Archived posting to the Leica Users Group, 2003/02/23

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Subject: Re: [Leica] RE: Longevity of Leica products
From: Dennis Painter <dennis@hale-pohaku.com>
Date: Sun, 23 Feb 2003 08:18:30 -0800
References: <NABBLIJOIFAICKBIEPJJMEHOEGAB.darkroom@ix.netcom.com>

Austin Franklin wrote:

> > To control the shutter in the M7, you need to have ( in this day
> > and age) a
> > uP.. it may be not too fancy, but it is  in there some place.....
>
> Not really.  It's best done with logic, IMO.  But a micro in even the
> smallest FPGA is trivial.
>
> Controlling the shutter is merely a clock input, shutter speed input, first
> curtain release output, second curtain release output, shutter button input.
> All it takes is a counter.  The shutter speed input can come from the
> shutter button, or the AE circuitry.
>
> BTW, that brings something up...is the shutter on the M7 completely
> electronic?  If so, then does the shutter button do anything mechanical, or
> is it a "soft" button, like on other electronic cameras?
>
> Regards,
>
> Austin

Austin,

I don't know but they have the 2 mechanical speeds that work w/o the battery so
I think it's mechanically actuated and timing controlled by electronics.

Dennis

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In reply to: Message from "Austin Franklin" <darkroom@ix.netcom.com> (RE: [Leica] RE: Longevity of Leica products)