Are there such situation(s) that can cause a camera (can be a point and shoot camera or a DSLR Lens) Lens to lose its image stabilization ability?
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For why IS may appear to not be working you may also want to look at: http://photo.stackexchange.com/questions/6039/why-is-image-stabilisation-making-images-unsharp?rq=1 and http://photo.stackexchange.com/questions/8803/should-i-keep-image-stabilization-is-off-when-i-do-not-actually-need-it – forsvarir Jun 12 '12 at 07:06
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@Miljenko -- rather than commenting (which adds noise) you can edit the post to correct obvious typos. – mattdm Jun 12 '12 at 10:53
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2Is this theorectical, or are you trying to troubleshoot a problem? – mattdm Jun 12 '12 at 10:54
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@mattdm: I recon this to be more polite. But noise-wise, you are right, and I'll do that in the future. – Miljenko Barbir Jun 12 '12 at 12:19
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1@Miljenko -- on this site, just fixing simple problems is more polite. It's different from a typical forum, in that the goal is to collaboratively create the best possible questions and answers. – mattdm Jun 12 '12 at 12:23
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If you're talking about lenses permanently losing their stabilisation ability this could be due to any of the following factors
- failure of the switch which activates IS
- faults of the motion detection sensors
- failure of the control system
- failure of the IS motors
- jamming of the IS lens elements
which in turn may be the results of
- manufacturing defects
- physical shocks to the lens
- moisture or water damage
Matt Grum
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I assume the optical IS function that is built into lenses is micro-gyro based, not image movement based, and so may be affected by a strong magnetic field.
Also, dirty contacts can cause all sorts of errors.
mattdm
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