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| p.1 #3 · 24-105L Owners, tell me this is normal |
Perfectly normal. What you describe sounds exactly like mine - I just tried it. Of course, there is very little ambient noise here. In many normal situations, you won't hear it, at all.
The IS on this lens is actually more quiet than many older, first-gen IS lenses, like the 300/4L IS. The delayed soft mechanical click is the IS turning off, after you release the shutter button.