My 17-40 doesn't like the cold.

Anyone else have problems with their 17-40 f4L acting funny and making a highpitched noise and kinda failing to focus (even with a speedlite AF beam) when it gets cold?

Shot it twice when it was cold out (sub 60's) and both times it's done this. Any ideas? I'm going to be shooting a event on the 22nd of May that has a sizable night portion (Relay for Life...24 hour event) and I don't want it pooping out there (1.5k-2k people). Thinking just getting some fleece or get myself a small scarf to wrap around it.

I used mine in below-freezing temperatures all year with not a single problem. That's weird.

I've used mine in -15+ before the windchill and it's been fine.

I've had mine out in well below freezing temps also, never a problem.

"sub 60s" isn't even approaching cold. At least it shouldn't be as far as pretty much *any* camera gear is concerned. Is that the only time yours is giving you grief?

Sam|McGuire wrote in post #10087329
I've used mine in -15+ before the windchill and it's been fine.

Ditto.

Something is wrong. I have used mine at freezing temperature and no issues.

Maybe time for having in looked at for servicing. Like the others, I've used mine in vary temperatures without a glitch.

my works great in MN winters

NorCalNomad wrote in post #10087261
Shot it twice when it was cold out (sub 60's)

I love it here in California! ... and no, having a lens or body outside when it is in the 50s should have absolutely no affect on the focus.

RandyS wrote in post #10087442
I've had mine out in well below freezing temps also, never a problem.

"sub 60s" isn't even approaching cold. At least it shouldn't be as far as pretty much *any* camera gear is concerned. Is that the only time yours is giving you grief?

yep

Should probably have it checked out.

Probably should get Canon to take a look. Used mine in -15C temperature without any problem.

for you guys who have used your lenses out in the uber cold, for how long did you shot out in this weather?

Several hours. The camera bag gets cold on trips as well.. I have used all my lenses in -10 to -20 celsius without any problem.

Anywhere from 4 to 8 hours on ski trips. When I take a break I usually leave the camera case (with camera inside) on the snow. Haven't had any problems.