Author Topic: Chipping 55mm f/1.2 Dandelion  (Read 642 times)

Erik Lund

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Chipping 55mm f/1.2 Dandelion
« on: September 26, 2017, 08:29:19 »
I have given in to chipping the 55mm f/1.2 with a Dandelion CPU,,, There are not much room for the block but fortunately the light baffle is integrated with the F-Mount so gives an opportunity to use it as an fixation base for a cut down Dandelion block.


There will need to be cut into the rear lens element similar to the cut for the aperture lever, so not into the image circle, out of focus Bokeh highlights will be unaffected ;)


Here shot of work in progress on the 55mm f/1,2


Will try and fix Bjørns broken 50mm f/1.2 in a similar fashion since it hopefully will be stronger than the first attempt at cutting up the Dandelion for these super fast lenses,,,
Erik Lund

Bjørn Rørslett

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #1 on: September 26, 2017, 09:02:27 »
You are indeed a brave man, Erik !! Kudos also to Chris for being willing to sacrifice his lens ...

There is even hope for a chipped future for my broken 50/1.2 - better and better.

Chris Dees

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #2 on: September 26, 2017, 09:39:30 »
 nah.... not sacrifizing. I have more than enough faith in Erik's craftmanship. ;D

Looking very good!
Chris Dees

richardHaw

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #3 on: September 26, 2017, 10:08:10 »
 :o :o :o
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Frank Fremerey

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #4 on: September 26, 2017, 11:11:45 »
We wait in awe, but I am sure there will be enough cooling liquid to make it work ... 8)

rosko

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #5 on: September 26, 2017, 12:56:50 »

Clean and net job, as usual... :D

Bravo, Erik !

Looking forward a next Get together : my 55mm f/1.2 is patiently waiting for such a surgery ! :P

My micro nikkor 105mm f/4, Voigländer 90mm, 300mm f/4,5 you chipped with Björn are still working like breeze... :)

We wait in awe, but I am sure there will be enough cooling liquid to make it work ... 8)

Indeed ! :)
Francis Devrainne

Erik Lund

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #6 on: September 27, 2017, 11:43:50 »
Thanks for the encouragements! Unfortunately the first Dandelion died at some point due to too heavy modification and or handeling etc. trying to fit it in the almost none existing space,,,


I have plenty more so I'll continue, I now know a little more about where I can shave off excess material on the Dandelion block, and where I need to back off,,,


The rear of the last lens group is now just clearing the rear of the Dandelion,,,


No images - Sorry - I was too pressed for time to finish other project before the trip to The Hague ;)
Erik Lund

Erik Lund

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #7 on: December 05, 2017, 09:33:58 »
Been on and off this little gem with the Dremel/Proxxon for some time now, so i'm excited to report that it now works as intended  ;D


The Dandelion is trimmed down, in the appropriate areas as well as the F-Mount, The Dandelion is seated within the 'light-baffle' part of the mount itself - Nicely held in place and well protected.


The rear elements and the mount differ from the 50mm 1.2 Ais in all ways and shapes, but I'll take the same approach when reinstalling a new Dandelion in Bjørns Lens ;)
Erik Lund

Bjørn Rørslett

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #8 on: December 05, 2017, 12:47:22 »
You did it again. Hadn't it been you I wouldn't have believed this was possible.

My hopes for my 50/1.2 are growing.

Fons Baerken

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #9 on: December 05, 2017, 12:53:52 »
Great!
Fons Baerken

Chris Dees

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Re: Chipping 55mm f/1.2 Dandelion
« Reply #10 on: December 05, 2017, 13:19:36 »
Indeed great.
I'm looking forward to put it on my Df. It will be a great combination. :D
Chris Dees