When a new part came out, like going from center weighted curtains to
averaging, they (the new parts) would come with a directive to return old
version of the part to Tokyo or destroy them. Either way, factory service
centers were supposed to stop using them.
The only customer we saved center weighted curtains for was National
Geographic.
John Hermanson
___________________________________
Camtech, Olympus Service since 1977.
21 South Lane, Huntington NY 11743-4714
631-424-2121 http://www.zuiko.com
Free Olympus Manuals: 1-800-221-3000
___________________________________
----- Original Message -----
From: <clintonr@xxxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Tuesday, October 31, 2000 12:23 AM
Subject: Re: [OM] OM 2 question
| Olympus never differentiated the OM-2 curtains with the original pattern
| and the later pattern with a separate part number - once stock of the
| old style curtains were used up, the new type curtains were installed as
| needed during repairs without qualm. In other words, they were used
| interchangeably.
|
| Also, there was no change in the main circuit - no different part
| number. The SBC's on the circuit were the same by all appearances,
| whichever style curtain was installed.
|
| What prompted the alteration of the "random pattern" was never explained
| - but I would suspect that it was because, (a) the effect on the
| exposure was so minute that the "center weighted" pattern was deemed
| unnecessary, and (b) the "average" pattern was cheaper to make. 8^)
|
|
|
| Chip Stratton wrote:
| >
| > This is quite plausible, but it may also be that they replaced the
silicon
| > cell sensor with one whose 'field of view' was more centrally focused,
thus
| > a center-weighting to the actual curtain pattern was no longer necessary
to
| > give center-weighted metering.
| >
| > They did continue to advertise center-weighted metering even after the
| > switch, didn't they?
| >
| > Chip Stratton
| > cstrat@xxxxxxxxx
| >
| > > I can't think of any other reason other than Olympus decided that
| > > the majority of photographs were better served by the 2nd,
| > > less-center-weighted metering pattern. It also may have produced
| > > a better match between the OTF metering (via the shutter curtain
| > > pattern), and the in-finder metering.
| > >
| >
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|
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|
|
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