Very detailed explanation. I just purchased a lens with haziness. I’ll put your video to good use and bring it back to sharpness that I’d expect from an L lens. I thank you for making this video 🌟
Thankyou!!! You just saved the day for us. VIDEO SAVED THE DAY! Had lens that needed repair and we could not afford the down time. I used the info I needed and found and fixed the two loose screws that were failing.
THANK YOU !!!!! WORKED 100% take your time when disassembling my zoom stopped working once i took it apart i found a screw that came unattached and was stopping my zoom, i watched this video and took my time step by step and fixed it free plus cleaned my lens, Thank you !!!!!!!! saved me $250 service fee subbed for sure and thumbs up.
Which two screws were they? Did you need to disassemble the zoom mechanism? I just bought one for $40 with a jammed zoom, and going by the number of comments on this I'm guessing/hoping it's the same 😊 Is it possible to say at which time in the video feature your loose screws? I'm pedantic because I ruined a 28-70 f2.8l by forgetting where the zoom was aligned! I want to avoid a repeat... Thanks a million ☺️
@@samuelsquires423 my zoom mechanism just got unattached from the outer zoom ring - so around 5:01 he shows the screws that came loose on my lens. Hopefully that helps!
Was curious on what was catching my zoom to not zoom in and out smoothly. Noticed a flat head screw that was catching and rubbing. Screwed it down and problem fixed! Thanks for having an easy-to-follow tutorial on disassembling this lens. Cheers!
I have to say THANKYOU for your video. I bought a 'non working' F2.8 lens for AUS$300 (About USD$200) and fixed it in about 10 min by putting the focus screws back after they had fallen out. I now have a fabulous addition to my lens stable and saved a fortune! (If you have a fix for a non power up of a 7D I'd appreciate it as well, (well actually my daughter will as it will be her camera) ;-) )
Hi there. I fixed my lens issue in a way thanks to your help. I got to 6:34 and I got two out of the three screws off. But then, the last screw was not moving and it started to lose its grooves for the driver. It was getting worse so I decided to leave it until I buy a better driver with a grip on it. I did however get out what I needed to get out which was a 9:17 plastic piece and screw that had come loose and was beginning to jam my lens. I can fix that once I can get the other screw that is threaded off. But do you know where I can get a new or replacement screw for the ones at 6:34? I wanna have one ready at hand to replace the worn out one. Seems like a hard one to get and no random screw will do the job. Do you know where I can order one or two of these, or if just a random replacement works from some other device or I can order online? Any help appreciated. Cheers.
Best comment! Very helpful. I'm wondering if you remember how you put those plastic bits and screws it? Did you need to strip it down more, and if so did you mark the position anywhere to keep it calibrated? Thanks a million! 😊
My lens would squeak every time I try to zoom to a certain point. Thanks to your video I was able to take my lens apart and fix the problem. Thank you!!
This is one outstanding How-To video and I thank you for posting it! My 16-35 took a brief, but hopefully not fatal, dip in the ocean surf, and I now need to try to clean it up following your instructions. Before doing that, however, I'm in the process of editing and uploading your video RUN BACKWARDS to demonstrate the 16-35mm ASSEMBLY procedure! Once done, I'll post it on TH-cam, give you the credit, and follow up here to share the link with you and others. Obviously, since the video is backwards, there will be no sound, just some elevator music. Anyone using my assembly video would want to first watch yours so they have a frame of reference and the steps will make more sense. Wish me luck, and thank you again - as in VERY MUCH!
Arthur I see you are using a precision screwdriver (obviously works but doesn't look to be a specialist product) what precision set would I need to buyy to take apart these lenses,I was told JIS but can't buy them anywhere in UK
can you remove the front filter barrel without starting from the rear? I have a damaged (bent) Barrel so I cant get the filter off but the replacement barrel is cheap... how hard is it to replace?
