Hi, another good video from you :) I have a nikkor 27-70 ed VR which is completely different from yours. I have used the service manual to dismantle the lense until i was at the steps requiring alignment. It is an easy process but be EXTRA CAREFUL with the cables in this unit, their are so thin that they break the solder connection in no time without forcing... the ribbon cables are more robust that this AF button cable. So be careful or you will need to do a soldering jobs to repair the mess. (I dismantled this lense because it was blocked in the 35-50mm range. the problem is easy, one screw getting loose somehow in the zoom mechanism, need to follow all the steps of the manual until you need an alignment , fix the screw, assemble everything and done). My contribution
It's really good that you could fix your lens :-) I think it must be the AF-s VR Nikkor 28-70mm 1:2.8 G ED you mean (there is no AF-s Nikkor 27-70mm....). Some of the AF-s Nikkor lenses have problems with loose screws in the zoom section. I think they miss the screw thread lock on the 3 screws in the very front of the zoom section, I have repaired many AF-s Nikkor 24-70mm 1:2.8 G ED that actually had that problem. You are right that it's not that "hard work" to fix, but of course one have to take good care of the flex cables, and NOT working too close to the GMR sensor unit and the magnetic GMR focus tape. Cheers Kenneth
Video @ 7:33 "a bit fragile" ? Talk about an understatement ! - I wonder how many folks out there became brave enough to follow this video and ended up tearing the "fragile" flex ?
hi. your video looks magic. your skill and this video is great. recently, i tried to repair my nikon af-s 70 300 vr lens but when i reassembled lens, focus hunting trouble happened. i dont know why but now i think your video may helpful for me. but... did you think contamination could be happen by just touching GMR unit? (i used latex glove..) i didnt touched magnetic tape, and GMR looks clean..
thank you so much! I was thinking of buying a new lens after my auto focus stopped working on my lens. I notice through the focus scale view window, this type of felt like looking string (sealer or washer?) floating around. With your detailed instructions, I was able to get in the lens remove that floating material. it seems that sealer had some gray lube went everywhere which I had to clean. My lens is now auto focusing! thank you!!! I have one question. During your instruction I did not notice where that felt like looking sealer or washing came from. what could that possibly be, and should I be worried?
I have a same lens and had the same issue and Nikon charged me half a grand to replaced the SWM. Now the manual focus is stiff and Nikon wanted another half a grand to have the 2 year old SWM replaced. The lens works well except the manual focal is still, is there a way to fix? Thanks.
Thanks for the video. My lens was having problem autofocusing, but at the end it manages to autofocus. Now it reached a stage where it is completely not being able to autofocus at all. I took it to Nikon dealer and he said the motor is most likely the cause and needs to be replaced and never mentioned the possibility of being dirty. The dealer said that if it were dirty, it should at least make some noise when it tries to autofocus. What do you think? Any help please
Hi Kenneth, I got same lens and want to ask you one thing. As you have much more experience than me in lens repair, I need some help. I borrow my lens to other and he hit front edge of the zoom which is moving in and out when you zooming, may be he drop it without lens hood on it. Now I have blurry images on one half of frame. I'm not sure what can be a problem. May be he damaged or bend screws which lead helicoid parts inside or focus coupling key is distorted?
What you're cleaning is not magnetic, it is just plastic with numbers on it. The magnetic part is the metal ring the GMR unit (square silver thing) is resting on under the numbers.
Hi Mike, Thanks for this, I got a very cheap 24-120 f4 as the zoom ring was 180 degrees out and stuck,I stripped it and got it working but the focus was hunting badly and I put it down to the two wires I soldered in to replace a broken ribbon going from CB to motor but after watching this stripped it again and cleaned all the tracks and the "tape head" and after reassembly working great, so thanks. PS are you Norwegian? Cheers Chris
I hope you can answer my question! If the cause of the problem is magnetic encoder tape, does the lens make noise when it tries to focus (focus hunting)?
Well, it could be the SWM focus motor that is on the way to worn out, sinces the capacitive painting inside the motor is on the way to worn out (new motor..) (it's what I would guess)
It could be a dirty magnetic strip, or if you have touched the magnetic strip with a magnetic screw driver (it will damage the info on magnetic strip). It could also be a bad or broken wire, a bad soldering.
Hi, can you make video how to correct focus on one side of focal length. I fine tune my 24-70 on 50mm and its not good on 24mm, if I fine tune on 24mm it is soft on 50mm and 70mm. Thanks
I would think you should maybe change one, or take out one of the very thin washers that sit under the bajonet, and in that way change the "micro adjustment". It's just an idea because many lenses are adjusted in that way in the factory. I have no (0) idea how much it will help, but it would be a simple fix to see if it could work. You need to take good care of the flex cables, and specialy the one from the bajonet to the circuit board.Take a closer Look at page D6 - D7 in the repair manual. Here you can get the repair manual: arcticwolfs.net/ Cheers Kenneth
You never disconnected the focus brush under the focus ring in the video You never took the zoom key off the zoom ring These are things you missed in the video
Really useful helpful video, followed the steps exactly and now my 24-70 g is back in working order - many thanks!
That's really great Stephen :-)
Hi, another good video from you :)
I have a nikkor 27-70 ed VR which is completely different from yours.
I have used the service manual to dismantle the lense until i was at the steps requiring alignment. It is an easy process but be EXTRA CAREFUL with the cables in this unit, their are so thin that they break the solder connection in no time without forcing... the ribbon cables are more robust that this AF button cable.
So be careful or you will need to do a soldering jobs to repair the mess.
(I dismantled this lense because it was blocked in the 35-50mm range. the problem is easy, one screw getting loose somehow in the zoom mechanism, need to follow all the steps of the manual until you need an alignment , fix the screw, assemble everything and done).
