30D shutter release problem

Sep

4

22 Sep 2009 - 8:33 AM

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This problem is slowly getting worse.I depress the shutter release to auto focus etc,then fully press to take the shot....but it doesn't always take the shot.I've scanned through the web,and come up with a common problem on 20,30 and 40D's,in that the 4 sensors beneath the button get dirty,therefore breaking the connection.
What I'd like to know,is if anyone has had this problem,was it necessary to ship the camera off to canon for repair,or is it something that I could possibly repair my self?

Thanks in advance for any input.
/|\ Sep.

Sep

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22 Sep 2009 - 8:48 AM

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Thanks M.
but it happens with all lenses.
The only time that it doesn't happen,is when I use a cable release,
which I think is a big enough pointer to it being the camera.

Sep

4

22 Sep 2009 - 9:00 AM

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Quote: If your feeling brave, there is this video tutorial.
link

Oh dear.....best go get my screwdriver and magnifying glass.
I'll let you know how it goes.

strawman

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22 Sep 2009 - 10:56 AM

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First off your 30D/Sigma lens issue sounds like a lens problem, and I have found it with some poor lenses. If it were the camera all lenses would do it.

There is a custom function you can turn off (well there is on the 40D) to allow the shutter to fire without accurate focus lock, but you tend to get more out of focus shots.

It could be you should send the sigma back, but first which one is it as some of their lenses have poor performance in this respect.

strawman

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22 Sep 2009 - 11:37 AM

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The lens I had a problem with is the 170-500 a close relative of your lens. In short they do not have good AF performance though I did find switching from the 300D to 40D made the situation better in that the later cross AF sensor worked better in the 40D under low light situations. It was more likely to lock focus and less likely to hunt. The new cross sensor came in with the 40D.

So if you find it hunts and occasionally fails to lock focus (especially as the light gets dull) then I would say that is about par for the course. The 170-500 is a bit worse as it is an f6.3 lens pretending to be faster and is right on the light level that some of the canon AF sensors struggle to AF. certainly by F8 the non-pro AF sensors give up from memory.

Sep

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23 Sep 2009 - 9:42 AM

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So what happened?
Well,I sat down with my screwdrivers etc,the video on the monitor,and consequently bottled it.
I just thought that little precision screwdrivers,my clumsy fingers and a 30D body were not designed to go together..
So what did I do?
I picked up a can of WD40,held the camera upside down and fired a bit in and around the button.I then dried all around it and left the camera upside down,just so any excess WD40 will drip out,not drip deeper in.
And the result ?
Problem solved !!!
Maybe only temporarily,but for now,at least,I can get back to enjoying photography and not getting stressed with malfunctioning kit.
/|\ Sep