Another CPH Session with Erik

[Bjørn Rørslett]

The CPU must be programmed according to its host lens specifications.

[Bjørn Rørslett]

Erik checks with the lens on his D3X that metering is perfect. He made a big smile so yes, it is ship-shape.

[Bjørn Rørslett]

We're almost working along concurrent lines here. Erik is modifying a 42 mm focusing helicoid to allow use of the CRT Nikkor 55 mm f/1.2 and the Ultra-Micro-Nikkor 55 mm f/2 on the 1V1 and AW1 cameras. Both will hopefully focus to infinity (remains to be seen after the modification process is completed. I submersed myself into UV wide-angles and the 21 mm f/4.5 Tamron in particular. The completed Tamron shown below with the specialised Nikon D3200 that has a UV bandpass filter inside.

I just verified the Tamron now works perfectly in UV, focuses to infinity, and exports all its CPU data properly to file EXIF. A big step forward for alternative explorations and discoveries of the UV world.

[Akira]

Getting a 42 or 52 mount would be ideal indeed. The only workable Nikon 1 adapter I've found (39mm, on eBay) is still unnecessarily too long but apparently there is no shorter one available.

Bruno, BORG makes a fairly thin Nikon 1 adapter:

http://www.tomytec.co.jp/borg/products/partsDetail/summary/468

It has a 49.8mm/7.5P thread on the other side in which a thin BORG 49.8 to 42mm adapter fits.  BORG makes a similar adapter for m4/3, too.

[Akira]

And this is 49.8 to 42mm/1.0P adapter ring.

Sorry to highjack the thread.  Please go back to the original topic.

[Bruno Schroder]

Great. Thanks a lot, Akira.

[Erik Lund]

Great write up Bjørn, can only chime in and say so far we have been blessed with all parts fitting together according to Bjørn's ideas of all of how to fit all the bits and pieces together 

Now the long dark winter evenings can be used trying to see why Nikons workshop could not get the Df 3D puzzle to work  And a PN11 in a bag btw...

[Bjørn Rørslett]

We combined a CX-C mount adapter which is very slim with a cut-down 42 mm focusing helicoid to come up with a suitable adapter for my CRT-Nikkor 55 mm f/1.2 lens, plus for the Ultra-Micro-Nikkors 55 mm f/2 and 28 mm f/1.8, respectively. However, only the CRT will focus to infinity. No big deal as infinity focus means these lenses are way outside their designated conjugate distances and the image quality takes a sharp nosedive simultaneously. Still, it is fun to use such a fast lens as the 55/1.2 CRT in this manner and get in-camera softening added to its supersharp image core.

[Bjørn Rørslett]

"Now the long dark winter evenings can be used trying to see why Nikons workshop could not get the Df 3D puzzle to work  And a PN11 in a bag btw..."

I'm liberal-minded when it comes to depositing bags of camera stuff at Erik's doorsteps ... Given he now lives in a Buddhist Study Centre, perhaps the added Zen atmosphere comes in handy to sort the bits and pieces ??

[Erik Lund]

He he, I'm sure the Df will enhance my meditation skills 

We are now off to a small tour of our houses - I'm sure Bjørn will be surprised how the rest of the place looks like... 

[Jørgen Ramskov]

Wow Bjørn! You've certainly kept Erik busy

[Mike G]

Mike, you can simply click REPLY button and click "Insert Quote" at the top right of each previous post displayed below the typing window while typing your reply.

Thanks Akira

[Bjørn Rørslett]

The two special-mount (52 mm thread) Erik created from a V1 and NEX-3, respectively, already have been taken into use for very exotic lenses. Also, I finally got a focusing mount for my 55 CRT f/1.2 Nikkor that allows infinity focus.

Here is the mighty Oude Delft Rayxar 65 mm f/0.75 on a NEX-3. This huge, and heavy, lens completely dwarfs the camera. After some trial and error I decided to fix focus to about 50 cm (up to 5 m is possible) in order to have a maximum covered frame in the camera.

The snapshot of the NEX-3 with the Rayxar is taken with the CRT 55 on its modified mount. The CRT is very sharp used in such a manner.

[Jørgen Ramskov]

You have created a monster

[Erik Lund]

It's a beauty