PC 19mm f/4 E ED

[Erik Lund]

The you obviously don't have the same old version I have shown in the image,,, is it the right diameter? The aluminum ring must be able to pass the front element,,,

It is the old version of the Burzynski lens collar for Micro-Nikkor AF-D 105mm 2.8 - It has the correct diameter, almost,,,

You need to trim off the flange on the inside of the nylon ring and I also trimmed down the length of the locking screw on the collar since the diameter of the 19mm is slightly smaller.

[PedroS]

Diameter is ok.
The aluminum ring fits perfect, but the plastic insert is a bit too large...
No worries, it will go some torture on lathe...

[Erik Lund]

Good, leave it as wide as possible, to keep it stiff.

[PedroS]

If all went well today is finished.
Tool is almost ready and lathe boring should be done.
Will post some photos (sorry have to be from my mobile)

[Erik Lund]

Good to hear!

[PedroS]

At the shop.

Did my best with my mobile (ok, with not a great camera), but... wonder how there are people satisfied with those cameras...
Never mind.

Work done!

Photo 1 - tool being made
Photo 2 - the tool attached collar, ready to be bored (centering the thing was interesting)
Photo 3 - the collar bored (already on lens)
Photo 4 - final result

[Erik Lund]

Very nice! Will be more stable than my slim version.

Nodal point seems to be at the front edge of the focus ring as far as my initial test have shown, please confirm if you have time at some point.

[Akira]

Really neat and awesome, Pedro!  Don't worry about the IQ of the smartphone so long as it does its job! 

[PedroS]

Thanks both.

But the original idea came from Erik, the master !

[longzoom]

Nicely done, Pedro! Will work as intended, but my suggestion to everyone else, with this 19 lens - use D800-810 naked  bodies only, without any kinds of grips. Do not use D3-D4-D5 heavy bodies on tripod this way, thru the lens,  cose the lens's camera mounting structure will be heavily overloading, as well as inner rotating mechanics. THX!  LZ

[Erik Lund]

A good advice for the cautious,,,

I have not seen the inside of this lens, but it feels very solid when working with the movements so I have confidence it will not be damaged with normal use.

For sure all of the Nikon cameras like D810 can be used with battery grip hanging from the F-mount as well as all D1-D5 can, how else would you shoot tele-lenses for instance,,,

[longzoom]

I mean 19 only.  The rest one may use as usual, for sure. THX!  LZ

[Akira]

Hmm...based on the teardown article at LensRentals.com, at least it may not be advisable to do the same thing with Samyang T/S lens...

[longzoom]

Yeah, be caution every time you want to use any optical/mechanical system over the limits it was designed to... THX!  LZ 

[PedroS]

Very nice! Will be more stable than my slim version.

Nodal point seems to be at the front edge of the focus ring as far as my initial test have shown, please confirm if you have time at some point.

Hi Erik, finally today did an extensive work with the 19mm TS.
Had time on hand to trial and error for the nodal point, discover mine a little bit on front of yours, namely 3mm on front of focus ring.