Yongnuo 35mm f2 Teardown and Aperture Repair

As a hobby photographer I have enjoyed learning with Yongnuo lenses as they are very affordable. I currently own a variety of them and would still recommend them to anyone interested in learning photography. In this video I take apart my 35mm f2 lens. For almost a year I shot everything with a wide open aperture (as it worked fine that way) before discovering that it was stuck. So after buying a newer and better 35mm lens I decided that I would try repairing this one.
I am not a professional repair technician, so this video is for entertainment purposes only. Enjoy as you get to watch my journey of taking apart an aperture for the first time and the struggle to put it back together.

[@owent_yt1771]

DUDEE THANK YOU THANK YOU THANK YOU!!!! I followed your video step by step and it fixed my 35mm yongnuo!!!..You saved me from a lot of money getting a new lens and saved me from my job!

[@FeerSer]

Thank you! you helped me fix my lens :)

[@JonasDahlborg]

I just accidently found this video and I happen to own a broken yongnuo 50mm that always shows "error 01" on my canon 1300d... So its been in a drawer for maybe 2 years. I saw your video and thought "why not" and opened it according to your video. The 50mm is very similar to your 35mm. My apperture module was absolutely drowned in "oil" or whatever it was. I opened it and all the blades were stuck together and "wet"... The blades did look a bit different from yours but similar enough for me to figure them out. I put them on a paper and cleaned them using Qtips... I kind of just made them all "dry" again. It was not easy to put the thing together again... But after some trial and error methods I succeded. I did some misstakes when assembling the lens again so after first try I had aligned the AF-cogs wrongly so AF did not work. But after another dissassembly I understood how it should be put together and succeded. Now the lens works perfectly again. I love these videos where people share info. It was worth alot for me. Thanks!

[@thefunofphotography]

I made this video hoping someone else would find the details useful about the 35mm f2. There are not many teardown videos of these lenses, and it is nice to see what you are getting yourself into before attempting. I had to go in blind and hope I could get the thing back together. Whoever originally puts the oil in these lenses probably needs to watch. I imagine the blades work like a sponge once the oil from the other moving parts gets too hot (like in a delivery truck during the summer).

[@rouge29]

Nice , im gonna try this one , I got curious why even in Auto mode I get overexposure and it's because the aperture was stuck open and won't shut even in manual + dof button.

[@kyon_03]

Nice great video

[@thefunofphotography]

Thanks!

[@Mr.Thermistor7228]

I just bought one and JUST took it out of the box.... What do you know the aperture is stuck n not moving

[@thefunofphotography]

When mine was stuck, I could at least hear a small clicking noise of the lens attempting to open/close the aperture. This was the gear motor turning but unable to move the blades as the were all gummed up and stuck together. Mine was stuck all the way open. If by chance it is stuck all the way closed with no visible oil on the blades, it may be broken.

[@AlexSilva-xh2yi]

You not a professional lens repair guy , yet you display this kind of skill , if u were a professional repair man u would build a full camera from scratch. lol

[@thefunofphotography]

I am definitely not a professional, I just enjoy taking things apart. 😁

[@tutovibes2444]

Hi ! Is the same tutorial is available for the 85mm 1.8 yongnuo ? My aperture is broken too !

[@thefunofphotography]

I had trouble finding videos and was ready to toss my 35mm. So as a last ditch effort when I attempted the repair, I thought I would film it since not much is available. I am not familiar with the 85mm lens, so I am not sure if that repair is similar. Mine was a victim of excess oil causing the blades to stick together. After researching, this is a common problem if the lens has been in a hot environment.

[@madeirazz4361]

Hi I have the same problem. Wich screwdriver did you use to remove the screws?

[@thefunofphotography]

I believe it was a small phillips (+) screwdriver. Before removing the screws you will likely have to remove some glue that fills in the top of each screw if this is the first time the lens has been opened. Here is another video that shows someone doing that with a razor blade: kzbin.info/www/bejne/nJu5o2N_rK-smpo

[@madeirazz4361]

@@thefunofphotography Tks for the tips