Canon EF 28-135mm f/3.5-5.6 IS USM disassembly and assembly - repairing the stuck zooming and focus

[@HomeMachine]

My friend you have no idea how much this video helped me out! Thank you so much for posting such a well made tutorial 👍👍👍👍

[@CamerasLensesEtc]

Thank you for your comment, I'm glad that my video has helped you!

[@busulwapaddy764]

Thank you so much this video helped me fix my lense

[@CamerasLensesEtc]

I'm glad that my video has helped you, thank you for your comment!

[@josecarlosgomezpoison6459]

Muchísimas gracias por tu ayuda. He conseguido limpiar y arreglar mi objetivo. Saludos.

[@CamerasLensesEtc]

I'm glad that my video has helped you, and thank you for your comment.

[@Modellbyggaren]

This video was a huge help for me when I did a repair on my lens. It was great- easy to follow the procedure step by step. Also very precise and I don't think it is possible to make a mistake following your instructions. I'm very happy that my lens is alive again as it is one of my favorites. Thank you!

[@edwinzuidervaart969]

Thank you very much for posting this video, my Canon EF 28-135 didn't zoom out to 28mm because something was stuck at aprox. 50mm. After disassembly I was able to put back one of the cables that came out of it's place. Then I fixed the cable in place with a piece of tape. After reassembly the lens works just fine now. Without this video I didn't know waht to do.

[@CamerasLensesEtc]

You're welcome!

[@macrapidito1]

I was able to fix my lens because of this video, thanks i

[@CamerasLensesEtc]

Thank you for the feedback! I'm glad my video has helped!

[@lygilco]

Thank you - turned out to be a loose zoom screw - the dissasembly tutorial was really helpful.

[@CamerasLensesEtc]

I'm glad my video has helped you!

[@Chemical-H]

Thank you!!! Saved me $110 from a cannon store and it only cost me like $1 for new screws and 45 min of time. Thanks man! great video!!

[@xcard1313]

Great detailed video. Dropped my lens and had the internal ring dislodged just like you explained. Now for some Christmas photos. THANK YOU

[@CamerasLensesEtc]

Glad it helped!

[@angelamehrman9229]

Wow! This was so helpful. I really thought my lens was a lost cause. I was able to fix it with your help. Thanks!!!

[@CamerasLensesEtc]

Glad it helped!

[@Morgan_In_Motion]

Thanks buddy, just ripped mine apart on my breaks at work to take a look and see if I could fix the barrel wobble. Looks like I can't do much for that with out replacing the guides maybe but your video made it very easy to take my lens apart and put it back together with out any left over screws lol

[@CamerasLensesEtc]

You're welcome!

[@gregr1154]

whether this is a good lens or a poor lens, the technique and level of detail is spectacular here! i'm sure 98% of it would apply to repairs on any other lens. awesome!

[@craftymaster]

the pins pushed in during @15:20 came out and the two cylinders came apart. I'm having quite a bit id difficulty aligning all the tracks again to put the white beads back in. any advice on the best way to get it all aligned again during reassembly?

[@CamerasLensesEtc]

Well, check out the parts of the disassembly and assembly videos where you can see those lens tubes, I'm quite sure you can attach the two together correctly by that.

[@craftymaster]

@@CamerasLensesEtc I gave not been able to reassemble it, can anyone confirm if the cylinders using the small white plastic tubes has any mark to help align it, or if perhaps they have multiple acceptable alignments.

[@CamerasLensesEtc]

@@craftymaster I don't think those are eccentric, so doesn't matter their position.

[@callumcunningham8360]

Hey there I think I found the problem. At the mechanism connector at 9:51 was completely disconnected and jingling around. The screws are completely missing however and it looks like they are smaller than the other screws I’ve been unscrewing. Do you know the size of those screws so maybe I could order replacement ones somewhere?

[@CamerasLensesEtc]

That is a quite common problem. I don't know the size of the screw. Are both of the screws missing? Have you checked the inside of the lens, maybe the screws are there somewhere maybe stuck in lens grease?

[@callumcunningham8360]

@@CamerasLensesEtc I opened the whole thing up and didn’t see them. I know they are rather small so it’s possible I missed them somewhere, but I was able to find replacement screws by looking up the Manual that had all the parts listed. I’m hoping that will be right

[@marioandres6738]

Thanks for the tutorial. It is very detailed and has helped me dismantle my objective. I need to change the ring flare because I have 2 broken fixing pins. Where can I buy it? In the video it is at position 15:40 - Thanks in advance

[@CamerasLensesEtc]

Check ebay, maybe there is lens parts are for sale. You might ask Canon service, but I don't think they still sell parts for this old lens, but who knows...