My contribution
It's really good that you could fix your lens :-)
I think it must be the AF-s VR Nikkor 28-70mm 1:2.8 G ED you mean (there is no AF-s Nikkor 27-70mm....).
Some of the AF-s Nikkor lenses have problems with loose screws in the zoom section.
I think they miss the screw thread lock on the 3 screws in the very front of the zoom section, I have repaired many AF-s Nikkor 24-70mm 1:2.8 G ED that actually had that problem.
You are right that it's not that "hard work" to fix, but of course one have to take good care of the flex cables, and NOT working too close to the GMR sensor unit and the magnetic GMR focus tape.
Cheers
Kenneth
Thank you very much mike! I've repaired my Af-s 24-70 using this video turorial. :)
WOW, that's really good Jean.
Video @ 7:33 "a bit fragile" ? Talk about an understatement ! - I wonder how many folks out there became brave enough to
follow this video and ended up tearing the "fragile" flex ?
Thank you, do you have a video on fixing the autofocus Nikon 400 mm 2.8 AF-S lens? Thanks,
Thank you ,I have repair my 24 70 for the same problem!
hi. your video looks magic. your skill and this video is great.
recently, i tried to repair my nikon af-s 70 300 vr lens but when i reassembled lens, focus hunting trouble happened. i dont know why but now i think your video may helpful for me.
but... did you think contamination could be happen by just touching GMR unit? (i used latex glove..) i didnt touched magnetic tape, and GMR looks clean..
Most sources, like lens rentals say if you touch a GMR sensor with ANYTHING it will kill it rendering it useless, so how does one change a GMR sensor?
thank you so much! I was thinking of buying a new lens after my auto focus stopped working on my lens. I notice through the focus scale view window, this type of felt like looking string (sealer or washer?) floating around. With your detailed instructions, I was able to get in the lens remove that floating material. it seems that sealer had some gray lube went everywhere which I had to clean. My lens is now auto focusing! thank you!!!
I have one question. During your instruction I did not notice where that felt like looking sealer or washing came from. what could that possibly be, and should I be worried?
I have a same lens and had the same issue and Nikon charged me half a grand to replaced the SWM. Now the manual focus is stiff and Nikon wanted another half a grand to have the 2 year old SWM replaced. The lens works well except the manual focal is still, is there a way to fix? Thanks.
Thanks for the video. My lens was having problem autofocusing, but at the end it manages to autofocus. Now it reached a stage where it is completely not being able to autofocus at all. I took it to Nikon dealer and he said the motor is most likely the cause and needs to be replaced and never mentioned the possibility of being dirty. The dealer said that if it were dirty, it should at least make some noise when it tries to autofocus. What do you think? Any help please
Any comment or help on what I said!!!!
Hi,
I heard that the focus ring whistles also in your lens, do you know how to solve this problem? By cleaning some parts?
Thanks for the video !
The orbital motor needs to be replaced; no cleaning or lube solves this very common 'mileage' issue.
* "Mileage" = Worn Out...
Hi Kenneth,
I got same lens and want to ask you one thing. As you have much more experience than me in lens repair, I need some help. I borrow my lens to other and he hit front edge of the zoom which is moving in and out when you zooming, may be he drop it without lens hood on it. Now I have blurry images on one half of frame. I'm not sure what can be a problem. May be he damaged or bend screws which lead helicoid parts inside or focus coupling key is distorted?
What you're cleaning is not magnetic, it is just plastic with numbers on it. The magnetic part is the metal ring the GMR unit (square silver thing) is resting on under the numbers.
Hi Mike,
Thanks for this, I got a very cheap 24-120 f4 as the zoom ring was 180 degrees out and stuck,I stripped it and got it working but the focus was hunting badly and I put it down to the two wires I soldered in to replace a broken ribbon going from CB to motor but after watching this stripped it again and cleaned all the tracks and the "tape head" and after reassembly working great, so thanks.
PS are you Norwegian?
Cheers
Chris
Thank's Chris, I'm glad the video could help you. I'm actually from Denmark and my name is Kenneth :-)
Cheers
Kenneth
I hope you can answer my question! If the cause of the problem is magnetic encoder tape, does the lens make noise when it tries to focus (focus hunting)?
Well, it could be the SWM focus motor that is on the way to worn out, sinces the capacitive painting inside the motor is on the way to worn out (new motor..) (it's what I would guess)
thank you great video
Thank you for another great tutorial :)
Does anyone know why my Nikon 24-85mm f/3.5-4.5G keeps hunting after I repaired the zoom function because it has a loosen screw inside?
It could be a dirty magnetic strip, or if you have touched the magnetic strip with a magnetic screw driver (it will damage the info on magnetic strip). It could also be a bad or broken wire, a bad soldering.
Thanks, that was helpful indeed
Hi, can you make video how to correct focus on one side of focal length. I fine tune my 24-70 on 50mm and its not good on 24mm, if I fine tune on 24mm it is soft on 50mm and 70mm. Thanks
I would think you should maybe change one, or take out one of the very thin washers that sit under the bajonet, and in that way change the "micro adjustment". It's just an idea because many lenses are adjusted in that way in the factory. I have no (0) idea how much it will help, but it would be a simple fix to see if it could work. You need to take good care of the flex cables, and specialy the one from the bajonet to the circuit board.Take a closer
Look at page D6 - D7 in the repair manual. Here you can get the repair manual:
arcticwolfs.net/
Cheers
Kenneth
Thanks, I will try when photography season finish. Greetings
Thank you bro!
You never disconnected the focus brush under the focus ring in the video
You never took the zoom key off the zoom ring
These are things you missed in the video
Thank you,
🖤