topic Re: Auto Focus on 18-55mm lens not working in EF & RF Lenses

Auto Focus on 18-55mm lens not working

rca1992 — Thu, 27 Aug 2020 15:24:47 GMT

Up until today my 18-55mm lens has been working just fine while on AF; however, today when I took my camera out I found that the AF feature wasn't working. It works fine when on MF. The thing that I find wierd is that the AF does work [kind of] if the camera is on live view [using the screen to track a shot rather than the view finder], but that even that is limited. Any ideas on how I'm able to fix this?

Thanks in advance!

Re: Auto Focus on 18-55mm lens not working

Waddizzle — Thu, 27 Aug 2020 16:32:24 GMT

@rca1992 wrote:
Up until today my 18-55mm lens has been working just fine while on AF; however, today when I took my camera out I found that the AF feature wasn't working. It works fine when on MF. The thing that I find wierd is that the AF does work [kind of] if the camera is on live view [using the screen to track a shot rather than the view finder], but that even that is limited. Any ideas on how I'm able to fix this?

Thanks in advance!

What camera, and what is the full model number of the lens? Does the model number end with "STM"?

Re: Auto Focus on 18-55mm lens not working

rca1992 — Thu, 27 Aug 2020 21:03:40 GMT

The camera is a Canon T3i. The lens is an EFS 18-55mm with image stabalization.

Re: Auto Focus on 18-55mm lens not working

kvbarkley — Thu, 27 Aug 2020 21:11:22 GMT

Please tell us all the numbers and letters in the model name.

Re: Auto Focus on 18-55mm lens not working

rca1992 — Thu, 27 Aug 2020 21:24:31 GMT

8936229483 -- I hope this is the right informaiton needed because it is the only identifying number that I can find on it.

Re: Auto Focus on 18-55mm lens not working

kvbarkley — Thu, 27 Aug 2020 21:43:48 GMT

No, around the inside of the filter ring it will say something like EF-S 18 - 55 F/3.5-5.6.... We need all those numbers

Re: Auto Focus on 18-55mm lens not working

Waddizzle — Thu, 27 Aug 2020 21:43:48 GMT

@rca1992 wrote:
8936229483 -- I hope this is the right informaiton needed because it is the only identifying number that I can find on it.

No, that isn't the model number. Look at the art that says "EF-S 18-55mm". There should be more stuff written after it.

Re: Auto Focus on 18-55mm lens not working

rca1992 — Thu, 27 Aug 2020 21:51:10 GMT

Okay, hopefully I've got it this time. Clearly you can tell I'm a rookie! I have a canon EFS 18-55mm image stabalizer macro 0.25/0.8ft lens.

Thanks for your help!

Re: Auto Focus on 18-55mm lens not working

ebiggs1 — Fri, 28 Aug 2020 13:29:29 GMT

Did you by chance try to focus it while it was focusing? Even if you just accidentally touched the focus ring?

Re: Auto Focus on 18-55mm lens not working

rca1992 — Fri, 28 Aug 2020 14:13:54 GMT

That is a possiablity. Is there a quick fix that I can try?

Re: Auto Focus on 18-55mm lens not working

ebiggs1 — Fri, 28 Aug 2020 14:31:53 GMT

You can try this depending on what model lens you have, this might work.

Take the lens off of your camera.
Put the lens in MF mode.
Twist the FOCUS ring (the tip of the lens) all the way to one side (extend it). You may hear a click noise or two, this is good, but don't FORCE the lens.
Twist the FOCUS ring all the way to the opposite side (retract it). Again, you may hear a couple of clicking noises. What we hope is happening is the focusing motor being put back into its proper place.
Put the lens back on the camera.
Put the lens in AF mode.
Turn the camera on.
Put the camera in AUTO or P mode.
Take a test photo.

Re: Auto Focus on 18-55mm lens not working

rca1992 — Sat, 29 Aug 2020 16:43:49 GMT

Thanks so much for your help! I managed to get it working again!

Re: Auto Focus on 18-55mm lens not working

ebiggs1 — Sat, 29 Aug 2020 19:25:35 GMT

Great!