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[OM] Re: Electronic shutters, was : Media Release: New Canon EOS 40D Del

Subject: [OM] Re: Electronic shutters, was : Media Release: New Canon EOS 40D Delivers Speed, Control an...
From: "Piers Hemy" <piers@xxxxxxxx>
Date: Wed, 22 Aug 2007 14:35:30 +0100
Can't add to what you say here, Chuck, but can add to your earlier message -
I have A1 images perfectly synced with a T32 at 1/2000 sec. and 1/3200 sec.
Don't know why not at 1/4000 sec. - maybe no reason.  

--
Piers

-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Chuck Norcutt
Sent: 22 August 2007 14:11
To: olympus@xxxxxxxxxx
Subject: [OM] Electronic shutters, was : Media Release: New Canon EOS 40D
Delivers Speed, Control an...

No, the high speed is not due to small mechanicals but rather the
"electronic" shutter.  But that requires an interline transfer sensor (ala
point & shoots) rather than a full frame sensor and DSLR's do not now use
interline sensors.  As I understand it, interline sensors have less total
surface area devoted to actually catching photons because of then need to
place componentry on the front surface.  But something analogous has to be
going on with live view so maybe DSLR's will eventually move to an interline
form of sensor.

"Full frame" as used here has nothing to do with the size of the frame. 
  See this Kodak page for a definition of the differences and use of
electronic shutters on interline sensors.
<http://www.kodak.com/US/en/dpq/site/SENSORS/name/ISSProductFamiliesRoot_pro
duct>

The part I have not yet understood on the Mynolta A1 is the actual interplay
between the mechanical and electronic shutters.  The only thing that's clear
to me is that the mechanical shutter must obviously be opened before the
electronic shutter can do anything at all.

Chuck Norcutt


Moose wrote:
>
>>   
> Sure, except where the above techniques are used.
>> Eventually, we may see DSLR's with electronic shutter control like 
>> the Mynolta A1 which uses both mechanical and electronic shutters.  I 
>> don't know how they work together but the Mynolta basically has 
>> unlimited flash sync speed.  I've never tested it beyond 1/1000 but 
>> it certainly works up to that speed.
> Tiny sensor, lens and shutter(s), compared to 645. Size, weight, 
> inertia are way bigger;
> 
> Moose

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