Hey Authur, thanks for the run down.... I recently dropped my Canon 16-35... no exterior damage, but I notice the focus isn't reliable. Non-responsive to the focus ring in manual and auto focus... it randomly kicks in then good to go.... not the best state for event shooting. I am gun shy to disassemble, so I will send it to Canon to make it right. It nice to know at least what it looks like disassembled.... thanks. - Mike
Hey! I've got this lens, AF motor isnt spinning (it had some beer spilt on it) although the focus confirmation does work. My thought was to try and take it apart to clean/fix/replace the motor. You have any thoughts on how to test whether its the motor or the connections/pcb that are preventing it from focusing? (my thought is that if focus confirmation is working, that the PCB is likely okay). Awesome video.
Question cause I hear a rattling noise in my lens and the zoom ring isnt working anymore, Can those screws and gold sleeves fall inside? They quoted me 4 week repair, I think Im capable of doing it on my own Thank you
Thank you. I have a bent front lens barrel. The lens functions perfectly, but I can't use my filters. I found a used front barrel in china for $119. USD on Ebay, but I want to attempt to straighten it first...
Hi, after disasambling and re-asambleing the lens, I'd strongly recomend to be EXTRA careful when removing the focusing motor assembly 08:28 in the video, I did that and ripped half of a ribbon flex cable, so now I have a clean, fungus free lens that won't focus, (on the interne you can find $100 focusing assembly's, so its not too bad), but beware when putting out and in this piece. Use this japanese URL as guide (you have the full assembly drawn and with photos): wenku.baidu.com/view/04af1c7a31b765ce050814c4.html put it on the translate google to english and there is a continue reading to have the full parts list.
Hi, I just need to remove the front metal part which holds filters. I actually have 16-35 f2.8 II version. Do I just unscrew the screws under the focusing ring? Or do I have to take it all apart like you did? Thank you very much.
Olá! Eu tive um problema com a minha lente 18mm 55mm da NIKON D3100 e agora da erro: objetiva não fixada. Nisso um colega meu abriu a lente é percebeu que um fiozinho preto estava solto você faz manutenção de lentes Assim?
In case anyone is wondering, you CAN remove the three small screws under the focus ring to remove the front filter mount. ONLY remove the ones without the plastic ring around them. You will have to pull it a bit because the plastic ring on the inside up against the lens is clipped in and takes a bit to get out. Mine didn't break but be careful.
I removed those but still can't get the front piece off. I feel I have to remove the labeled ring that surrounds the end glass first. How did you get that part off?
For others reading, for my 17-35 L, I took off the label ring which was glued on, then underneath were two pin holes in the lens surrounds (the bit Arthur was missing) that allowed me to *unscrew* it. It actually held the outermost lens element in place so be careful that doesn't fall out. Then the lens cap ring slides easily off after the three screws mentioned above are removed.
Can anyone tell me how difficult it is to replace the front filter barrel on the 16-35 f/4? I have one that took a tumble and everything is good except for a stuck filter because the front barrel is slightly dented... only $50 to replace the barrel to my most pleasant surprise... is it something I can do myself? I'm fairly good with technical stuff
You skipped the part as to how you got he front "name plate" off of the front of the lens which seems to be needed in order to take the whole larger front piece off.
@@ArthurR well darn, it's keeping the outer front element on and there's no screws visible. There are 2 very small holes on either side of the plastic around the glass, facing forward but not sure what to do with those.
@@ArthurR any chance you could take a closeup photo of the front of your lens? That might help me understand how my face plate is connected so I can remove it. Dangrove88@gmail.com
My lens has a lot of play in the body. So I called Canon service center and was told "Sir we don't service that lens any longer". I asked why and the lady said "Sir that lens is 20 yrs old. You got you money's worth just but another lens". Why?? There is nothing wrong with the glass. I followed your video but I didn't find the missing screw. But to my surprise the lens is back to normal. Thanks for the video.
