16-35 f/4 IS - Image Stabilizer noise?

never noticed on other IS lenses I've owned but there's an audible "Tsss" noise when the IS turns on or off. Is this normal? Anyone else notice this on their copy?

Bryan Carnathan found the same noise in his experiences.

From TDP:

"From an audibility perspective, you will hear a light "cssp" at IS startup and again at shutdown, but IS operation is nearly silent during use – even when panning rapidly."

I guess that clears it up.

I guess you never tried a 70-200/4is nor 24-105 ? Those are noisy lenses ! Recent L lenses are really quiet for sure (70-200 II for instance), but if you're caring you can heard that little IS noise. Don't be afraid of it !

cherrymoon wrote in post #17085358
I guess you never tried a 70-200/4is nor 24-105 ? Those are noisy lenses ! Recent L lenses are really quiet for sure (70-200 II for instance), but if you're caring you can heard that little IS noise. Don't be afraid of it !

Never heard much noise from my 24-105L but the 70-200 f/4L IS does make a racket!

I remember my 24-105's noise was like a 5400rpm hard drive trying to read... you remember that whirring noise? My 24-105's IS noise was like that but very very very soft...

I must admit though that the 16-35 IS noise is very distinctly different than other lenses.

But well documented.

I've never even noticed the IS noise on the 16-35, as silent as my 35mm IS. I know my hearing is shot but is it really that audible, or do you have to "try" and hear it?

On a side note, i've read that the IS activation on the 300mm F/4L is similar to one racking a shotgun. Might be an exaggeration though

Like a drum, certain lens sizes in length and diameter seem to resonate the frequency of the IS more than others. Like many have said the 70-200 f/4 L IS seems to be more noticeable.
On my drum kit, no matter the tuning, my 7"x8" Tom will resonate the snares more than all the rest. No big deal. You get used to it.

I have never used the 16-35 but my 24-105 makes a ton of IS noise and as far as I can remember every IS lens I have ever used has made some form of noise when you activate the IS. I wouldn't be worried by it.

If the OP has sensitive hearing, then yes its perfectly normal to hear a slight sound when the IS is activated. I do hear the IS whirring away on my 35 f/2 IS and even that is not particular loud, by most standards its actually pretty quiet. So if I had to take a gander at whether or not you can, if you have sensitive hearing then you probably will hear the IS mechanism on any modern/recently released canon lens.

My 70-200 f4 is louder.

NinetyEight wrote in post #17087080
Never heard much noise from my 24-105L but the 70-200 f/4L IS does make a racket!

Exactly my experience. The IS in the 24-105 has never made a peep for me but wow the rented 70-200 f/4 IS was downright annoying with the IS sound (still a great lens, though).

My 35 f/2 IS is silent as well.

If the 16-35 f/4 IS behaves the way the 70-200 f/4 IS did, it would be helpful to know that before buying.