500D - Inconsistent Sharpness

Started May 10, 2009 | Discussions thread
Peter 13
Veteran MemberPosts: 8,301
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Re: Is the IS working?
In reply to kkelly, May 14, 2009

kkelly wrote:

According to your question, no I don't feel the IS working, as I'm
used to with other lenses normally you'd hear a quaint buzzing sound,
I don't hear it with this lens, I just thought L lens are really
quiet.

How do I test 'exactly' if the IS is working?

On some lenses, IS is almost silent. I used that lens some time ago and do not remember whether it was silent or not. The effect of the IS is best seen at the long end. You can just see how the image stabilizes in the viewfinder when the shutter button is halfway pressed. If there is no differnce, you have a problem. Make sure that the IS is on first.

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