topic Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera in EOS DSLR & Mirrorless Cameras

EOS Rebel T3 & T7: Auto focus no longer works on either camera

basicbob101 — Thu, 02 Oct 2025 15:49:09 GMT

my auto focus feature no longer works on either camera, is this a function of the camera body which is the only part with power, or a problem with the lens. Also can or how can it be corrected? any help appreciated. thanxz bob

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

justadude — Thu, 02 Oct 2025 14:46:46 GMT

I guess the first question would be is have you tried a different lens? Asking because if it's just one lens, your problem lies with it. The other question is, did this happen at the same time on both bodies?

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

basicbob101 — Thu, 02 Oct 2025 14:59:44 GMT

thanxz justadude for your response. here is the situation, i had the EOS3 for years and the auto focus stopped working, bought the EOS 7 from a pawn shop with a lens. the auto focus worked before i bought it and now a few weeks later doesn't work. tried switching both lens back and forth and still no results, very frustrated now i have two cameras and two lens but no auto focus on either. don't know if this helps or not. but thanxz in advance for any assistance or advice

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

basicbob101 — Thu, 02 Oct 2025 15:00:27 GMT

PS both are set on AF nor manual

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

basicbob101 — Thu, 02 Oct 2025 15:06:20 GMT

just thought of an alternate test, tried a long distance lens and the AF works on the, tried the 7 and screen message was no card, put card in from the 3 and message is card cannot be accessed, if i reformat the card i will loose all pic, will download pics to laptop and then try

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

deebatman316 — Thu, 02 Oct 2025 15:31:32 GMT

More clarification is needed than saying EOS 3 & EOS 7. Those names were also used for film cameras too. So are you using the EOS R3 body & EOS 7D series. If so are these Canon brand lenses? Complete names of lenses and cameras are needed. To prevent confusion.

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

basicbob101 — Thu, 02 Oct 2025 15:46:20 GMT

both are digital cameras, on the front to the right side of the lens (looking from the camera lens facing you) is EOS Rebel T3 and the other the same except T7 both lenses are canon zoom lens EF-S 18-55 mm, that is all the info except for serial numbers on base, thanxz

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

deebatman316 — Thu, 02 Oct 2025 15:55:56 GMT

Which version of the lenses do you have. Canon has released 9 different versions of that lens. The complete name can be found when the lens cap is removed. I have an example pictures below to help identify your lens. Older versions of the lens used a cheaper AF motor called Micro Motor. Turning the focus ring with the lens set to AF can damage the lens. Along with the gear train and AF motor. The newer versions with “STM” in the name don’t suffer from these problems. This is because the focus ring is NOT directly connected to the lens’ focusing elements. Instead the focus ring is electronic and those lenses use focus-by-wire technology. Preventing any type of damage from happening when turning the focus ring with the lens set to AF.

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

basicbob101 — Thu, 02 Oct 2025 16:03:29 GMT

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

basicbob101 — Thu, 02 Oct 2025 16:06:22 GMT

on base of lens for both is:EFS 18-55mm IMAGE STABILIZER MACRO 0.25M/0.8FT

Maybe I damaged something by rotating the lens manuallly when in AF mode did not know that could happen, thankxz

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

deebatman316 — Thu, 02 Oct 2025 16:18:16 GMT

Yes you could’ve possibly damaged the lens when turning the focus ring in AF mode. The AF motor could’ve come out of alignment. This is an older lens that uses the older and cheaper AF motor called Micro Motor. This AF motor has been discontinued by Canon and was in production from 1991-2011. STM lenses don’t suffer from this problem because of the focus-by-wire design. These newer STM variants focus much faster and quieter. Kit lenses aren’t worth repairing. The cost to repair will exceed the value of the newer STM variants of the lens. I don’t know your budget for a new lens. Canon offers multiple options for standard zoom APS-C lenses.

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

basicbob101 — Thu, 02 Oct 2025 16:21:23 GMT

thanxz for the info, sounds like i need to buy a new lens. are the old lens of any value? maybe put them on ebay with a disclaimer that auto focus will not work must use manual focus

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

deebatman316 — Thu, 02 Oct 2025 16:38:28 GMT

Older kit lenses don’t hold very much value at all unless it a newer STM or USM version. Example replacement lenses below. Canon has discontinued EF/ EF-S lenses. But some can found as existing new stock, used or refurbished directly from Canon. I would recommend at you get a newer USM or STM version of lenses. Older versions may not be serviceable by Canon if the lens were fail.

EF-S 18-55mm F/3.5-5.6 IS STM
EF-S 18-55mm F/4-5.6 IS STM
EF-S 18-135mm F/3.5-5.6 IS USM
EF-S 18-135mm F/3.5-5.6 IS STM
EF-S 17-55mm F/2.8 IS USM

Re: Rebel EOS 3 and EOS7: Auto focus no longer works on either camera

basicbob101 — Fri, 03 Oct 2025 20:27:58 GMT

thanxz