Is this different then the 16-35MM 2.8 II ? Mine looks different. Mine dropped from 2 ft snapped off the lens from the camera in two pieces. A lot of people complaining how cheaply it's made for a Canon Professional $1, 600 lens. I put my camera on the back seat floor of the car I opened the back door and was on the edge and fell out. After I put it in it must of slid against the door and boom when I opened the door. I almost had a stroke when I saw it in two pieces on my 5D MKIII. Lens laying away from the camera. Luckily the MKIII didn't have a scratch on it My lens broke rite off the camera. Circuit board ribbon cable ripped off the board a black wire hanging I imagine was soldered to the pc board.. No damage to the mount ring or camera except for a loose screw from the lens breaking off. The circuit board has a broken coil on it. I can't believe the cheap build quality. I took it apart somewhat but afraid to go any further. You video really helped but I think my 16-25 2.8 II is different 4 tiny screws into very hard plastic snapped off. Cheaply made! Anyone have any ideas how to fix this. Should I try doing it myself or send it out or anyone have any experience they can share with me? If I send to Canon they will rape me on a repair. The lens is like a 1 yr old like new.
I also have the same lens and got the same issue. I lost two ribbon cables though. Need to replace the auto focus assembly. Were you able to find any instruction you can share on how to replace it? Thanks!
Can anyone here share how they got the front labeled plate off? The lens in this video didn't have one? I can't take the front, outer element off without removing the labeled part which surrounds the end glass.
remove the focusing rubber, rotate the ring to align 3 screw holes, remove the screws and pull the metal front ring housing, it will take out the plastic snap in cover as well.
hey man. i took it passed the point of where you said you shouldn't. have you ever done this? how the hell do i put this thing back together?! haha. I'm about to bring it to a local canon facility all in individually labeled bags. I took it apart because my focus wasn't pulling at all. micro adjustments did me nothing. and i didn't want to pay canon 400 dollars. now i wish i had :/
+Shawn Luginbuhl I have. It's a bit of a puzzle after. I assume you have taken it apart down to the aperture blades? That is the toughest part of reassembly - getting all of the aperture blades overlapping correctly and facing the correct direction while connected to the outer ring and functioning properly. Once you have that, take a look at the details in the video and reassemble the lens based on the paused video. It is possible, you just have to have patience. Also note you shouldnt touch the aperture blades with your fingers or let any oil or dust on them.
Thanks man. I think i got the aperture assembly (the smallest of the barrels) put back together last night. Hopefully the lenses are clean enough. I never touched the aperture blades, but i did notice that through the motion of it it didn't really close up as much as i expected it would. I guess i always thought those blades closed up to almost a pinpoint. they really only close about 50% of the lens they cover. I've got my fingers crossed. worst comes to worst hopefully the parts can be sent to Canon for cleaning and re-assembly haha. Your video is great by the way. Thanks for that.
The video is continuously out of focus. This is very annoying. Usually the cameras in a poor lighted environment use automatically a bigger aperture for more light into the sensor. However with bigger aperture, the depth of field is shallow and the autofocus struggles to operate. A better solution the use of more sources of light in the room and the manual selection of a much smaller aperture. The depth of field will be deeper and autofocus will be more efficient.
Nice video thanks...I subbed. Was just wondering. Do I need to disassemble as you have shown to merely replace the Len Distance Scale ? Or can it be removed externally ? (ps: Mine is cracked and needs replacement)
Very detailed explanation. I just purchased a lens with haziness. I’ll put your video to good use and bring it back to sharpness that I’d expect from an L lens. I thank you for making this video 🌟
Thankyou!!! You just saved the day for us. VIDEO SAVED THE DAY! Had lens that needed repair and we could not afford the down time. I used the info I needed and found and fixed the two loose screws that were failing.
THANK YOU !!!!! WORKED 100% take your time when disassembling my zoom stopped working once i took it apart i found a screw that came unattached and was stopping my zoom, i watched this video and took my time step by step and fixed it free plus cleaned my lens, Thank you !!!!!!!! saved me $250 service fee subbed for sure and thumbs up.
I just bought a used one for $40 with a stuck zoom. Hopefully I can get a similar result 😊
Thank you this helped me fix the broken zoom on my lens, turns out it was just those 2 pesky screws that had fallen out
Which two screws were they? Did you need to disassemble the zoom mechanism? I just bought one for $40 with a jammed zoom, and going by the number of comments on this I'm guessing/hoping it's the same 😊
Is it possible to say at which time in the video feature your loose screws?
I'm pedantic because I ruined a 28-70 f2.8l by forgetting where the zoom was aligned! I want to avoid a repeat...
