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Image Stabilization Question
Hi All,
I'm a newcomer to IS lenses, and have just taken receipt of a new Canon 40D with 28-135mm IS USM lens.
It's difficult to tell whether the IS is working. I've read that it makes up to three stops' difference, but mine seems to be making little or no difference at all. If I have the camera on, say, Tv mode, should the shutter speed jump up when the IS is put on? Or does the IS effect not show on the exposure info? If not, how are you meant to know what speeds/apertures you can get away with?
Apologies for the novice question. Explanations greatly appreciated.
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