Author Topic: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6  (Read 79584 times)

Birna Rørslett

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Re: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6
« Reply #435 on: January 09, 2022, 20:56:04 »
As a last resort, I might find one of my spare Z-mount is no longer needed in Norway, but would serve better say in Netherlands :)

John Geerts

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Re: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6
« Reply #436 on: January 09, 2022, 21:03:21 »
That is very kind of you, Birna, much appreciated.  ;)   

I will try tomorrow first the 200 degree in the oven.

Akira

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Re: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6
« Reply #437 on: January 10, 2022, 03:42:36 »
It looks simple.

But I made the most fatal error possible.  I glued the mount on the wrong side of the helicoid.    Nothing is possible any more.  The glue is too strong to correct the error.  And it is not possible now to connect the lens, to the moving part of the helicoid...

 I gave up...

Sorry about your mishap, John.  Incidentally, I didn't realize that such a strong glue exists (special epoxy?).  I may want to glue a cold shoe on top of my SIGMA fp with that glue...
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

John Geerts

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Re: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6
« Reply #438 on: January 10, 2022, 09:13:23 »
Thanks Akira.  It was extra strong 3 seconds epoxy. That glue also works great for other things and is stronger than the original 'bond'.       When will you have the SIGMA FP back?

Just tried the 200 C  method in the oven and it worked    ;D 

Can start from scratch now

Birna Rørslett

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Re: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6
« Reply #439 on: January 10, 2022, 10:17:38 »
Interestingly the epoxy glue should be hardened in the oven at 130-140C for about 30-60 minutes. Any higher temperature eventually will break the bond.

Looking forward to seeing your Rodenstockery contributions, John :)

Akira

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Re: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6
« Reply #440 on: January 10, 2022, 10:49:16 »
Thanks Akira.  It was extra strong 3 seconds epoxy. That glue also works great for other things and is stronger than the original 'bond'.       When will you have the SIGMA FP back?

Just tried the 200 C  method in the oven and it worked    ;D 

Can start from scratch now

Thank you, John, for the details.  I guess it would take at least two weeks until my fp comes back.  If the camera is in a "resalable" condition, I may take back the idea...
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

John Geerts

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Re: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6
« Reply #441 on: January 12, 2022, 20:05:36 »
Interestingly the epoxy glue should be hardened in the oven at 130-140C for about 30-60 minutes. Any higher temperature eventually will break the bond.

Looking forward to seeing your Rodenstockery contributions, John :)
Thank you.  Still working on it ;) 

I ordered extra glue to cement a ring inside the adapter to connect the Rodenstock lens. Also the adapter-ring from 65mm to 52mm, to connect the lens to the adapter

Birna Rørslett

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Re: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6
« Reply #442 on: January 15, 2022, 14:18:19 »
To illustrate the 100/1.6 Rodenstock also works on FX cameras, here is a night snapshot with the lens on the Z6. The timber pile was entirely lit by moonlight so having a fast lens and ISO 3200 allowed me to capture the scene. The corners weren't that bad as this is not infinity focus, however I might have trimmed the frame ever so slightly. As said above, using the Z fc alleviates any worries about frame coverage or poor corner quality.

John Geerts

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Re: [Theme] Df (D750)+ Rodenstock Heligon 100mm f/1.6
« Reply #443 on: Today at 08:31:09 »
Love that shot, Birna.

As my Rodenstock has a 52mm mount thread, I ordered a special 52-65mm ring adapter to make a solid construction with the Helicoid.  The 65mm rings are hard to find, by the way.