[pure-silver] Re: old rollei over exposing
- From: "Gene Johnson" <genej2@xxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 18 Feb 2005 06:07:05 -0800
I've worked on a lot of old Compurs. I don't see where leaving them cocked
is going to hurt anything. They used proper springs in these shutters and
they don't lose their tension much as far as I can tell. I have some 70+
year old compurs that have been used hard and still hum just fine. Gotta
believe they've been left cocked a few times. A real spring isn't supposed
to"set".
----- Original Message -----
From: "Michael Healy" <emjayhealy@xxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Thursday, February 17, 2005 10:59 PM
Subject: [pure-silver] Re: old rollei over exposing
> Now wait a minute. Wait a MINUTE. Either we need to keep our shutters
cocked for 40
> years, or we absolutely should never cock them ever until we're ready to
fire them. I
> hope you will excuse my ignorance and especially my exasperation; but I'm
unable to
> see a whole lot of wiggle room on this issue. Could be I'm the last
person on the planet
> who doesn't know what EVERYBODY already knows about lenses. Could be. But
listen,
> you guys started this. So please, educate us. Offer us something a tad
more substantive
> than "he said, I said."
>
> The truth is, I'd never heard either of these assertions. Common sense
says, don't leave
> it cocked, as in, don't leave the engine running. Then again, common sense
says of a
> manual transmission, park it in first, don't leave it in neutral. So
what's common sense in
> this case? One of you guys has to be absolutely flatout categorically
wrong. So please,
> allow me to begin with a simple question: You make a claim: the experts
all say, or the
> manufacturers all agree. Okay, WHAT manufucturers generally recommend?
Point us to
> a source or three. Show us they recommend leaving it cocked, or show us
they
> recommend NOT leaving it cocked. I don't care. If you are going to make an
assertion of
> this sort, or refute it, could you please bother us with something a bit
more substantial?
> For a user of LF lenses, this is neither a trivial matter nor something to
decide on the
> basis of whether it's Jerry or Richard who seems to be right more often.
>
> Mike Healy
>
>
> On 18 Feb 2005 at 15:59, Richard Urmonas wrote:
>
> Date sent: Fri, 18 Feb 2005 15:59:00 +101800
> From: Richard Urmonas <rurmonas@xxxxxxxxxx>
> To: pure-silver@xxxxxxxxxxxxx
> Subject: [pure-silver] Re: old rollei over exposing
> Send reply to: pure-silver@xxxxxxxxxxxxx
>
> > Quoting "Koch, Gerald" <gkoch02@xxxxxxxxxx>:
> >
> > > It
> > > is extremely important not to leave a shutter cocked for long
> > > periods of time.
> >
> > The manufacturers of the older leaf shutters generally recommend
> > the shutter be left cocked. From a mechanical point of view, the
> > cocked state will result in less chance of the shutter misbehaving
> > (going sticky) as the driving spring is much stronger than the return
> > spring, so there is more force available to 'break free' any sticky
> > parts.
> >
> > Richard
> > --
> > Richard Urmonas
>
>
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