iFixit - Answers With Device "Camera Lens"

Other Lens: Do you know how to re attach?

Mon, 23 Mar 2026 13:36:02 -0700

it decided to open up on me and messed up focusing, how do i keep this attached?

Ttartisan 23/1.8 af

⟐ Edited by author March 23, 2026 at 13:36 MST

Canon EF-S 18-55mm F3.5-5.6 IS II: Camera EOS 600D doesn't turn on with this lens

Thu, 01 Jan 2026 15:40:25 -0700

Hello, Got a Canon pakkage with Canon EOS 600D camera and two lenses; a 50mm-0,45m/1,5ft and a Canon EF-S 18-55mm F3.5-5.6 IS II. The 50mm lens is working good, but the 18-55mm lens doesn't turn the camera on. The fisrt two times i tried this lens, it was working. After that it didn't anymore. Took out the simcard and batterypack and disconnected the lens. Put everything back in place and the camera was working for a small period of time. Now the camera doesn't turn on with the 18-55mm lens; camera still works good with 50mm lens. Do you have any suggestions? thank you, greetzzz, André

Canon EF 35mm F1.4 L USM: Autofocus hunts back and forth fast and won't lock on subject usually.

Sun, 01 Jun 2025 21:33:16 -0700

Autofocus hunts back and forth fast and won't lock on subject usually. If it is brighter it seems to lock at least in the inside room I tried it in. Wondering what parts fail and how can I get it fixed or dyi at a reasonable price.

Canon EF-S 18-55mm F3.5-5.6 IS II: How to disassemble and remove lens fungus from inside?

Fri, 15 Nov 2024 01:10:07 -0700

I have a Canon EF-S 18-55mm f/3.5-5.6 IS II which came along with my Canon EOS 650D and has lens fungus internally. I can't really afford to have it getting cleaned by a professional and I am not new to tinkering and disassembling things. The lens fungus affects my shots terribly, making the light all fuzzy and scattered.

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

Sigma Lens: Sigma UC Zoom 70-210mm assembly

Fri, 15 Nov 2024 01:15:34 -0700

Does anyone have pictures or directions or a manual on how to assemble this lense. I took it apart a while ago and I still have all the parts I just don't remember how to put it back together. Where does the small metal plate go and the spring etc.

⟐ Edited November 15, 2024 at 1:15 MST

Sigma 24-70mm F2.8 EX DG Macro: Where can I get spare parts for my sigma 24 70 EX HSM for canon

Fri, 27 May 2022 11:44:32 -0700

I'm looking for the plates that cover some screws of the zoom mechanism and the focus motor

Canon Lens: My 18-55mm lens is refusing to work on Auto Focus

Fri, 15 Nov 2024 01:15:03 -0700

I have a Canon 18-55mm lens that won’t function if its on Auto Focus. What could be the problem. Please help

⟐ Edited November 15, 2024 at 1:15 MST

Camera Lens: Fix the Lens Body scratches?

Sun, 08 Nov 2020 20:14:41 -0700

I have a number of vintage Pentax prime lenses from 28mm f2.8 to 500mm f4.5 (circa 1955). Is there an acceptable method to fix/recoat/cover nicks and scratches on the exterior surfaces of the lens body?

Permanent magic marker ? (would rub off)

Spot Cold bluing ??? (ref: Birchwood Casey Aluminum Black)

Spot anodization ???

Spot painting ??? (ref: Birchwood Casey Super Flat Black )

Something else ???

⟐ Edited by author November 08, 2020 at 20:14 MST

Nikon Lens: Focus of nikon 55-200 lens stuck

Thu, 21 Nov 2024 02:24:14 -0700

My Nikon 55-200 mm f/4-5.6G AF-S lens focus is stuck midway. I can't use the lens and camera is displaying can't use non cpu lens . What may be the reason for this ?

⟐ Edited November 21, 2024 at 2:24 MST

Canon EF 17-40mm F4L USM: Canon 17-40mm lens, focus ring binding, missing shims?

Thu, 21 Nov 2024 19:55:08 -0700

Lens repair gurus - would appreciate your help!

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

Canon EF 24-105mm F4.0 L IS USM Objektiv: Clean Canon ef 24-105mm L IS USM auto focus lens elements

Thu, 09 Apr 2020 17:58:48 -0700

In order to clean particles trapped within the central lens assembly the auto-focus, image stabilization unit must be opened in order to release the small lens elements in order to clean or at least remove trapped dust or particles. Can this even be done?

Nikon Lens: Nikon 24-70G F2.8 Autofocus Fault

Thu, 21 Nov 2024 02:02:01 -0700

A few weeks ago, my Nikon 24-70G can not autofocus. I'm tear it down to try to find out what's problem in that. Is that SWM fault? See my video: https://youtu.be/8Eo2FtqRoes

I have ordered a SWM. Hope I can fix it.

⟐ Edited November 21, 2024 at 2:02 MST

Canon EF-S 18-135mm F3.5-5.6 IS: Factory canon efs 18-135 mm lens IS won't manually focus

Thu, 21 Nov 2024 19:40:46 -0700

Hello guys,

This started to happen after I got this wet (there is another totally different problem which started to happen at the same time with the battery). Anyway, it won’t let me manually focus. I have another lens, a macro lens, which manually focuses fine, so seems like the lens. Any possible fix on this or is it likely the water damage roasted this feature?

I believe I tried with another lens in the shop and it was also working fine, so again pretty sure it’s the lens and not the camera for this issue.

Thanks!

⟐ Edited November 21, 2024 at 19:40 MST

Canon Lens: Canon 16-35 is f4 usmii apature Flex Cable replace and lens not sharp

Thu, 21 Nov 2024 00:34:06 -0700

I replaced my canon 16-35 is f4 usm ii lens. But i dont know how to fix focus after replace flex cable pls guid me to do that thanks a lot.

⟐ Edited November 21, 2024 at 0:34 MST

Camera Lens: Repair Tamron 70-200 Macro AF A001 lens

Fri, 05 Apr 2019 07:29:00 -0700

Hi, I have a 700-200 Macro AF A001 lens. The AF motor broke, and manual focus is not working well either, it’s very tight and doesn’t turn easily. Would you be able to fix such a thing? Thank you!

Camera Lens: Cleaning Sigma lens 28-85

Thu, 21 Feb 2019 18:27:56 -0700

How to I clean an Sigma Zoom 0ll f-28-85 multi coated lens

67mm. ?

I already cleaned the external ,but inside look difficult.

Nikon Lens: The VR button nikkor 18-105mm not functioning

Fri, 15 Nov 2024 01:17:22 -0700

I have replace anti shake flex cable but the focus not functioning well. If I zooming its working. If off the at focus in lens it working but image not focus.

⟐ Edited November 15, 2024 at 1:17 MST

Nikon Lens: Can my crooked lens be fixed? It’s a Nikon DX VR

Fri, 15 Nov 2024 01:17:06 -0700

I bumped my lens while attempt to take a picture and now it is crooked, off center, and won’t retract. Is there anything I can do?

⟐ Edited November 15, 2024 at 1:17 MST

Sigma 24-70mm F2.8 EX DG Macro: My lens don't spring from 24mm to 35mm

Sat, 17 Nov 2018 08:49:39 -0700

hello,my lens don’t go from 24mm to 35mm .in other measurements no problems. I have d800 .maybe do well on other dodies like d7200 or 5500?

Camera Lens: My magnification seems to not be changing

Sun, 21 Oct 2018 00:55:18 -0700

My Tamron 70mm 300m the zoom ring you might call it seems to of gone all loose so nothing happens to the magnification