[Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6

[charlie]

On topic but off topic, how is everyone mounting their Rodenstocks? Care to share pictures of the modified lenses?

I'm grinding out a very thin Nikon F to M42 adapter that I was planning to epoxy to the lens, trying to keep as long a focus distance as possible. Before applying the epoxy I thought I see what others are doing. 

[stenrasmussen]

An empty 18-70 houses it well.

[Bjørn Rørslett]

The 100 mm f/1.6 is very simple to adapt to F-mount. Add 52 mm threads to it for example by using a Cokin filter adapter that has the suitable threads.  Then, add K-rings to act as spacers, and put a K-2 to the other K-rings to provide the camera mount. In the picture below, K-2, K-4, and K-5 have been used. Additional K-rings will allow the lens to focus closer.

[Mikes]

On topic but off topic, how is everyone mounting their Rodenstocks? Care to share pictures of the modified lenses?

I'm grinding out a very thin Nikon F to M42 adapter that I was planning to epoxy to the lens, trying to keep as long a focus distance as possible. Before applying the epoxy I thought I see what others are doing.

This is the result of the approach I took using a T-ring to Nikon adapter - as described in reply #33.

[John Geerts]

My Heligon has a connection like Bjørn describes.

A kind of white flower,  perhaps appropriate on All Souls' Day...

[John Geerts]

This is definitely the Heligon 100/1.6  with the Df    

[Jakov Minić]

John, it definitely is! 

[Björn Carlén]

The 100 mm f/1.6 is very simple to adapt to F-mount. Add 52 mm threads to it for example by using a Cokin filter adapter that has the suitable threads.  Then, add K-rings to act as spacers, and put a K-2 to the other K-rings to provide the camera mount. In the picture below, K-2, K-4, and K-5 have been used. Additional K-rings will allow the lens to focus closer.

How do you mount the filter adapter on the lens tube?
And, is the K-2 safe to use unaltered on a modern body?

[Bjørn Rørslett]

Usually the 52 mm thread supplier (Cokin or similar) can be seated against any convenient flange along the rear lens casing. Most of these lenses appears to have a step-ladder like profile, so the threads will find a final home somewhere. Exactly where is immaterial as you just add more spacers if necessary.  Fix permanently into position by small screws or judicious application of epoxy glue. Just ensure the threads stay clear of any glue residue and all is well.

Photo below should illustrate the basic concept (sorry - old photo and I just realised it isn't sharp at all, but should show what you need to know anyway).

I have used K-2 on all models of modern Nikons without encountering any problem, so that is what I would describe as 'safe mounting' in my book.

[Björn Carlén]

Thanks, Bjørn Rørslett!
Very informative.

[John Geerts]

The remains of the Dandelion (or it's family?) 

[Jakov Minić]

John is on a role

[John Geerts]

Thanks Jakov. It's good to illustrate the Heligon's qualities, I think  

[Bjørn Rørslett]

I stated this years ago, in my article on "Need for Speed", but bears repeating.

When there is no aperture, and [in principle] no means of focusing, all that remains is to make the image.

[John Geerts]

Yes, sort of