Canon efs 17 85 service manual

THanks a bunch. Thanks so much!!! Once I started, I thought to try a web search for help, and found this. Could NOT have done it without your help! For those above who were thinking of a new lense, I have my second Tamron. Is the optical quality different than a Canon? By the way, my fixed Canon zooms smoother now and with better control than it did brand new! Note for anyone reading here and still thinking about trying this — it is not for the faint of heart, and easy enough to damage something.

You need mechanical savy—recommend experience with tiny mechanical and electrial— good tools, and steady hands. Study each section carefully before taking the next piece off in order to assist memory in reassembling. I followed it and transfered it to German for those who might find German more easy to follow.

Some aditional pictures were added and another defect repaired. Thanks for the great documantation!! No the objective works fine! Be careful at the reassembling!! Reg Kaufi. First off, thank you to original author, sorted the zoom out after some battling with keeping the inside of the lens clean as the zoom sleeve feel out.

AF stopped working and thanks to Nige for an easy fix, I would have dredded taking it all apart once again. Also, the large ribbon has a black clip which came away from its lugs either side but I still manage to slip it back in to hold the ribbon tight with any repair or modification. I also did the procedure. Thank you very much for the guide. Focus works fine and also the black pin is in the right position, but the focuspoint have moved a little bit foreward.

I have the same problem as BiperX. Someone already find the problem? I really appreciate what some people in the net are doing to help others — i did not dissasemble it yet, but was so happy to find this blog after my locked itself yesterday. Thanks a lot for this great tutorial… worked all fine.. I broke two plastic clips but this seems to be no problem…. A Great tutorial, for which I must thank you, BUT while taking mine apart, a piece of metal has fallen out that is not in your description.

Upon googling, I came across this link: thydzik. Any tips for how to get the metal outer ring and the plastic inner ring back together, while also getting the ribbon in there? Thanks a lot! Move this pin to the outermost position. Summary: failed within 3 years, […]. Thanks so much for this! I managed the repair with no problems and now have a working lens again!!!! My lens is also stuck on 17mm. I sent it to a Canon Approved repair center and they have quoted me. I have only had this lens for just over 2 years and previously had to have the following done for a similar cost: Replace Power Diaphragm Unit.

I am very careful with my camera and lenses and they do not get a huge amount of use. Seems like I have been very unlucky as I was under the impression a lens lasted many years. Thanks very much! My lens works fine again!!!! Smart, useful and well done tutorial. Thank you! To Shireen and anyone else struggling to get the contacts, metal bayonet ring and black pastic piece back together , try it this way…. Screw the contacts assembly back into the metal bayonet ring before trying to press the plastic inner back into place.

Now place the metal ring and contacts back into place on the lens and screw the four screws that hold the bayonet ring onto the lens to semi tight, Now locate and gently press the plastic piece until all four lugs click back into place.

Fully tighten the fours screws and viola! SO much more wiring and a complete disassembly required to fix the exact same problem. One loose screw ruins the zoom function of the lens. My lens jammed at 17mm last week, had to wait a few days for a size 00 Philips to come in the post but fixed my lens tonight. All went well and the lens is better now than before, as the zoom was always a bit wobbly the lens was second hand.

You also need a pair of small electronics type pliars to handle the ribbon cables, but I had those already. Thanks a lot for such a great article. My lens is fully operational again. I felt obligated to leave a comment because this article saved me a bunch of money in repairs. I did exactly as instructed and everything went smoothly.

I tightened the loose screw and put everything back together. After following his instructions, everything ended up working like it should! Thanks all. I postponed this for almost a month, but finally took the time to sit down and do this today. Open then lens in 30 minutes only to find the one troublesome screw missing.

Very upset I assembled it again and then when I stood up the missing screw fell of my lap it was so loose that it fell out without me noticing. Anyway, second time round was much faster and now my lens is perfect again! Thanks, the instructions are great! Does anybody have a suggestion on how to resolve this issue? I thought I was having this same problem, but turns out the little black metal clamp thingie removing it is going further than your tutorial fell off and the two tiny screws that held it in place were SOMEWHERE in the lens.

Yes that last one is important too! Cheap shit screw drivers will hurt your tiny tiny screws. Once you damage a screw on the lens, you might never get it out.

Thanks very much again for this tutorial. Any ideas how this could have happened and how I can fix this? Without this instruction I would not have attempted to fix myself. I also had trouble with the auto focus after reassembling. I should have taken pics, but I moved the focus ring to infinity and the mating part in the end of the lens as you look down into it all the way the the right. The trick is to have the lens retracted to 28mm and slide the focus ring into the lens so when you twist it to lock the cams in place the line indicating zoom will match the 28mm.

