In August, 2021, I found this video and watched it many times. I wrote eight pages of notes too. My lovely 50mm f/1.4 AI'd lens very similar to this one had some fungus just beginning on edges of some inner lens elements. The focusing action was stiff during part of the focusing ring's turn, and totally loose in the rest of the focusing ring's turn, due to the age of the helicoid grease. This video helped me complete a total teardown. I cleaned each optical element with hydrogen peroxide and cleaned the pieces of the helicoids and regreased them. Got it all back together just fine. Now this lens works like new with clear glass and buttery smooth mechanical operation, but with the "patina" and wear marks of a well-used vintage lens. Thank you for this! -- I would like to see a video on how you make thse videos. Camera, settings, how the video camera is mounted overhead,, etc. I would like to video my own lens repairs from above.

I appreciate all your videos. I have the same lens with the same problem, but it overall much cleaner version. I wasn't able to remove the 3 screws holding the silver ring in front of the aperture ring. I do have JIS screw drivers and I tried isopropanol and acetone to unlock the threads but I still couldn't get those screws out. I didn't force it because I didn't want to destroy the screw heads. I ended up using a cotton swap to clean up all the grease I could get to and applied some #10 lube and worked it in. It's much better than it was, not perfect, but that's the best I could do without removing that ring.

There must be something about the earlier Nikkor 50mm 1.4 F-mount lenses. I bought my first one new around 1962, so it was a really early version. I had lubrication migrate onto the aperture leaves, so they would stick and not close fully or rapidly at exposure. I had the lens cleaned twice in ten years.. After 1976, I stopped using it in favor of new equipment acquired. It still works fine today, but is almost never used. Since it was one of the few lenses Nikon refused to convert to AI meter coupling in their great leap forward around 1978, I much later had it independently modified to AI operation. Still a very nice lens, yet imaging quite different from my late model Ai-S version.

i had that lens! it is very nice. thanks for your videos

Good Job! Thanks for the video!

A very very good film..thanks

Very interesting and useful tutorial thank you 🙏🏻

Wow this is a weird lens. It’s non-ai but has the same outer shell apart from the bunny ears and the ai cutout. Crazy. Thanks for the video. Will help me restore some manky old lenses

Many Thanks, great job

Thanks a lot!!!

Hi Kenneth, I have the same lens which I purchased online. Everything works well except that it cannot focus to infinity. Should I do some adjustment to the helicoid and how ? Thanks.

The instrument you’re using to take off the rubber focus grip is called a Stellite (a.k.a. “Plastic instrument”) it’s used in dentistry to apply certain composite resins as fillings for anterior teeth. The metal it’s made of is unique to other metals used to make dental instruments in that it’s non-reactive to the resins used to fill tooth-colored filling materials.

Hey thanks for the mention, I found it :)

Hi! I have the exact same lens with a problem: It does not reach the infinite point, it gets stuck between the 3 and 5 mts marks. If I follow the guide here, would I be able to repair it? Many thanks for the help

Hey Mike, i couldnt take off my element assembly, it looks exactly the same but simply wont come off. Could i get some help? Cheers

hello Kenneth, what about using a gun grease? they have broader temperature range and are less expensive. thank you.

Red threadlocker?

🖤

my focus lens would not twist.

nikkor type k 50 1.4

Can you help me with Nikkor 55 mm 1:28 #469291 len