Author Topic: Medical Nikkor 120mm f4  (Read 2407 times)

Snoogly

  • NG Member
  • *
  • Posts: 93
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #15 on: April 16, 2021, 21:20:32 »
They won’t ship to Japan either! Seems bonkers, as it would just slip into an envelope.

I like a detective task, so I will poke around a bit more :-)

Patrick Blancheton

  • NG Member
  • *
  • Posts: 19
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #16 on: April 16, 2021, 22:11:26 »
So do I  ;)
Patrick

MEPER

  • NG Member
  • *
  • Posts: 664
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #17 on: April 16, 2021, 23:17:21 »
Have you tried to send a message to the seller if shipment would be possible?
You can always ask for a price?

There has been a real fire inside......wonder which component that is totally burned down. My guess is an e-cap.
Could it be the high voltage capacitor to fire the ring flash?    ....usually those caps are a bit bigger but it is a rather small flash......so maybe.....

Patrick Blancheton

  • NG Member
  • *
  • Posts: 19
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #18 on: April 17, 2021, 00:03:22 »
Have you tried to send a message to the seller if shipment would be possible?
You can always ask for a price?

I'll try and see  :)

Quote from: MEPER
There has been a real fire inside......wonder which component that is totally burned down. My guess is an e-cap.
Could it be the high voltage capacitor to fire the ring flash?
The most damaged component is the coil.

I'm pretty sure that the big capacitor to fire the flash is in the AC-UNIT LA-2.
I used it to power up my SB-21 to take the pictures as it is compatible with this ring flash.
Patrick

Patrick Blancheton

  • NG Member
  • *
  • Posts: 19
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #19 on: April 17, 2021, 00:19:27 »
I'll try and see  :)

I did try  :(
There is no way to ask even a simple question, the seller locked everything.

 
Patrick

MEPER

  • NG Member
  • *
  • Posts: 664
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #20 on: April 17, 2021, 00:27:29 »
I can see that......I also tried.....so no way to contact him.
Only possibility is if there is an US-member that could buy it and ship it to Europe.
It may be possible......

If it is a coil that is burned down.....something very violent took place inside that lens.......
Now I know why some components are advertised as "fire retardant".....

Ashlandish

  • NG Supporter
  • **
  • Posts: 118
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #21 on: April 17, 2021, 03:21:05 »
"Only possibility is if there is an US-member that could buy it and ship it to Europe.
It may be possible......


Patrick, I'd be willing to help, if you'd like. I'm just down the road from the seller, near Portland. I'm sure there are others here who would be willing as well. Let me, or perhaps other US based NG members or supporters, know. Would great for the lens to be back in tip-top shape and to see your work with it.
Tim Becraft

Patrick Blancheton

  • NG Member
  • *
  • Posts: 19
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #22 on: April 17, 2021, 10:38:37 »
Hi Tim,

Of course I'd like  :)
That's a great proposition that can be the definitive solution to get a hand on the manual.
Let me know by PM or email what are your conditions.

Patrick
Patrick

Ashlandish

  • NG Supporter
  • **
  • Posts: 118
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #23 on: April 17, 2021, 18:15:45 »
Patrick, I sent a PM...
Tim Becraft

Patrick Blancheton

  • NG Member
  • *
  • Posts: 19
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #24 on: April 18, 2021, 01:20:09 »
Patrick, I sent a PM...

Hi Tim,

My reply is sent  :)

Tim offered kindly to buy the manual for me and did it. Thanks again Tim.

Patrick
Patrick

Patrick Blancheton

  • NG Member
  • *
  • Posts: 19
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #25 on: April 28, 2021, 20:17:08 »
Hi all,

Finally I had a closer look to the PCB where the dead components are.
The most damaged one is a tantalum capacitor, so I'm more optimistic to repair the flash, as it's an easier spare part to find.
Patrick

Patrick Blancheton

  • NG Member
  • *
  • Posts: 19
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #26 on: May 05, 2021, 15:30:16 »
Hi all,

Thanks to Tim the manual was in my mailbox this morning.

But !
I've already done two deep dives into the manual, and alas I think I'm stuck.
Except for the resistors there is no values for the components in the tables, and what i'm looking for mainly is a capacitor.
Thanks to the Google Translate app on my iPhone I was abble to translate the japanese descriptions which are more complete than the english ones, but again no value.
I was right, the dead one is a tantalum capacitor, but that's all I know ;-(

But since the ring that do focusing/aperture (there're tied together) is a bit stiff I may fix this with the manual.

Thank again Tim

Patrick
Patrick

Erik Lund

  • Global Moderator
  • **
  • Posts: 5943
  • Copenhagen
    • ErikLund.com
Re: Medical Nikkor 120mm f4
« Reply #27 on: May 05, 2021, 19:57:47 »
Hi all,

Thanks to Tim the manual was in my mailbox this morning.

But !
I've already done two deep dives into the manual, and alas I think I'm stuck.
Except for the resistors there is no values for the components in the tables, and what i'm looking for mainly is a capacitor.
Thanks to the Google Translate app on my iPhone I was abble to translate the japanese descriptions which are more complete than the english ones, but again no value.
I was right, the dead one is a tantalum capacitor, but that's all I know ;-(

But since the ring that do focusing/aperture (there're tied together) is a bit stiff I may fix this with the manual.

Thank again Tim

Patrick
It's possible to decouple the aperture and the focus ring from each other by removing the link.

Erik Lund

Birna Rørslett

  • Global Moderator
  • **
  • Posts: 3238
  • A lesser fierce bear of the North
Re: Medical Nikkor 120mm f4
« Reply #28 on: May 05, 2021, 21:21:49 »
While the statement of Erik is absolutely true, there is a small caveat of how to control the now independent aperture ... I used a programmed CPU to help overcome this small problem. You need to have the CPU chip emulating "G" mode so actual aperture is dialled in on the camera.

Patrick Blancheton

  • NG Member
  • *
  • Posts: 19
  • You ARE NikonGear
Re: Medical Nikkor 120mm f4
« Reply #29 on: May 05, 2021, 22:42:51 »
Thanks Birna, my comprehension is now better to see how things are done when the link is removed.
We'll see ...
Patrick