Great video. I recently acquired a 50mm Series E pancake that the prior owner had disassembled and reassembled incorrectly which slightly damaged the end thread of the helicoid. No index marks made of course. Just about pulled the little hair I have left out with the trial and error extravaganza of getting that lens back in order! 😂
Helllo good sir and thank you for the informative video. I recently acquired a Kiron 28mm f2 Konica AR mount, absolute brand new condition. Sadly, after only a week of using it I unluckily dropped it straight onto the stone floor of a church, head on to the front rim. There's barely a dent, focus ring runs smoothly, but here's the issue: 1) the aperature is ring is almost stuck, and requires quite some force to be set to 2.8 or 2. 2) while focusing, although smooth, I can see my field of view sorta tilt very slightly as I change the direction of the focus ring from left to right. so clearly it took a hard hit, some things got loose (the tilt in view) and the aperture does not respond to changes, the diaphragm does not move. When a lens is dropped this way from waist height, do you think it is repairable? The impact clearly prevents certain parts to operate as they should. Your reply is highly appreciated before venturing down the rabbit hole of disassembling this beautiful piece of glass. Thanks, Thor
Impacts are difficult, and from your description the aperture ring or barrel under the aperture ring are bent. It also seems and element may be loose inside or is no longer sitting flat. It is not possible to get straight forward answers to a impact repair because there are so many variables. Sorry, not the greatest answer.
The larger cross point drivers I got about 35 years ago, I don't think they make them anymore. The flat tips are Starrett drivers with removable tips, other drivers I get whenever I see them.
Super interesting video. Do you care to share whether the pre-AI version of this lens is much different or has other important things to consider when doing the same? I just bought it with some haze just in front of the aperture.
I've had to give up as unrepairable several Nikkor lenses recently because the rear screws would not budge. I tried everything: tapping as you suggested; applying heat with soldering iron and/or heat gun; acetone etc and the screw head will sooner disintegrate than come out. Have you had this happen before and how do you deal with it?
Some of the screws in the older lenses can be a real bear to remove. My technic is fairly simple, I give the screw a shock using the screwdriver than using a lot of downwards pressure I wiggle the screwdriver first one way than the other very quickly. Doing it this way I don't have problems with mount screws anymore.
Thanks! I enjoyed your video. I have a non-AI lens that's stiff to focus I'd like to relube. I know the front will disassemble differently but any other big differences you can point out?
Hello Chris, on the older Ai lenses there will be big differences in the way it is built. Take lots of pictures and if I can get one point across is to make sure your alignment marks make sense to you.
Hi, thank you for your vdo. I bought an old but classic Nikkor 500mm reflex f8 and pulled them apart to clean the fungus which I did however I failed to mark the thread and as you can imagine, i'm at a lost now on how to put the focus ring back. Is it counter-clockwise when putting the focus ring back? Your expertise and advice would greatly be appreciated!
thx for the video I'm definitely going to take it to the shop instead
Thank you. I’ve started getting into camera and lens repair in my free time. Very therapeutic.
Well done! The reference marks (and how you make them are so important). I learned a lot during this short video!
Thanks for sharing the knowledge. Could you please also make a video on cleaning the lens
Great video. I recently acquired a 50mm Series E pancake that the prior owner had disassembled and reassembled incorrectly which slightly damaged the end thread of the helicoid. No index marks made of course. Just about pulled the little hair I have left out with the trial and error extravaganza of getting that lens back in order! 😂
sounds like fun!
Thanks for sharing the knowledge.
You are welcome.
Great video. Thanks very much.
Thanks a lot. I wish to just open the back side (camera end) of my Nikor AF to clean fungus. Can it be done.
Thank you , learn too much from you.
Helllo good sir and thank you for the informative video.
I recently acquired a Kiron 28mm f2 Konica AR mount, absolute brand new condition.
Sadly, after only a week of using it I unluckily dropped it straight onto the stone floor of a church, head on to the front rim.
There's barely a dent, focus ring runs smoothly, but here's the issue:
1) the aperature is ring is almost stuck, and requires quite some force to be set to 2.8 or 2.
2) while focusing, although smooth, I can see my field of view sorta tilt very slightly as I change the direction of the focus ring from left to right.
so clearly it took a hard hit, some things got loose (the tilt in view) and the aperture does not respond to changes, the diaphragm does not move.
When a lens is dropped this way from waist height, do you think it is repairable? The impact clearly prevents certain parts to operate as they should.
Your reply is highly appreciated before venturing down the rabbit hole of disassembling this beautiful piece of glass.
Thanks,
Thor
Impacts are difficult, and from your description the aperture ring or barrel under the aperture ring are bent. It also seems and element may be loose inside or is no longer sitting flat. It is not possible to get straight forward answers to a impact repair because there are so many variables. Sorry, not the greatest answer.
Where did you get your screw driver set and what is it called?
The larger cross point drivers I got about 35 years ago, I don't think they make them anymore. The flat tips are Starrett drivers with removable tips, other drivers I get whenever I see them.
Beautiful
Thank You Bart
Super interesting video. Do you care to share whether the pre-AI version of this lens is much different or has other important things to consider when doing the same? I just bought it with some haze just in front of the aperture.
Thanks for sharing your knowledge!Do you have any videos on nikkor 35mm T1:1.4
I have repaired many of these lenses but do not have a video yet. Maybe in the future. I'm just starting to make videos of my work.
Als je geen ervaring hebt van schroefdraden die meerganging zijn kan ik wel aannemen dat leken hier problemen met hebben.
I've had to give up as unrepairable several Nikkor lenses recently because the rear screws would not budge. I tried everything: tapping as you suggested; applying heat with soldering iron and/or heat gun; acetone etc and the screw head will sooner disintegrate than come out. Have you had this happen before and how do you deal with it?
Some of the screws in the older lenses can be a real bear to remove. My technic is fairly simple, I give the screw a shock using the screwdriver than using a lot of downwards pressure I wiggle the screwdriver first one way than the other very quickly. Doing it this way I don't have problems with mount screws anymore.
What screwdriver are you using?
Thanks! I enjoyed your video. I have a non-AI lens that's stiff to focus I'd like to relube. I know the front will disassemble differently but any other big differences you can point out?
Hello Chris, on the older Ai lenses there will be big differences in the way it is built. Take lots of pictures and if I can get one point across is to make sure your alignment marks make sense to you.
Micro threads? They're called helicoids.
I have always called the threaded part of the focus unit a helicoid. Some lenses have micro threads as part of the heliciod.
Great video but could maybe do without the distracting 'music'. Thanks.
Hi, thank you for your vdo. I bought an old but classic Nikkor 500mm reflex f8 and pulled them apart to clean the fungus which I did however I failed to mark the thread and as you can imagine, i'm at a lost now on how to put the focus ring back. Is it counter-clockwise when putting the focus ring back? Your expertise and advice would greatly be appreciated!