This is a well-done video. You can save some time and still get rid of the oil by removing the diaphragm assembly (2:00) and submerging it complete in 91% isopropyl alcohol. Work the blades open and closed a few dozen times. Lift out the assembly and blow it dry with canned air - do this with the blades open, closed, and partially closed. Repeat the entire process. Let the unit air-dry fully for several minutes. The diaphragm blades should now be 100% clean and dry. I've done it this way several times with success.
Yes this works well. You get paranoid at first that it won't be fully dry but given enough time and caution it will fully dry out. If it's in a colder part of the year, you could also put the assembly on top of a radiator or heater if you have one running. I have dried them off, then to make fully sure, placed the mechanism inside a clear plastic bag and put back onto the top of a radiator to check for any condensation inside the plastic bag but it has always been fine with no traces of moisture left. Works for some other lenses too such as Carl Zeiss Jena 135mm MC
Thank you for making the video, I was able to fix a lens I got from goodwill. The blades were very oily and didn't come out at all. It was pretty easy to do, but the last blade was difficult and it took a few trials and I came up with quite a few new swear words during the process...It was much easier after I put a pad underneath the ring to keep it in place.
Thank you so much for the video :) I've been able to access and clean the aperture blades thanks to you. It's a shame however that the "reassembly part" of the video be that accelerated, as it may be useful for the viewers. Great vid anyway !
Thank you for the help! I was afraid to open completely the blades,so i dipped them in the liquid for a while. Fortunately it worked for the moment. If it stucks again in future,then i'll have to follow your instructions! :) Only problem is, that even though the blades function flawlessly out of the lens, when mounted, the aperture don't go past f/8 ... Not sure if i do something wrong or if its the lens fault, cause the lens was already stuck at f/1.4 when it arrived to me. Thanks again!
excellent video tutorial. quick question.... rather than take the whole aperture assemble apart could you just submerge the whole thing in alcohol (ipa) to clean the oil off? thanks
Depends on how you position the pin on the back of the lens. If you lock it, the aperture will be fully stopped down, if you free the pin the aperture will be wide open
Is the pin on the back at the mount locked?otherwise it only closes if you take a shot with the camera. Maybe you assembled it wrong and the pin in the lens is not connected to the adjustment ring
@@polpedra If you want it to be closed without having to take a shot you just have to lock the silver pin at the back of the lens, then it should close.
Hi! Thanks for the video. I have a problem with my FD 50mm 1.8 (silver ring, the old version), my aperturte doesnt work, its stuck. I tried pushing the small silver button (what is behinds the lens) and the aperture works but when I put in on the camera again its just stuck again :( Can you help me pls?
I tried to repair mine today, but my "lens Element" thats supposed to be twisted out, didnt move at all. Could it be possible that there is rust in it so its stuck? I saw a few other videos, on the nFD version where the element wasn't even screwed in place an could pop out by just turning the lens upside down. I will try that method tomorrow. Hope that explanation is kind of accurate (im from germany and nkt that fluent in english 😅) Smart to comment with nother of my accounts...
@@keisuke903 du kannst auch gerne auf Deutsch reden ;) ja ist durchaus möglich mit dem Rost, tröpfel einfach ein wenig Alkohol oder Nagellackentferner an die Stelle vom Gewinde, das zieht schnell ein und ggf. löst das die klemmung.
@@Sniggiscameras Ich habe mich jetzt einfach dazu entschieden mir ein nFD 50mm 1.8 zu kaufen. Das mit dem Alkohol habe ich versucht, aber leider hat es nicht geklappt. :( Ich danke dir trotzdem für deine Hilfe!
Ah the great WIHA/Xiaomi driver set. Buy one, buy once. Easily available, from AliExpress, EBay, Amazon, etc.Just watch the included cross drivers bits (Phillips) are NOT technically correct , while the lens' set screws will be more likely JIS. (Japanese Industrial Standard) en.wikipedia.org/wiki/List_of_screw_drives#JIS_B_1012
This is a well-done video. You can save some time and still get rid of the oil by removing the diaphragm assembly (2:00) and submerging it complete in 91% isopropyl alcohol. Work the blades open and closed a few dozen times. Lift out the assembly and blow it dry with canned air - do this with the blades open, closed, and partially closed. Repeat the entire process. Let the unit air-dry fully for several minutes. The diaphragm blades should now be 100% clean and dry. I've done it this way several times with success.
Yes this works well. You get paranoid at first that it won't be fully dry but given enough time and caution it will fully dry out.
If it's in a colder part of the year, you could also put the assembly on top of a radiator or heater if you have one running.
I have dried them off, then to make fully sure, placed the mechanism inside a clear plastic bag and put back onto the top of a radiator to check for any condensation inside the plastic bag but it has always been fine with no traces of moisture left.
Works for some other lenses too such as Carl Zeiss Jena 135mm MC
Yea thats right, maybe the more efficient way.
Thank you for making the video, I was able to fix a lens I got from goodwill. The blades were very oily and didn't come out at all. It was pretty easy to do, but the last blade was difficult and it took a few trials and I came up with quite a few new swear words during the process...It was much easier after I put a pad underneath the ring to keep it in place.
Nice! :)
Thank you so much for the video :) I've been able to access and clean the aperture blades thanks to you. It's a shame however that the "reassembly part" of the video be that accelerated, as it may be useful for the viewers. Great vid anyway !
