topic Re: Damaged af for the lens if camera? in EF & RF Lenses

Damaged contacts affecting focus?

I_ask_questions — Thu, 12 Dec 2024 16:54:00 GMT

I was taking photos today and usually i have clean not kinda out of focus photos but today was different. i was looking at my photos and realized one of my photos are kinda out of focus so i reaserch it and found out my lens af cpu could be damaged so i look at my lens and i find this big streak going through each one.and was wonder If this was normal.

Re: Damaged af for the lens if camera?

shadowsports — Mon, 02 Dec 2024 04:00:31 GMT

Greetings,

What camera and what lens are you using?

None of my bodies or lenses I've ever owned had trough like indentions like the contacts in your photo. The next question I'll ask is are you using some type of adapter or TC on this lens currently or previously? If so, which? You'd have to put a lot of pressure on a lens contact to dent it like that

Re: Damaged af for the lens if camera?

normadel — Mon, 02 Dec 2024 05:42:21 GMT

What lens is this, and what camera body? Is there any other device between lens and body?

Re: Damaged af for the lens if camera?

I_ask_questions — Mon, 02 Dec 2024 06:18:11 GMT

Canon 4000d and sigma 150-500 ef no adapter and i dont put much pressure on the lens

Re: Damaged af for the lens if camera?

I_ask_questions — Mon, 02 Dec 2024 06:18:39 GMT

Canon 4000d with sigma 150-500mm ef lens with no adapter

Re: Damaged af for the lens if camera?

I_ask_questions — Mon, 02 Dec 2024 06:19:12 GMT

Although i did buy it used so the other may have

Re: Damaged af for the lens if camera?

normadel — Mon, 02 Dec 2024 06:27:10 GMT

Well, the lens IS damaged, for sure. If this is the way you bought it, you got taken.

Re: Damaged af for the lens if camera?

I_ask_questions — Mon, 02 Dec 2024 07:24:16 GMT

Dang 😞 thank you!

Re: Damaged af for the lens if camera?

I_ask_questions — Mon, 02 Dec 2024 07:36:30 GMT

Also is the streak normal if it wasnt as bad??

Re: Damaged af for the lens if camera?

shadowsports — Mon, 02 Dec 2024 09:45:57 GMT

Greetings ,

As you can see we both started asking the same questions. This condition is not a normal occurrence and this lens does appear to have seen some neglect or abuse.

If returning the lens is an option I would pursue that. If not, the lens can likely be repaired by Canon. Start by registering the lens in your My Canon account. From there, you can initiate a repair request.

Re: Damaged af for the lens if camera?

ebiggs1 — Mon, 02 Dec 2024 15:43:47 GMT

You didn't mention if you had just recently bought the lens used so did you? Canon cameras have spring loaded contacts and it is not possible for a Canon camera to gouge out the contacts on the lens. Someone had to use an adapter or tel-con most likely a cheap off brand unit that did not have the spring loaded contacts.

The real bad thing is, whether you did the damage or someone else did, they need to be replaced. Usually this means replacing the sub assembly that the contacts live in.

Re: Damaged af for the lens if camera?

I_ask_questions — Mon, 02 Dec 2024 22:01:19 GMT

Thank you!

Re: Damaged af for the lens if camera?

I_ask_questions — Mon, 02 Dec 2024 22:03:14 GMT

could i get the contacts repaired at any camera store?

Re: Damaged af for the lens if camera?

normadel — Mon, 02 Dec 2024 23:31:26 GMT

No, not ANY camera shop. Some have repair facilities, others could recommend repair services or ship it out for you. Parts availability is a question. You ought to find out if Sigma has a repair service, like Canon does for their products. They could quote you on cost. The lens may or may not be worth repairing, versus buying another one from a good used equipment dealer, like KEH.com, MPB.com, or UsedPhotoPro.com. They give warranties.

Re: Damaged af for the lens if camera?

I_ask_questions — Tue, 03 Dec 2024 01:19:39 GMT

Will do. Again thanks for your help!

Re: Damaged af for the lens if camera?

Ron888 — Tue, 03 Dec 2024 02:42:35 GMT

Well this is odd.No matter how close i look at those contacts,none seem to be bent.
Are you referring to the dark strips across the middle group of contacts?Because that's relatively normal.To be sure,clean them with a little alcohol

Re: Damaged af for the lens if camera?

I_ask_questions — Tue, 03 Dec 2024 04:28:54 GMT

You are correct none are bent its just odd how there is a streak to me and seems worse than normal but i will be sure to clean witb alcohol

Re: Damaged af for the lens if camera?

shadowsports — Tue, 03 Dec 2024 04:39:30 GMT

So I see now this was a sigma lens based on your report and not Canon, so obviously you'll need to contact Sigma instead of Canon for repair options. Ebiggs1 is correct. As far as the repair goes, the entire mount assembly that houses the contacts will have to be replaced if those are indeed dented. If damaged, the lens will remain unreliable until it's addressed.

Re: Damaged af for the lens if camera?

Ron888 — Tue, 03 Dec 2024 06:30:27 GMT

I've owned many lenses with these marks.I cant remember that last time i've had such a lens not work.
In any case if it gives any more problems it's best to contact sigma.It may need a firmware update perhaps

Re: Damaged af for the lens if camera?

ebiggs1 — Tue, 03 Dec 2024 19:10:24 GMT

" If damaged, the lens will remain unreliable until it's addressed."

Absolutely, and may not be reliable even if they are not physically dented or gouged out.