Author Topic: Helicoid for EL-Nikkor 135mm 5.6A & 63mm 2.8N  (Read 275 times)

Bern

  • NG Member
  • *
  • Posts: 67
  • You ARE NikonGear
Helicoid for EL-Nikkor 135mm 5.6A & 63mm 2.8N
« on: July 21, 2022, 06:03:43 »
I recently had the opportunity to buy these two EL-Nikkors. The seller did not want to sell them separately but only wanted about USD 60 (including shipping) which I thought was not a bad deal.

I have been trying to look for what length of focusing helicoid to use for these but to no avail. I've read that a bellows would work but that would make the set up big. Is wishing for a helicoid that can go 1:1 or 2:1 be a long shot?

Any recommendations?

Here is a snap of the EL-Nikkor

Thanks everyone!
Keep shooting,
Bern

Dr Klaus Schmitt

  • NG Member
  • *
  • Posts: 995
Re: Helicoid for EL-Nikkor 135mm 5.6A & 63mm 2.8N
« Reply #1 on: July 21, 2022, 10:46:17 »
Read about that here on my site: https://photographyoftheinvisibleworld.blogspot.com/2011/01/how-to-determine-length-of-focusing.html

Not complicated, get a) a M39-M42 adaprer ring as such enlarger lenses have that Leica (M39 x 26tpi) thread mount and b) get a M42-Nikon adapter ring for the camera side, c) get a suitably long (i.e. according to your magnification needs) M42-M42 helicoid from ebay. DONE
formerly known as kds315

Bern

  • NG Member
  • *
  • Posts: 67
  • You ARE NikonGear
Re: Helicoid for EL-Nikkor 135mm 5.6A & 63mm 2.8N
« Reply #2 on: July 22, 2022, 09:55:29 »
Read about that here on my site: https://photographyoftheinvisibleworld.blogspot.com/2011/01/how-to-determine-length-of-focusing.html

This is the information I was looking for. After opening your blog, remembered reading it a few years back when I was interested with a 75mm Apo Rodagon D(R) enlarging lens. Just didnt know how to find it again.

I found a technical description for the EL-Nikkor 63mm that listed a flange focal distance information (55mm). Is this the same as the register length mentioned in your blog?

Really appreciate your taking time to reply to my initial post.
Keep shooting,
Bern

Dr Klaus Schmitt

  • NG Member
  • *
  • Posts: 995
Re: Helicoid for EL-Nikkor 135mm 5.6A & 63mm 2.8N
« Reply #3 on: July 25, 2022, 16:15:41 »
Yes "register length" is flance-focal distance indeed!
formerly known as kds315