Thank you very much :)
Дякую. Корисне відео!
Thank you for the help!
I was afraid to open completely the blades,so i dipped them in the liquid for a while. Fortunately it worked for the moment. If it stucks again in future,then i'll have to follow your instructions! :)
Only problem is, that even though the blades function flawlessly out of the lens, when mounted, the aperture don't go past f/8 ... Not sure if i do something wrong or if its the lens fault, cause the lens was already stuck at f/1.4 when it arrived to me.
Thanks again!
No Problem :)
Thank you for this. Was able to fix a new to me lens.
Thank you for this! I fixed mine, the oil had gotten on the blades and made them sluggish.
Thats great!
Thank you much, this video helps me to repair my lens😄
No problem :)
Great video!! But can i reach the aperture assembly on the 1.8 the same way?
Its pretty similar to the 1.4.
doesnt it need some grease? Also what was the liquid you submerged it in?
It works perfeclty fine without any grease. I was using pure alcohol.
Thank you
No problem :)
excellent video tutorial. quick question.... rather than take the whole aperture assemble apart could you just submerge the whole thing in alcohol (ipa) to clean the oil off? thanks
Yes thats possible but you probably don't reach the back of the aperture and its hard to get them cleaned properly if they arent dis
sassembled
@@Sniggiscameras okay thanks for your reply.
Thank you for the Video! - do you need to re-apply any oil or something to the mechanic?
No! The aperture blades work without any lubrication
Saved my life!
Good to hear!
Hi, when you clean the blades.
what about the base of the blades? do you have to clean it? and the oil inside the base of all aperture mecanism?
Thx
Yes, clean everything possible, the aperture mechanism doesnt need any oil .
question, what happens if i use the auto aperture (my camera doesn’t support it), will it be wide open or stopped down?
Depends on how you position the pin on the back of the lens. If you lock it, the aperture will be fully stopped down, if you free the pin the aperture will be wide open
I have a canon fd 200mm 1:4 lens is it any different disassembling compared to this? And can i dip the blades in hydrogen peroxide?
Its definitely different to this one but the repair is doable! Of course you can dip it in Hydrogen Peroxide, a good alternative to ethanol!
hey thanks for the video, helped me fix mine
Ayee, nice video. Think you'll ever upload any additional vintage lens repair videos?
Maybe, why do you ask?
@@Sniggiscameras I like the style of the tutorial. :)
@@OccultDemonCassette thx :)
Genial! Llevo rato buscando como reparar eso
Me alegra oírlo
Hello! Everything was good but when I put back the diaphragm won't open, it's always closed
Is the pin on the back at the mount locked?otherwise it only closes if you take a shot with the camera.
Maybe you assembled it wrong and the pin in the lens is not connected to the adjustment ring
@@Sniggiscameras Yes! Sorry, it is waht you said. It only closes if I take a shot with the camera. It's ok, thanks!
@@polpedra If you want it to be closed without having to take a shot you just have to lock the silver pin at the back of the lens, then it should close.
Hi! Thanks for the video. I have a problem with my FD 50mm 1.8 (silver ring, the old version), my aperturte doesnt work, its stuck. I tried pushing the small silver button (what is behinds the lens) and the aperture works but when I put in on the camera again its just stuck again :(
Can you help me pls?
have you locked the pin on the back of the lens?
@@Sniggiscameras I guess that yes, because now it is working well... I don´t understand why but now works haha thanks!!
@@plex8511 no problem :)
Thanks a lot
No Problem :)
What liquid did you use to clean it?
Ethanol
I use Zippo fuel lighter ,is super ok .
What is the silicone tool you used to disassemble the lens?
Its not a Special Tool, just use some kind of rubber
I have the same from ikea, it's yoused to keep cut ends of fruit an vegetables from drying out.
@@DasPlattenTier yes exactly😂
is the process on a FD 50mm F1.8 any different to this?
I dont think so
I tried to repair mine today, but my "lens Element" thats supposed to be twisted out, didnt move at all. Could it be possible that there is rust in it so its stuck? I saw a few other videos, on the nFD version where the element wasn't even screwed in place an could pop out by just turning the lens upside down. I will try that method tomorrow.
Hope that explanation is kind of accurate (im from germany and nkt that fluent in english 😅)
Smart to comment with nother of my accounts...
@@keisuke903 du kannst auch gerne auf Deutsch reden ;) ja ist durchaus möglich mit dem Rost, tröpfel einfach ein wenig Alkohol oder Nagellackentferner an die Stelle vom Gewinde, das zieht schnell ein und ggf. löst das die klemmung.
@@Sniggiscameras Ich habe mich jetzt einfach dazu entschieden mir ein nFD 50mm 1.8 zu kaufen. Das mit dem Alkohol habe ich versucht, aber leider hat es nicht geklappt.
:(
Ich danke dir trotzdem für deine Hilfe!
Ah the great WIHA/Xiaomi driver set. Buy one, buy once. Easily available, from AliExpress, EBay, Amazon, etc.Just watch the included cross drivers bits (Phillips) are NOT technically correct , while the lens' set screws will be more likely JIS. (Japanese Industrial Standard) en.wikipedia.org/wiki/List_of_screw_drives#JIS_B_1012