Chipping 55mm f/1.2 Dandelion

[Erik Lund]

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,,,

[Bjørn Rørslett]

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]

 nah.... not sacrifizing. I have more than enough faith in Erik's craftmanship.

Looking very good!

[richardHaw]

 

[Frank Fremerey]

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

[rosko]

Clean and net job, as usual...

Bravo, Erik !

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

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 ...

Indeed !

[Erik Lund]

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]

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 


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

[Bjørn Rørslett]

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]

Great!

[chris dees]

Indeed great.
I'm looking forward to put it on my Df. It will be a great combination.

[Erik Lund]

Had to replace the Dandelion again twice, one just died and one had sticky pins,,, long story short, it’s working now

[Erik Lund]

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.

Returning to inserting a new Dandelion into your 50mm 1.2 Ais turned out to be a wark in the park, cleaned up the mount cut the slit for the Dandelion to be seated in and a bit of two component glue to make it stay there. Worked in first try


Only the programming of the Dandelions is still an mental torture,,,


Anyway, it's ready and waiting for you to drop by and pick it up

[Birna Rørslett]

Super. Will do.

See you next Saturday

[Pistnbroke]

I would be interested to see a drawing of where you can and cannot cut into the dandelion block …….