Mark,
I subscribed to this list, and There you were providing an effective
answer to the subject matter.
The only problem is I picked the daily update mode, so I get every
email sent to the list, my server
only allows so much space then it blocks me out, untill I delete some
emails.
This seems like the serious Olympus mail list, I am not a proffesional
photographer, so I will probably learn
quite a bit. Although exposure and framing to capture a photograph,
sort of comes natural to me, if you know
what I mean. Some of the great photographers, captured the image with
out a lot of technical contemplation,
they just felt the when and how, this is how I have always approached
photography. Of course with an understading
of exposure principles, but I keep the technical aspect in the back of
my mind, and focous on capturing the moment.
My next goal is to get into developing and printing. SO I have a
question, for now, are the automated developing
processes inferior to say sending a roll through a reputable camera
shop or lab?
On the lens, the tab you were refering to is ok, the one I mention is
another black tab, that is sort of "T" shaped
and is held down by two screws, it sits in proximity to the release
tab, towards the bottom side of the lens.
I may send you a photo.
Ed
-----Original Message-----
From: Mark Dapoz [mailto:md@xxxxxxxxxxxx]
Sent: Wednesday, June 12, 2002 11:13 PM
To: olympus@xxxxxxxxxxxxxxx
Subject: Re: [OM] OM 4 (Auto) - Shutter speeds
On Wed, 12 Jun 2002, Tom Trottier wrote:
> On Wednesday, June 12, 2002 at 17:05, Winsor Crosby
> > I would not be surprised if all exposure determination started
> > between the time that the shutter button is pushed and the point that
> > shutter curtain opens. It would explain the shutter lag with the OM2s
> > and OM4s compared with the manual cameras. That would explain why no
> > one notices auto exposure errors at 1/60 sec. with a film with out of
> > parameter reflectivity. So I don't think there is any need to worry.
>
> I'm sure it starts then, and when enough light is seen, the 2nd
> curtain starts closing. Since the film starts becoming visible and
> continues increasing in visible proportion throughout the measurement
> period, 1/60 would have 3/4 curtain and 1/4 film reflectivity
> measured. 1/30 would be half and half.
Exposure integration begins when the first curtain is released. There's
a nice flow chart and timing diagram on pages I-47 and I-48 of the OM-4
service manual that explains all this. Section I has all the gory details
of how exposures are arrived at in the OM-4.
-mark
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