topic Re: Broken Contact - EF 100-400 LENS will not work in EOS DSLR & Mirrorless Cameras

Broken Contact - EF 100-400 LENS will not work

bama924 — Mon, 20 Sep 2021 16:10:31 GMT

I have a t8i that I use for sports photography, went to shoot soccer matches Saturday, but my t8i would not shoot? Had to use my back up. Just noticed that one of the contact on the end had broken off, other lenses work, but not the 400. Can this be repaired, or am I out a camera?

Re: Broken Contact - EF 100-400 LENS will not work

jrhoffman75 — Mon, 20 Sep 2021 18:41:03 GMT

What contact? One of the contacts in the body that mate to the lens? Can you post a screen shot?

Re: Broken Contact - EF 100-400 LENS will not work

bama924 — Mon, 20 Sep 2021 19:25:43 GMT

It is the contact in the body of the camera.

Re: Broken Contact - EF 100-400 LENS will not work

John_ — Mon, 20 Sep 2021 19:31:03 GMT

Contact Canon, it can be repaired

Re: Broken Contact - EF 100-400 LENS will not work

bama924 — Mon, 20 Sep 2021 19:34:12 GMT

I called the 800 number, there was a 40 minute wait. My camera is less than a year old, is there a better way to contact them, and to see if it is covered under warranty?

Re: Broken Contact - EF 100-400 LENS will not work

John_ — Mon, 20 Sep 2021 19:45:20 GMT

You can start a repair request on the Canon website. Whether or not they will cover it under warranty I can't say. It certainly is new enough.

Re: Broken Contact - EF 100-400 LENS will not work

Tintype_18 — Tue, 21 Sep 2021 13:24:24 GMT

Just watching this post, JIC I need repairs by Canon or an authorized repair facility.

Edit: FWIW, I have made it a practice to keep receipts, etc., regarding a purchase for any warranty claims. My wife and I went through a receipt file that weighed about 7 lbs. and pared it down to a few ounces. Tossed info on old TVs, appliances, etc.

Re: Broken Contact - EF 100-400 LENS will not work

ebiggs1 — Tue, 21 Sep 2021 15:09:34 GMT

"Can this be repaired, or am I out a camera?"

I have no doubt that Canon can repair this. However, are you a person that cleans the contacts regularly? Perhaps vigorously?

Nothing but a soft q-tip with a bit of alcohol on it is best. I don't even recommend folks do that if they change lenses often as the mounting and unmounting will keep the contacts clean enough.

If it just failed or fell out for some reason, I can't see how they can deny a warranty repair but I'm not Canon. It will surprise me if they do deny it.

Re: Broken Contact - EF 100-400 LENS will not work

wq9nsc — Tue, 21 Sep 2021 15:19:40 GMT

I suspect Canon will cover the repair. That type of failure isn't something that would occur through typical mishandling.

It appears the connector pin probably had a material flaw and sheared in the center; perhaps this spring loaded pin jammed in the extended position and sheared off but neither case would be caused by the customer.

Even milspec parts have a non-zero manufacturing defect rate and milspec connectors wouldn't be used in this application.

This should be a simple repair for the service center assuming that connector assembly isn't one of the many weird pandemic related parts shortages.

Rodger

Re: Broken Contact - EF 100-400 LENS will not work

Stephen — Tue, 21 Sep 2021 15:37:15 GMT

You can go to your My Canon Account and start the repair process. It will walk you through the whole thing step-by-step.

Once our team gets your gear, they'll let you know upon evaluation whether it's considered covered under warranty or physical damage - only the folks at the Factory Service Center can determine that.

You'll want to make sure to upload your proof of purchase (receipt) to your My Canon Account when you register your camera - that will expedite your repair process and let the team know it's still within the warranty period, too. A legible copy/PDF of the invoice is required - not a credit card statement.

Re: Broken Contact - EF 100-400 LENS will not work

bama924 — Tue, 21 Sep 2021 18:36:24 GMT

Nope, just fell out. I filled out a repair and it is covered under warranty.

Re: Broken Contact - EF 100-400 LENS will not work

John_ — Tue, 21 Sep 2021 19:13:16 GMT

One other thought worth mentioning is where did that piece of broken contact end up? Hopefully, it fell to the ground or the floor and not into your camera's body or into your 400MM lens. That could explain why that is the only lens that is not working.

Re: Broken Contact - EF 100-400 LENS will not work

bama924 — Tue, 21 Sep 2021 20:21:11 GMT

I've got it, it was in the camera, but I got it out. It must have broken off when I was either putting on, or taking off, the lens.

Re: Broken Contact - EF 100-400 LENS will not work

John_ — Tue, 21 Sep 2021 20:32:14 GMT

Glad to hear that! How do the contacts on that lens look? Hopefully, they did not get damaged in the process.

Re: Broken Contact - EF 100-400 LENS will not work

jrhoffman75 — Tue, 21 Sep 2021 20:35:28 GMT

Or be the cause of the camera pin failing.

Re: Broken Contact - EF 100-400 LENS will not work

John_ — Tue, 21 Sep 2021 20:42:30 GMT

Good point I was wondering if a lens contact snagged that pin and broke it off.

Re: Broken Contact - EF 100-400 LENS will not work

ebiggs1 — Wed, 22 Sep 2021 13:33:09 GMT

"... I was wondering if a lens contact snagged that pin and broke it off."

Might be a good idea to send the lens along with the camera.