When you start the line will be about 1cm the the left of 28mm on the lens. Had exactly the same problem, zoom jammed. I did it! I broke one of the four pins on the black ring in picture four, but it got assembled back successfully. Thanks from me as well. One of the screws had come out completely on mine. Now it looks to be working perfectly.

Saved me the repair bill. You could try taking it apart again and when you can access the manual focus ring, take it off.

Underneath I think there are two bits that move… the part that the manual focus ring sits on, and a little up from that, the part that actually moves the focus scale indicator and I assume allows manual focussing. When I took mine apart, I noticed that in certain positions, the manual focus would move without affecting the scale. Thanks so much. One loose screw was doing it for me. When the problem started, I could tilt the camera just so and reset the zoom.

Eventually it got to the point where not even that worked. I was about to send my lens back to Canon when a quick search turned up this post. Plus it was interesting to take a lens apart. Donation coming your way. Thank you for your concise instructions. However, I have noticed as some others have, that if the lens is just loose and not jammed, you can tighten the loose screws on the barrel by inserting a screw driver through the slots on the barrel underneath the zoom grip.

No new lens for me… yet…. I almost cant tell how pleased i am with your message. Solved the problem in just 10 seconds!!! Read the comments left by all the other users who had exactly the same …. I join in the chorus of praise! Lens is back in working condition and I had no problems with AF or anything else afterwards. Thanks for this post. Saved me a lot of time compared to the full breakdown posted here.

Just to clarify, peel off the rubber from the zoom ring to expose the slots on the side of the lens. See photo attached. This problem is all due to a loose […]. If the head is protruding try pliers. Same problem now at the last stage taking off the last 3 screws, got 1 but the other 2 are buggered. Did you find a solution? Con dos horas de […]. Thank you very much. Gert Jan. Hi, Travis. Thanks for this information, pictures and Blog.

Just recently The lens developed a focus hunt problem. At any zoom position except 17mm the lens would not focus — it would hunt back and forth to try and lock a focus in. The solution was to disassemble the lens and remove the USM motor assembly, turn in over and remove five screws on a retaining ring under which a semi circular focus movement sensor clear plastic sensor with fine lines and an optical lens assembly was found.

A complete clean in alcohol and re-gluing of the semi circular clear plastic optical sensor one end was loose! I have now repaired this lens twice!. Thanks again for sharing all the comment here. I just wanted to thank you for putting this up. This took me under two hours and the lens is as good as new!!

Thanks again…. I know this was posted years ago, but my mm stopped working and this guide has fixed it. Nice work Travis. Does somebody know where to fit the 3 clips which fall out of the barrel when removing the aperture and stabilizer assembly? See attached picture. The clips should go in the empty barrel and then aperture and stabilizer should be re-assembled, however the keep falling out, whatever I do. I too have used this guide to repair the err about one year ago!

I also have your problem with the focus right now! At any zoom position except 17mm the lens just focus hunts! I have already disassembled twice. Any further ideas would be great! Guys you are brilliants! I did the same mistake after fixing stuck zoom. Your post help me to find my mistake why I lost focus function. Thanks a lot , almost threw my lens to garbage. Now it is working fine!!!!!

Hi Travis I had exactly the same problem with my lens and just removed the rubber zoom ring. The slot is smaller than the screw head so you need to angle the screw back in with tweezers. When the screw is tightened apply big dollop of nail polish to head and side. Been fine since. It is really fiddly and requires a few attempts but seems safer than complete disassemble for the fainthearted. Please let me know how to disassemble 18 to It may be similar to this till you get to remove ousode casing.

There are no screws. Please email or fb me. Robin L Poling. After putting the lens back together the auto and manual focus stopped working. If yours have the same issue try to check the focusing pin is in place, as recommended in the article.

I took these pictures showing what the focusing pin is. The focus pin was out of place, so I disarmed the lens again, put the pin back between the two metal parts, and now the lens is working properly. Hi Tom. Have the same problem and suprisingly cannot find the wayout, as if nobody else beside you and me had this very issue. Could you prompt the solution if you coped with the problem. Would be very much obliged. Thank you for this step by step! Fotos, dokumenter og storformat til erhverv og private.

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Tips og teknikker. Del dine lidenskaber med vlogging. Download firmware til dit Canon-produkt. I opened the whole thing up following very specific instructions , and got down to the I'm not going to provide a step-by-step guide to disassembling the mm lens, Upload a Thing! Customize a Thing. Download All Files. Select a Collection. Save to Collection. Tip Designer. Share this thing.