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Re: [OM] Olympus Auto-Exposure VS. Other brands

Subject: Re: [OM] Olympus Auto-Exposure VS. Other brands
From: John Hermanson <omtech@xxxxxxxxx>
Date: Mon, 10 Aug 1998 09:33:35 -0400
The OM-10 & 20 do not have air dampers on the mirror mechs.

John

Stuart Goggin wrote:

>
>
> In regards to the OM 20 shutter noise,   I too have noticed that my OM 20 is
> very noisy.   It appears that the mirror slaps really badly as it is moved
> back to its resting position.    In fact the vibration as this happens is
> very noticable too.    I always thought that it was just a bad example that
> I bought,  but have heard similar "explosions" from other OM 20's.
>
> My OM 10's in comparison are much smoother.  The OM 1n is much much smoother
> and you can hardly feel the shutter being fired.   The OM 2000 is also
> fairly quiet, probably as good as the OM 10's.
>
> Surprising, I thought the 20 was an upgrade of the 10.    Maybe I have just
> seen the noisiest of them....
>
> Regards
> Stuart Goggin
>
>
>
>
>
>
>
>                                                   
> ------------------------------------------------------------------------
>
> Subject: Re: [OM] Olympus Auto-Exposure VS. Other brands
> Date: 29 Jul 98 22:13:58
> From: Pauls0627@xxxxxxx
> Reply-To: OO2UNIX.AU.ORACLE.COM:olympus@xxxxxxxxxxxxxxx
> To: olympus@xxxxxxxxxxxxxxx
>
> In a message dated 7/29/98 3:42:56 AM Eastern Daylight Time,
> mike_tan@xxxxxxxxxxx writes:
>
> << 1. How is Olympus SLR AE different when compared to say Nikon or Canon
>  AE?  Don't the others measure exposure off the film then control shutter
>  speed?>>
>
> No, only Olympus and Pentax (with the LX, not sure about other models) use
> OTF
> metering for normal, non-flash, auto exposure
>
>  <<2. If it's off the film, why is the shutter curtain painted with a
>  black/white pattern?  Does an Oly measure off the curtain(after mirror
>  flip but before shutter opens) or off the film(during exposure)?>>
>
> Since the exposure time will frequently be determined before the 1st curtain
> fully opens, the curtain has a pattern which approximates the reflectivity of
> film. As the exposure time increases, more and more of the reading will be
> made off the film. Short exposures are measured mostly off of the curtain.
> All
> exposures faster than X-synch (1/60) will be made at least partly off of the
> curtain.
>
>  <>
>
> Most modern SLRs now do flash exposure measurement off the film. Usually this
> is for flash only, though.
>
>  <<3.) The shooting action noise caused by the shutter and mirror flip of
>  my OM20 is much louder than that of an OM2n(my Dad's).  Is this normal?
>  I find the OM2 to be very quiet in shooting. >>
>
> Simply put, the OM-2n is a more expensive, better made camera, oriented more
> to the professional market (as were/are all of the single-digit OMs). It
> should be quieter! I'm not sure what you mean by "much louder". I've never
> heard an OM-20 myself, but if it sounds REALLY bad you may want to have it
> checked out.
>
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