Thanks a million ☺️
@@samuelsquires423 my zoom mechanism just got unattached from the outer zoom ring - so around 5:01 he shows the screws that came loose on my lens. Hopefully that helps!
@@caitlynmackie5201 thanks 🙏
Hi, after taking it apart like you did, do we need to do some sort of lens calibration/alignment so that it will be pin sharp again?
Was curious on what was catching my zoom to not zoom in and out smoothly. Noticed a flat head screw that was catching and rubbing. Screwed it down and problem fixed! Thanks for having an easy-to-follow tutorial on disassembling this lens. Cheers!
I have to say THANKYOU for your video. I bought a 'non working' F2.8 lens for AUS$300 (About USD$200) and fixed it in about 10 min by putting the focus screws back after they had fallen out. I now have a fabulous addition to my lens stable and saved a fortune! (If you have a fix for a non power up of a 7D I'd appreciate it as well, (well actually my daughter will as it will be her camera) ;-) )
Which screws were they? Is it possible to tell me which moment in the video they feature?
Thanks ❤
Thanks for this. My len mount snapped off of the barrel, so now I know it's going to be costly to even just buy the pieces. Great video.
Did you end up fixing lens mount? Same just happened to me and wondering what I am looking at.
Hi there. I fixed my lens issue in a way thanks to your help. I got to 6:34 and I got two out of the three screws off. But then, the last screw was not moving and it started to lose its grooves for the driver. It was getting worse so I decided to leave it until I buy a better driver with a grip on it. I did however get out what I needed to get out which was a 9:17 plastic piece and screw that had come loose and was beginning to jam my lens. I can fix that once I can get the other screw that is threaded off. But do you know where I can get a new or replacement screw for the ones at 6:34? I wanna have one ready at hand to replace the worn out one. Seems like a hard one to get and no random screw will do the job. Do you know where I can order one or two of these, or if just a random replacement works from some other device or I can order online? Any help appreciated. Cheers.
Best comment! Very helpful.
I'm wondering if you remember how you put those plastic bits and screws it? Did you need to strip it down more, and if so did you mark the position anywhere to keep it calibrated?
Thanks a million! 😊
My lens would squeak every time I try to zoom to a certain point. Thanks to your video I was able to take my lens apart and fix the problem.
Thank you!!
Loose screws?
This is one outstanding How-To video and I thank you for posting it! My 16-35 took a brief, but hopefully not fatal, dip in the ocean surf, and I now need to try to clean it up following your instructions. Before doing that, however, I'm in the process of editing and uploading your video RUN BACKWARDS to demonstrate the 16-35mm ASSEMBLY procedure! Once done, I'll post it on TH-cam, give you the credit, and follow up here to share the link with you and others. Obviously, since the video is backwards, there will be no sound, just some elevator music. Anyone using my assembly video would want to first watch yours so they have a frame of reference and the steps will make more sense. Wish me luck, and thank you again - as in VERY MUCH!
You should have written your comment backwards
Very helpful 🙌🏽 thanks
Arthur I see you are using a precision screwdriver (obviously works but doesn't look to be a specialist product) what precision set would I need to buyy to take apart these lenses,I was told JIS but can't buy them anywhere in UK
can you remove the front filter barrel without starting from the rear? I have a damaged (bent) Barrel so I cant get the filter off but the replacement barrel is cheap... how hard is it to replace?
Where did you find a new barrel? I have the same issue
Hey Authur, thanks for the run down.... I recently dropped my Canon 16-35... no exterior damage, but I notice the focus isn't reliable. Non-responsive to the focus ring in manual and auto focus... it randomly kicks in then good to go.... not the best state for event shooting. I am gun shy to disassemble, so I will send it to Canon to make it right. It nice to know at least what it looks like disassembled.... thanks. - Mike
Hi I have this lens and the image is very soft, in 35 f2.8 looks very blurred ,which could the problem be?
Can it focus manually?
Hey! I've got this lens, AF motor isnt spinning (it had some beer spilt on it) although the focus confirmation does work. My thought was to try and take it apart to clean/fix/replace the motor. You have any thoughts on how to test whether its the motor or the connections/pcb that are preventing it from focusing? (my thought is that if focus confirmation is working, that the PCB is likely okay). Awesome video.
