mine is used very little, it doesn't have the problem you solve in this video but the autofocus of mine suffers from "focus slipping" just in vertical position (not horizontal) do you know how to fix it? another minor issue is that the zoom ring is very soft (I don't remember if it has become or has always been) compared to that of other zooms such as the 24-105 or the 70-200 RF do you think it's a problem related to focus slipping?? sorry for the many questions and greetings and thanks from italy
hello petar, i have a problem with my 70-200 4is, i have the focus slipping, i saw a homemade solution with a thickness in the focus ring, i assume it is under the motherboard under the stabilizer, but i can't I figure out how to access it, I can disassemble the stabilizer and zoom ring but not the rest, thanks
Great video!! Do you home made the electric tool to check the motor focus? Is possible if you can share how built one? I started my independent shop in Mexico. Thanks!!
Hi , yes , it is semi-home made. The box is mine and the rest is from Japan. It is very expensive and now is impossible to order it. . May be in the nearest future when the situation is normal.
My friend, I have a lens exactly the same except the focus ring has no hole in it for taking out the screws. How can I access the focus frame rollers this way? I think my lens is much older than this one
I have repaired two lens having same problem. Now I have same lens, same symptons byt the problem is in usm clutch mechanism slipping. Very difficult lens to disassemble down to usm unit!
@@Guoenyi I havent done anything to it, too difficult lens to work on. There are many adjustable collars that must be removed. And after that, lens needs full realignment work.
@@tonskulus Yeah I refrained from opening it myself although I successfully refreshed a 50 f1.4 slipery clutch. In the IS mech looks like something I should not mess with unless I work at Canon lol.
Thank you for making this video! it was exactly what i was locking for! Where to order those Focus Frame rollers?? I can not find anything on the web! Please help!!
Hi Petar, do you have a video in which the focus gets stuck at infinity? I have a Canon 300mm f/4 IS and it gets stuck at infinity zoom, but if I turn the manual focus ring abruptly it will turn and work for a little bit then get stuck at infinity zoom again.
Shafi Subhan hi and thank you for the comment. I don’t have video for this lens model , but the problem is in the USM. You need to disassemble the lens up to this section and then try to find the problem in the motor or in the focus slide . Regards!
Hi, thank you for the comment :) Just that you know - the decorative ring is from plastic - the spanner that you recommend is from metal :) This tool is for old lenses. They are made 99% of metal and this will not scratch the ring, because is made from metal . Regards!
Thank you for the video. It was an easy repair with your help.🤓
I made them from a teflon tube! ) Thank you for the video.
Troitsk vip thank you for the comment:) If you like the video , hit LIKE and subscribe to our channel :)
Hello please can you remember what exactly teflon tube is needed? I mean both diameters internal and outer. Thank you very much.
You make it look easy! 😒😂😍
Does in your case autofocus work ? or both focus options was compromited? and you just glued that broken plastic frame to the bolt???
mine is used very little, it doesn't have the problem you solve in this video but the autofocus of mine suffers from "focus slipping" just in vertical position (not horizontal)
do you know how to fix it?
another minor issue is that the zoom ring is very soft (I don't remember if it has become or has always been) compared to that of other zooms such as the 24-105 or the 70-200 RF
do you think it's a problem related to focus slipping??
sorry for the many questions and greetings and thanks from italy
hello petar, i have a problem with my 70-200 4is, i have the focus slipping, i saw a homemade solution with a thickness in the focus ring, i assume it is under the motherboard under the stabilizer, but i can't I figure out how to access it, I can disassemble the stabilizer and zoom ring but not the rest, thanks
what is the lens mount device ?/
Great video!!
Do you home made the electric tool to check the motor focus? Is possible if you can share how built one? I started my independent shop in Mexico.
Thanks!!
Hi , yes , it is semi-home made. The box is mine and the rest is from Japan. It is very expensive and now is impossible to order it. . May be in the nearest future when the situation is normal.
My friend, I have a lens exactly the same except the focus ring has no hole in it for taking out the screws. How can I access the focus frame rollers this way? I think my lens is much older than this one
Hi you need to disassemble the whole lens almost :)
@@DIGISERVICEBG oh okay, thanks for the help
My lens soft focus after repair, any solution?
HI send the lens to us and we can fix it for a very reasonable price. Thank you!
Do you have video for repair same issue for 70-200 f2.8 IS mk1?
Hi, yes, search it in the channel.
I have repaired two lens having same problem. Now I have same lens, same symptons byt the problem is in usm clutch mechanism slipping. Very difficult lens to disassemble down to usm unit!
Does ring type USM have a clutch system at all?
@@Guoenyi yes.
@@tonskulus What did you do to the clutch? Did you need to re-calibrate IS?
@@Guoenyi I havent done anything to it, too difficult lens to work on. There are many adjustable collars that must be removed. And after that, lens needs full realignment work.
@@tonskulus Yeah I refrained from opening it myself although I successfully refreshed a 50 f1.4 slipery clutch. In the IS mech looks like something I should not mess with unless I work at Canon lol.
If my auto and manual focus slip at close distance, do you think this could be the same problem? Thanks.
brian liou hi yes may be , but check it by disassembly:)
Thank you for making this video! it was exactly what i was locking for! Where to order those Focus Frame rollers?? I can not find anything on the web! Please help!!
Part-No. e.g. "YA2-4183-000-400"
Did you ever find out...I suspect mine is the same as I can press down on the front element and it moves
@@prove-it1001 Thank you, it was a perfect fit.
Hi Petar, do you have a video in which the focus gets stuck at infinity? I have a Canon 300mm f/4 IS and it gets stuck at infinity zoom, but if I turn the manual focus ring abruptly it will turn and work for a little bit then get stuck at infinity zoom again.
Shafi Subhan hi and thank you for the comment. I don’t have video for this lens model , but the problem is in the USM. You need to disassemble the lens up to this section and then try to find the problem in the motor or in the focus slide . Regards!
Where can I get a replacement focus frame roller? I looked up the part number from a comment but still can’t find it.
Hi search it on Alixpress or Ebay.
Where can I buy new screws?
HI, search it on Alixpress.
Why toothpicks ? You can order once of those: www.ebay.de/itm/Eg-Langlebig-Edelstahl-DSLR-Kamera-Objektiv-Linsen-Reparatursatz/264247363359
Hi, thank you for the comment :) Just that you know - the decorative ring is from plastic - the spanner that you recommend is from metal :) This tool is for old lenses. They are made 99% of metal and this will not scratch the ring, because is made from metal . Regards!