[@voicesofoblivion]

Fantastic tutorial, I have dared to repair my 28-135 according this instruction, took way long, it helped removing pumping auto focus up to 100mm, above it is still not functioning. It is likely the zoom brush seen in 6:30, some pins of mine are twisted, one is broken. How can I get this part? Anyway this video is absolutely useful!

[@CamerasLensesEtc]

Check ebay, there is lots of parts for sale, alternatively you can check out aliexpress.

[@zamnaaguilar4454]

Hello, thanks for this detailed video, I've lost the two screws that holds the metal piece that you are manipulating from minute @ to @ , I haven't been able to find them, do you know what's the size I should get?

[@CamerasLensesEtc]

Can you write the timestamps again? (Generally, you can buy Canon lens screws on ebay.)

[@The-four-o-five]

I'm really not sure if the risk @ 11:00 is worth it. If the loose focusing element crashes into the back of the front lens group, the damage could exceed the lens' worth. Remove the front lens group beforehand (mark its position/orientation before you remove it) and then @ 11:00 push the cam barrel outwards and - after marking its orientation in the cam barrel - grab it carefully and screw it out, then store it in a secure place.

[@CamerasLensesEtc]

Thank you for your tip!

[@mumbakishalachristian500]

Thanks you so much,your video was so helpful to me.

[@CamerasLensesEtc]

Glad it helped!

[@ronis2728]

Hi I am tried to cleaning the lens of EF 28-105 by myself , but I can't assembly the front part (that entend synchronize while zooming), I think it should be similar structure as 28-135 but it seen you didn't show from your video, can you teach me how to do it. Thanks a lot！

[@CamerasLensesEtc]

Hi! I don't have video about the 28-105mm lens, and I haven't cleaned or disassembled it, so I don't know.

[@layhew_9048]

Hey! I'm doing the same thing, if you have any information on the front part of the lens can you share! Thanks!

[@FastJohnnyNardGard]

I have this lens. My particular one has a really bad case of lens creep. When you turn it down the glass wants to slide right out just from the gravity. It looks pretty easy to disassemble, but is there any way to fix the lens creep?

[@CamerasLensesEtc]

Yes, this an easy fix. Disassemble the lens until the USM motor is removed. Then tighten the three screws (wide head, silver color) which connects the front lens element with the inner lens tube.

[@FastJohnnyNardGard]

@@CamerasLensesEtc Thanks I'll give it a go.

[@FastJohnnyNardGard]

@@CamerasLensesEtc Hmm, the screws you mentioned were in there so tight that it took a lot of effort to get them out with a driver that fit them perfectly. I can't imagine I'll be able to get them back in tighter than that. Guess I'm just going to take the entire lens apart, examine it and reassemble hoping it will be better when it's back together.

[@FastJohnnyNardGard]

@@CamerasLensesEtc Nevermind. In the end it was definitely those three screws. The only thing I wonder about now is that the barrel holding the inner lens(es) had a lot of grease on it. It is significantly less greasy now because I was touching it a lot. Great video, there were a few areas you could have touched on just a bit more but this is my first time disassembling a camera lens and it was much easier than I expected, especially with your video.

[@diegoaliaga4435]

deberías permitir los subtítulos automáticos, una lastima que no tenga este video esa opción

[@CamerasLensesEtc]

Thank you for the suggestion!

[@PeterDempsey-yarglags]

The focus of my lens is inconsistent. Sometimes the motor drives in one direction only. Manually focussing is fine. Is it likely to be a mechanical or electrical issue?

[@CamerasLensesEtc]

I don't know, I haven't had lens with this problem before.

[@PeterDempsey-yarglags]

@@CamerasLensesEtc Thanks for the quick answer. I'll investigate with confidence with your video. If I find anything, I'll report back.

[@The.jessedavis]

@@PeterDempsey-yarglagsdid you find anything?

[@josejimenez-ul5ze]

this tutorial was really helpful

[@yonickfrias8799]

Would I have to disassemble the entire lens if I wanted to replace the lens filter frame that is on the front barrel? Part CY1-2823

[@CamerasLensesEtc]

I'm not sure because I haven't done that before, but I think you have to remove the front lens element, then you cn remove the screws underneath it which hold the filter holder, then you have to twist it to release it from the middle cover tubes.

[@LACIKOKA]

Thanks the help, very very tanks . I give an objective free with bad focus, zoom and stabilizator and i finally repair the objective with your help. Thank again. Gow i have got a good objective.

[@CamerasLensesEtc]

You're welcome, and üdvözlet a magyar nézőimnek! :)

[@koalamusik]

How did you solved your problem?

[@cbell7512]

Outstanding!👏

[@CamerasLensesEtc]

Thank you for your comment!