Question cause I hear a rattling noise in my lens and the zoom ring isnt working anymore, Can those screws and gold sleeves fall inside? They quoted me 4 week repair, I think Im capable of doing it on my own Thank you
Hi! I need to replace the rubber seal from the back of the lens. Is it necessary to put some kind of glue on it?
Thank you. I have a bent front lens barrel. The lens functions perfectly, but I can't use my filters. I found a used front barrel in china for $119. USD on Ebay, but I want to attempt to straighten it first...
Hi, after disasambling and re-asambleing the lens, I'd strongly recomend to be EXTRA careful when removing the focusing motor assembly 08:28 in the video, I did that and ripped half of a ribbon flex cable, so now I have a clean, fungus free lens that won't focus, (on the interne you can find $100 focusing assembly's, so its not too bad), but beware when putting out and in this piece. Use this japanese URL as guide (you have the full assembly drawn and with photos): wenku.baidu.com/view/04af1c7a31b765ce050814c4.html put it on the translate google to english and there is a continue reading to have the full parts list.
Hi, I just need to remove the front metal part which holds filters. I actually have 16-35 f2.8 II version. Do I just unscrew the screws under the focusing ring? Or do I have to take it all apart like you did? Thank you very much.
See my comment above, you can do this by itself with just 3 screws.
Any one know how to dismantle the canon lens 16-35mm f4 ..I Stuck at the the AF unit .No screws found to take it off.
Thanks
Good job, I just got this as a project lens! Can you list the steps from 1 to 458 in the comments section please?
Lol it is complicated! Don't try this at home unless you are confident you can keep track of a few dozen tiny screws.
+TechnologyMafia My apartment got flooded a week ago and the lens appears to have mud inside of it. I'm going to go for it. Wish me luck!
+Kevin Quintero Good luck! How did it go?
Here, 6 months later I gave it a try. I went further than you did and didn't keep track of where everything went and what order.. stuck haha
Olá! Eu tive um problema com a minha lente 18mm 55mm da NIKON D3100 e agora da erro: objetiva não fixada.
Nisso um colega meu abriu a lente é percebeu que um fiozinho preto estava solto você faz manutenção de lentes Assim?
In case anyone is wondering, you CAN remove the three small screws under the focus ring to remove the front filter mount. ONLY remove the ones without the plastic ring around them. You will have to pull it a bit because the plastic ring on the inside up against the lens is clipped in and takes a bit to get out. Mine didn't break but be careful.
I removed those but still can't get the front piece off. I feel I have to remove the labeled ring that surrounds the end glass first. How did you get that part off?
@@danielgrove6087 Just pull it is slightly glued around the lens ring
For others reading, for my 17-35 L, I took off the label ring which was glued on, then underneath were two pin holes in the lens surrounds (the bit Arthur was missing) that allowed me to *unscrew* it. It actually held the outermost lens element in place so be careful that doesn't fall out. Then the lens cap ring slides easily off after the three screws mentioned above are removed.
Can anyone tell me how difficult it is to replace the front filter barrel on the 16-35 f/4? I have one that took a tumble and everything is good except for a stuck filter because the front barrel is slightly dented... only $50 to replace the barrel to my most pleasant surprise... is it something I can do myself? I'm fairly good with technical stuff
Thank you :-).
Hi I can’t remove the zoom ring (@6:00 in the video) have you done something to do so?
Mine doesn't either lol
You skipped the part as to how you got he front "name plate" off of the front of the lens which seems to be needed in order to take the whole larger front piece off.
My lens didnt have that piece, it was missing.
@@ArthurR well darn, it's keeping the outer front element on and there's no screws visible. There are 2 very small holes on either side of the plastic around the glass, facing forward but not sure what to do with those.
