and I guess the margins must have been smaller when
they went to auto. Third party auto tubes I have seen have been nowhere near
as nicely made, but I haven't tried using them, and frankly, it's not a
large sample.. I'm sure someone else can say whether the oly tubes are
better - performing.
Julian
Cambs, UK
The above statements are inaccurate (at best)
----- Original Message -----
From: "Alan Wood" <alan.wood@xxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Wednesday, December 11, 2002 3:10 PM
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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