Author Topic: PB-4 electrified  (Read 4828 times)

PedroS

  • NG Member
  • *
  • Posts: 412
  • You ARE NikonGear
PB-4 electrified
« on: January 08, 2017, 22:30:33 »
Done with Kenko rings. They are not perfect but enough for this try... and must say successful final result.
When I coupled all, realized that the 60mm micro AFS didn't work at all... bear in mind that electrical signal must flow through lens mount, some sort as "earth" line. Strange enough as the 105mm micro didn't need it.
I had to disassemble everything and made another contact through the mounting bases.

Don't dislike the final result, even if the rings would be better if smaller.


Nasos Kosmas

  • NG Supporter
  • **
  • Posts: 914
  • Athens, Greece
Re: PB-5 electrified
« Reply #1 on: January 08, 2017, 22:56:31 »
Very nice idea  and the remaining extra conducts for other project
Recently i dis-malt for repair an 35 1.8 DX  and i notice another contact that goes to the metal  F mount of the lens, its good to know that without this conduct nothing is working :)

Bjørn Rørslett

  • Fierce Bear of the North
  • Administrator
  • ***
  • Posts: 8252
  • Oslo, Norway
Re: PB-5 electrified
« Reply #2 on: January 08, 2017, 23:18:44 »
Isn't this a PB-4 bellows?

Akira

  • Homo jezoensis
  • NG Supporter
  • **
  • Posts: 12468
  • Tokyo, Japan
Re: PB-5 electrified
« Reply #3 on: January 08, 2017, 23:27:12 »
Neat job, Pedro!  I wonder if there is another remaining wire in the multi-cable for grounding the mount?
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

PedroS

  • NG Member
  • *
  • Posts: 412
  • You ARE NikonGear
Re: PB-5 electrified
« Reply #4 on: January 08, 2017, 23:41:17 »
Isn't this a PB-4 bellows?

Of course... thanks

PedroS

  • NG Member
  • *
  • Posts: 412
  • You ARE NikonGear
Re: PB-5 electrified
« Reply #5 on: January 08, 2017, 23:42:28 »
Neat job, Pedro!  I wonder if there is another remaining wire in the multi-cable for grounding the mount?

Thanks Akira.

Not on those Kenkos.
Need to wired them...

Hugh_3170

  • NG Supporter
  • **
  • Posts: 1996
  • Back in Melbourne!
Re: PB-4 electrified
« Reply #6 on: January 09, 2017, 13:45:06 »
Nice work Doctor S!

How flimsy/flexible are the plastic Kenko body tubes and are their metal bayonets and lens mounts a good fit?

Thanks in anticipation.
Hugh Gunn

PedroS

  • NG Member
  • *
  • Posts: 412
  • You ARE NikonGear
Re: PB-4 electrified
« Reply #7 on: January 09, 2017, 14:02:20 »
Thanks Hugh

The Kenko metal parts are ok, and provide a good fit.
Flexibility is due to weaker spring holder system and plastic body.
The Kenko normally comes with three rings (12, 20 and 36mm).
Smallest is ok, the medium ok-, and the longer is bad.
Stacked? Forget it.

Only really usable if used with light lenses.

Hugh_3170

  • NG Supporter
  • **
  • Posts: 1996
  • Back in Melbourne!
Re: PB-4 electrified
« Reply #8 on: January 09, 2017, 14:39:28 »
Thanks Pedro.

Your feedback has confirmed my suspicions.  I am thinking out loud here, but maybe the Kenkos could at least serve as a source of electrical parts for electrifying Nikons metal extension rings.
Hugh Gunn

Erik Lund

  • Global Moderator
  • **
  • Posts: 6480
  • Copenhagen
    • ErikLund.com
Re: PB-4 electrified
« Reply #9 on: January 09, 2017, 15:25:00 »
Well done Pedro ! :)
Erik Lund

PedroS

  • NG Member
  • *
  • Posts: 412
  • You ARE NikonGear
Re: PB-4 electrified
« Reply #10 on: January 09, 2017, 15:44:25 »
Thanks Pedro.

Your feedback has confirmed my suspicions.  I am thinking out loud here, but maybe the Kenkos could at least serve as a source of electrical parts for electrifying Nikons metal extension rings.

I have looked at that possibility too. But the way Kenko electrical parts are done and attached are not easy adapted to Nikon extension rings. Extensive lathe work has to be done, but I have not yet rest this case, thought.

Erik Lund

  • Global Moderator
  • **
  • Posts: 6480
  • Copenhagen
    • ErikLund.com
Re: PB-4 electrified
« Reply #11 on: January 09, 2017, 16:08:24 »
Thanks Pedro.

Your feedback has confirmed my suspicions.  I am thinking out loud here, but maybe the Kenkos could at least serve as a source of electrical parts for electrifying Nikons metal extension rings.

Even though it might be more expensive in cash, it is by far much 'cheaper' in man-hours to just remove the glass form for instance a TC-E14, 17 or 20
Erik Lund

PedroS

  • NG Member
  • *
  • Posts: 412
  • You ARE NikonGear
Re: PB-4 electrified
« Reply #12 on: January 09, 2017, 16:12:32 »
Even though it might be more expensive in cash, it is by far much 'cheaper' in man-hours to just remove the glass form for instance a TC-E14, 17 or 20

You're right Erik.
But still need to connect both TCs with electrical wire...

Erik Lund

  • Global Moderator
  • **
  • Posts: 6480
  • Copenhagen
    • ErikLund.com
Re: PB-4 electrified
« Reply #13 on: January 09, 2017, 16:35:49 »
You're right Erik.
But still need to connect both TCs with electrical wire...

I was referring only to this:

Thanks Pedro.

,,,, for electrifying Nikons metal extension rings.

Which would be an almost impossible task due to the aperture guides in the rings,,,
Erik Lund

richardHaw

  • Cute Panda from the East...
  • NG Supporter
  • **
  • Posts: 3134
  • Your lens loverboy
    • Classic Nikkor Maintenance and DIY
Re: PB-4 electrified
« Reply #14 on: January 09, 2017, 17:02:11 »
this is very smart :o :o :o