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PostPosted: Mon Sep 24, 2007 6:57 am 

Joined: Wed May 23, 2007 8:38 am
Posts: 357
Hi Gordon,

In a recent video you demonstrate the silent shooting capability of 40D, however I didn't quite understand what you meant by "Electronic First Curtain" could you explain a little bit more?

Thank you.

P.S. I really enjoyed the "Canon EOS 40D Live View and astro-photography" video. Are you going to post any of the shots of the moon & Jupiter from this video to the forum?

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PostPosted: Mon Sep 24, 2007 8:48 am 
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Joined: Tue Nov 08, 2005 3:32 pm
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Location: Queenstown, New Zealand
An electronic curtain literally means switching the sensor on and off to take the image instead of physically opening and closing a mechanical shutter in front of it. It's how most compact, non-DSLR cameras work.

Now I'm not sure of the exact implementation on the 40D, but basically by bypassing the traditional physical process - or at least some of it - the camera can take photos more quietly... so the first curtain is used to take the shot, but there still needs to be a refresh of the system - the second curtain - and that's what you can hear when you lift your finger from the shutter release in this mode.

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