i totally no idea why does my lens resist on twisting whenever i zoom in or zoom out, i does require a certain amount of force just to twist the barrel of the lens.

how to fix this?

⟐ Answered December 25, 2020 at 2:41 MST

⟐ Answer accepted January 22, 2017 at 13:55 MST

Today i present my trusty old 18-55 kit lens (F3.5-5.6) which has been gradually failing. I was teaching someone a bit about cameras and were trying to take photos and it just stopped. When holding the shutter button down half way, the lens focus ring barely moves if at all. This either requires me to manually focus my shots now or use my other non-IS lens (my 75-300 EF).

I use a 450D ancient camera and i have verified the aforementioned zoom lens works with AF perfectly, however not the kit lens.

I would assume my AF motor is toast however does anyone have any suggestions for fixing this apart from tearing it down (I'm going into this blind as there are no guides on ifixit for this seemingly common place lens).

⟐ Answered January 03, 2026 at 17:44 MST

⟐ Answered October 20, 2024 at 18:19 MST

This is what it is doing

So I got the motor yesterday and but everything back together and now it’s says make sure Lens is attached when in video mode and then when I go to photo the f stop flashes from 3.5 to 0 and the af mode goes from -ai servo to MF idk what I did wrong or if the guy sold me a faulty motor

⟐ Commented August 29, 2025 at 15:09 MST

help out with the issue!

⟐ Edited November 22, 2024 at 17:50 MST

It has a problem in focusing at infinity.

If the lens is set to 10m and the subject at 500m the focus (autofocus) stops at about 20-30 m

If the lens is set beyond infinity the focus (autofocus) works.

I tried to adjust the trimmers present in the lens (noting the prime references) but I was unable to solve the problem.

I suspect that a slot (the last one) of the autofocus encoder is dirty or something similar.

@zephosk Help Me :-D

⟐ Answer accepted January 19, 2025 at 0:28 MST

⟐ Commented January 12, 2025 at 0:33 MST

⟐ Answered June 29, 2022 at 20:49 MST

Not sure what my next option would be. These are tiny tiny screws not sure a dremel tool would be small enough to make that cut. Also, I have no idea where to buy replacement screws for it.

⟐ Edited November 21, 2024 at 20:21 MST

⟐ Edited November 15, 2024 at 1:10 MST

Thanks!

⟐ Edited December 22, 2024 at 18:14 MST

I can't seem to find a disassembly guide for the specific lens either, those on youtube are for older models/versions of the lens and I am unsure whether how they disassemble it applies also to what I have.

⟐ Edited November 15, 2024 at 1:10 MST

Just repaired a 17-40mm with a broken front barrel (filter threads broken) which also had a problem with a stiff focus ring. I was hoping replacing the front barrel would remedy the focus ring problem, but it didn’t and I ended up replacing the middle barrel as well, but the focus ring is still very hard to turn. (A problem from before I started the repair.

Its not binding in any one specific spot of the rotation, and it isn't bent (checked with caliper). It rotates fine before I tighten down the middle barrel, but once its tightened down it starts to bind and become really hard to turn. The autofocus works perfectly fine as do all the other functions of the lens.

Could this lens have been disassembled before and had some kind of spacer left out? Or is there some trick or reassembly procedure i'm supposed to be following?

Again, thanks for any help!

⟐ Edited November 21, 2024 at 19:55 MST

Does anyone have experience on repair lens Canon EF-M 22mm f/2 stm - broken aperture. The petals stuck.

My mail - h-mech@yandex.ru

⟐ Edited November 15, 2024 at 0:50 MST

Is there a way I can fix this myself?

⟐ Edited November 21, 2024 at 1:45 MST

⟐ Edited November 22, 2024 at 18:51 MST

⟐ Edited November 15, 2024 at 1:23 MST

can any one has a repair guide?

https://www.youtube.com/watch?v=DS9GBM8-...

⟐ Commented July 22, 2025 at 9:09 MST