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 Post subject: Canon S100 video noise
PostPosted: Sat Jan 12, 2013 3:49 am 
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Location: Sydney, Australia
This may have been previously discussed, but my S100 has unwelcome "woodpecker" noise when shooting video under quiet conditions. I sent my camera back to Canon and they reckon it is within specs. But a Google search reveals that other owners have also noticed the noise. Apparently the problem is with the autofocus and can be solved by using manual focus - but who wants to be bothered doing that? I wonder whether the S110 is any better?


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PostPosted: Sat Jan 12, 2013 2:24 pm 
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Well first of all, the S100's sensor is pretty small, larger than most compacts, but still small, so the noise is actually not that strange, that's why Canon says it's within specs. Also, when shooting video, in what conditions are you shooting? As far as I'm concerned, your S100 doesn't have manual ISO for movies, and probably it's setting it automatically to high ISOs. Try shooting in full daylight and see if the noise persists.
By the way, I highly doubt that using MF will help at all, the noise problem is in the sensor, not the lens. And also, don't bother too much with MF on a compact like the S100, it's not that great.

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PostPosted: Sat Jan 12, 2013 2:26 pm 
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I think he means audio noise ;)
The AF-motor can actually make some silent noise and there's nothing you can do about it. Well, you can use MF, and here's a trick: close the aperture a bit (f/2.8) and set the focus at 2.5-3 meters. Quite a large bit of what youre filming should be in focus now.

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PostPosted: Sat Jan 12, 2013 2:39 pm 
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Oh sorry :oops:

Well some way to fix the problem would be also not changing really fast from a close object to a distant one, but rather to do a smooth, slow transition.

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PostPosted: Sat Jan 12, 2013 10:26 pm 
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Sorry, I should have said audio noise. It is always noticeable on starting the video shooing and then occasionally, presumably due to the AF. I've tried it with MF and that solves the problem, but often I just want to shot at a moment's notice. The bottom line is that it should not happen at all. For eg, under identical quiet conditions I used a Lumix TZ30 and this operated with no audio problems at all, even when it has to change focus. I usually shoot video with a Sony NEX-5 and that also has no problem with "woodpecker noise" focussing under quiet conditions.
I used the term "woodpecker", as this what it has been referred to by another owner who noticed the same problem. See posting by "Gary. H" on http://forums.steves-digicams.com/conta ... -s100.html


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PostPosted: Sun Jan 13, 2013 4:17 am 
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Well because the S100 doesn't have USM focusing, a small noise can possibly be heard, but I'm not sure how loud it is. Do you only hear it in the recording or can you hear it live as well?
Also, if it isn't a manufacturing problem, maybe the S110 isn't better, it doesn't have USM either.

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PostPosted: Sun Jan 13, 2013 5:15 am 
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The noise is quite evident while recording if you listen carefully in a quiet room. It is very evident in a recording. I've uploaded a short clip (8MB) to Dropbox if anyone would like to see what I am talking about. The file can be downloaded at:
http://dl.dropbox.com/u/99069397/Canon% ... 20test.wmv
(This is first time I've used Dropbox for this, so hope it works OK!)


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PostPosted: Sun Jan 13, 2013 1:37 pm 
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Works perfectly, thanks. I can hear the noise and I see what you mean by "woodpecker" noise. I'm not sure if there is another way to fix it other than using MF, but as I said before, and I noticed it in the video, when you change from a subject to another slowly, the noise won't be so loud.
Other than that, I'm unsure as how to fix it. Maybe using a noise filter with a video editing program, but that might be too much for just a noise.

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