[@ZeidanRacha]

thank you so much for this video, I was able to fix the stuck zoom problem, it was due to one of the 3 main screws being bent so I took it out and now my 2 lens parts are attached by 2 screws only. My new issue is the lens does not auto focus, it only manual focuses. Pls can you tell me if you have another video I can follow to fix this issue? thanks again.

[@CamerasLensesEtc]

When you want to autofocus, what does the lens do? Hunting for focus? A few ideas: - is the USM motor and the focusing lens element is connected with the lever? If you move the manual focus ring, does it twists the focusing lens element inside? - Is the rear cover connected correctly (flex cable if the switch)? When you view the autofocus mode, does the camera shows AF or MF? If you switch the AF/MF switch does it change in the camera?

[@ZeidanRacha]

you are so awesome for such a prompt response thanks! so I went back and opened it up, it turns out the aperture flex cable was not inserted correctly. I fixed that, and the error message 00 went away, and I am now able to change the aperture and it shows on the camera window, and I can see electronic contact again with the lens. What is happening now is, I cannot click a picture in AF, and when it tries to focus, I hear a slow sound, and it cannot auto focus anymore. The answer is yes to all your questions, but I did not understand this part of your question: "- Is the rear cover connected correctly (flex cable if the switch)? On MF I can take photos fine, and I can use the zoom ring to focus, when on AF, I cannot focus or take pictures. I must say too, one of my flex cable covers on the motherboard broke off, so I tried to stick it back on with a piece of tape, do you think I need a new motherboard? do you sell those? Many thanks for your help! Racha

[@CamerasLensesEtc]

- Is the rear cover connected correctly (flex cable if the switch)?: it could happen that the AF/MF switch cable is not connected, and the lens is stuck in MF mode. You can check that by switching the AF/MF switch, and the focusing method in Q screen should change accordingly. As I understand, the problem now is the focusing seems very slow, so the USM motor seems stuck or sticky? Can you confirm that if you move the manual focus ring, the second lens element (counting from the front) is moving with it?

[@ZeidanRacha]

@@CamerasLensesEtc Hey, thank you for your time. Yes when I switch the button from AF to MF, I see that the ONE SHOT disappears inside the Q screen. I can't confirm the second lens element is moving with the manual focus ring, I can't see properly. Do you think I should repeat the video from the start and take the lens apart and start again?

[@CamerasLensesEtc]

In the video at 25:38 I connect the lever of the focusing lens element with the fork of the USM motor. My suspicion is that they are not connected, so the USM motor does not moves the focusing lens element. At 34:00 I check if the manual focusing ring moves the second, focusing lens element: on the side of it there is a part for the lever (so the side of the second lens element is not completely round but there is a part where the lever goes out of it), and by that part you can see if it is moving.

[@S8ntiMag1c]

I think I've lost the piece of metal that you are manipulating from minute 24:44 to 25:27 Is there any chance to look for it on ebay and the name of that piece please ?

[@CamerasLensesEtc]

Here it is: www.ebay.com/itm/Canon-EF-28-135mm-f-3-5-5-6-IS-USM-Lens-Base-Zooming-Guide-Repair-Part-EH1642/372711013114 In general, go to ebay, search for the name of the lens "canon 28 135" in this case, then click on "all" as the section, then choose "Digital camera parts", then sort the list as "price + shipping: lowest first". My guess is that this lane part is the same in the Canon 17-85mm lens, so you might check the ebay search results, maybe it is cheaper.

[@DPoner]

very helpful thank you!

[@CamerasLensesEtc]

Glad it was helpful!

[@holden_tld]

very nice video. i bought a 28-135 today for $20 and it won't zoom past about 115mm, otherwise it's perfect. hopefully i can fix it easily.

[@CamerasLensesEtc]

Good luck! Usually the loose screws which are holding the front lens tube causing this problem... easy fix.

[@VastraPurna]

KEEP IT UP THANKS

[@CamerasLensesEtc]

Thank you too

[@fokkegorter2754]

Super!

[@jomargufo]

Excellent video, i broke my lens but OK... Focus doesn't work.

[@f2tonestudio]

thanks

[@AlanQSmithee]

Crap I didn't watch far enough ahead and missed how I needed to reconnect the little arm attached to the focusing lens. Guess I get to go through the whole process all over again

[@CamerasLensesEtc]

You don't have to disassemble the lens much for that... take it as practice. :)

[@santy512]

genio

[@knallertk8062]

15:20 Youll never be able to put this back together again :-)

[@CamerasLensesEtc]

I did assembled the lens.

[@knallertk8062]

@@CamerasLensesEtc I Know. i saw the rest of the video :-)