@@ArthurR any chance you could take a closeup photo of the front of your lens? That might help me understand how my face plate is connected so I can remove it. Dangrove88@gmail.com
thank you. now i fix my lens
My lens has a lot of play in the body. So I called Canon service center and was told "Sir we don't service that lens any longer". I asked why and the lady said "Sir that lens is 20 yrs old. You got you money's worth just but another lens". Why?? There is nothing wrong with the glass. I followed your video but I didn't find the missing screw. But to my surprise the lens is back to normal. Thanks for the video.
I have a ton of dust in my lense. How?????
Is this different then the 16-35MM 2.8 II ? Mine looks different. Mine dropped from 2 ft snapped off the lens from the camera in two pieces. A lot of people complaining how cheaply it's made for a Canon Professional $1, 600 lens. I put my camera on the back seat floor of the car I opened the back door and was on the edge and fell out. After I put it in it must of slid against the door and boom when I opened the door. I almost had a stroke when I saw it in two pieces on my 5D MKIII. Lens laying away from the camera. Luckily the MKIII didn't have a scratch on it My lens broke rite off the camera. Circuit board ribbon cable ripped off the board a black wire hanging I imagine was soldered to the pc board.. No damage to the mount ring or camera except for a loose screw from the lens breaking off. The circuit board has a broken coil on it. I can't believe the cheap build quality. I took it apart somewhat but afraid to go any further. You video really helped but I think my 16-25 2.8 II is different 4 tiny screws into very hard plastic snapped off. Cheaply made! Anyone have any ideas how to fix this. Should I try doing it myself or send it out or anyone have any experience they can share with me? If I send to Canon they will rape me on a repair. The lens is like a 1 yr old like new.
Yes, outer casing parts are similar but the mechanism is different especially on the focus section, 16-35 mk i is almost the same as 17-40 f4
I also have the same lens and got the same issue. I lost two ribbon cables though. Need to replace the auto focus assembly. Were you able to find any instruction you can share on how to replace it?
Thanks!
It 'is a greate video. but I can not remove front lens.
how to remove the name plate???
Can anyone here share how they got the front labeled plate off? The lens in this video didn't have one? I can't take the front, outer element off without removing the labeled part which surrounds the end glass.
remove the focusing rubber, rotate the ring to align 3 screw holes, remove the screws and pull the metal front ring housing, it will take out the plastic snap in cover as well.
Any luck finding? I have the same Q.
I feel like wearing white gloves or some sort of glove I general would be essential.
hey man. i took it passed the point of where you said you shouldn't. have you ever done this? how the hell do i put this thing back together?! haha. I'm about to bring it to a local canon facility all in individually labeled bags. I took it apart because my focus wasn't pulling at all. micro adjustments did me nothing. and i didn't want to pay canon 400 dollars. now i wish i had :/
+Shawn Luginbuhl I have. It's a bit of a puzzle after. I assume you have taken it apart down to the aperture blades? That is the toughest part of reassembly - getting all of the aperture blades overlapping correctly and facing the correct direction while connected to the outer ring and functioning properly. Once you have that, take a look at the details in the video and reassemble the lens based on the paused video. It is possible, you just have to have patience. Also note you shouldnt touch the aperture blades with your fingers or let any oil or dust on them.
Thanks man. I think i got the aperture assembly (the smallest of the barrels) put back together last night. Hopefully the lenses are clean enough. I never touched the aperture blades, but i did notice that through the motion of it it didn't really close up as much as i expected it would. I guess i always thought those blades closed up to almost a pinpoint. they really only close about 50% of the lens they cover. I've got my fingers crossed. worst comes to worst hopefully the parts can be sent to Canon for cleaning and re-assembly haha. Your video is great by the way. Thanks for that.
The video is continuously out of focus. This is very annoying. Usually the cameras in a poor lighted environment use automatically a bigger aperture for more light into the sensor. However with bigger aperture, the depth of field is shallow and the autofocus struggles to operate. A better solution the use of more sources of light in the room and the manual selection of a much smaller aperture. The depth of field will be deeper and autofocus will be more efficient.
first get right camera for you your video first......
Nice video thanks...I subbed. Was just wondering. Do I need to disassemble as you have shown to merely replace the Len Distance Scale ? Or can it be removed externally ? (ps: Mine is cracked and needs replacement)
What did you clean the inside glass with?