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02-26-2010, 04:57 PM   #1
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Long exposure camera noise

I have Shake reduction turned off when i'm taken long exposures on a tripod, but, During the shot while mirror is exposed, if i get my ear close to the camera, i can still hear some noise coming from the camera. Since shake reduction is turned off, i'm wondering what this is noise is all about.

02-26-2010, 09:10 PM   #2
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I'm not sure about it but the following sounds like a sensible explanation.

I think it is the SR mechanism. The sensor is free floating and still needs to be held in place; else it would go down to the bottom due to gravity. That might be the sound that you hear.
02-27-2010, 05:55 AM   #3

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You are correct, the SR voice coil motors holds the sensor in position even if SR isn't used.

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