Telecentric Scanner-Nikkor ED LENS: Nikon 8000 ED lens

etalon · Post by **etalon** » Wed Jan 23, 2019 1:45 pm

Thank you, gentlemen!

Ramon, I have lightning done only quick and dirty. I put the specimen under my microscope with build on illumination and a sheet of paper for a diffusor. I know, this setup have much potential for improvement, but that would be the next step...

Concerning the radioactivity: Yes, Uranophane is radioactive, because of its content of uranium. But in that size and if you take care about some rules, handling is no problem...

Olaf, here is one more, but I hope, it would be more and more in future:

https://www.mineralienatlas.de/viewF.ph ... 1548275314#

It ist rutile on quartz. FoV is again 18.5mm long side, and it is a 60 layer stack with 100um step size. Postprocessing with PS CC2018.

Hope, to see also pics from other user soon, too...

Cheers,
Markus

Attached pics from the actual quick an dirty setup...

RDolz · Post by **RDolz** » Wed Jan 23, 2019 4:29 pm

Markus:

Maybe it's "quick and dirty setup", ... but the result is spectacular, ... your images reflect that microworld in a very natural way, .. congratulations.

Regarding the setup, could you describe the elements that you use? ... I find it a robust and elegant solution.

Best

Olaf G · Post by **Olaf G** » Thu Jan 24, 2019 12:02 am

Markus, I like this picture even more!
Thank you for posting your setup. I think I need a linear stage with micrometer adjustments...

etalon · Post by **etalon** » Thu Jan 24, 2019 3:11 pm

Hello folks,

thank you!

Ramon, attached you´ll find the numbered assembly:

1 = Newport magnetic base
2 = Sirui L-10 Monopod Tilt Head
3 = Newport linear stage with 1" travel and micrometer
4 = Rack and pinion linear stage
5 = lens hood and UV/IR cut filter
6 = Scanner Nikkor 8000 lens
7 = Spacer rings with black velours inside
8 = Olympus OMD EM5 mk2 in high res mode

Most of the parts are from my optical bench. The setup normally used on an optical breadboard, where the magnetic base can be fixed, but the setup is heavy enough, to work also without a breadboard. Regarding the spacer rings it is very important to use internal velours or black flocking to avoid stray light. This causes a really intense glare, which you also reported. With black velours inside, it is completely gone!
The rack and pinion linear stage is used for the rough focus, the micrometer stage is used for the steps.

Hope, this helps, further questions are welcome...

Cheers Markus

P.S.: Further pics will come soon...

Chris S. · Post by **Chris S.** » Thu Jan 24, 2019 11:52 pm

Markus,

Thanks for your useful description of your macro rig!

I've wondered about using a monopod head to permit tilt adjustment in a macro rig. To my mind, the advantage of a monopod head for this use is that it provides only one degree of freedom--angular adjustment of up/down rotation--so could be both easier to use and more optimized for tilt-only movement, compared with, say, a ball-head.

It's helpful to hear (via a followup PM) that this Sirui head is stiff and easy to use. In your setup, you have a rather long lever arm acting on the Sirui; if the Sirui remains steady with this long arm acting on it, this speaks very well of this Sirui monopod head.

Cheers,

--Chris S.

RDolz · Post by **RDolz** » Fri Jan 25, 2019 2:43 am

Hi, Markus:

I love the setup, ... very solid. Cool.

etalon wrote:7 = Spacer rings with black velours inside
8 = Olympus OMD EM5 mk2 in high res mode

I also use the extension rings with black velvet and black paint, ..... What surprised me was that, as the magnification decreased, in direct mode the glare increased while in the reverse mode it was negligible. What is the diameter of the extension rings you use?

I see that you use the high resolution mode, ... a patient job. Can you give us a link where we can see some image with the maximum resolution? .. something like easyzoom.

best

etalon · Post by **etalon** » Fri Jan 25, 2019 3:34 pm

Chris,

yes, I can absolutely recommend the Sirui monopod head. It has no problem with the lever arm caused by the camera and optics.

Ramon,

my extension rings have an inner diameter of about 48mm. I think, how shorter the distance between lens and sensor is, there would be more stray light affecting the sensor. Because of different focal length at each side of the lens, the amount of stray light, reflected by the extension tubes, is different to each other due to the different light cone angel. I think, thats the reason of the difference when using the lens reversed...

Here can you have a look to the uranophane pic in full resolution:

https://easyzoom.com/image/133827/new

And here a couple of new pics...

https://www.mineralienatlas.de/viewF.ph ... 1548451855#

https://www.mineralienatlas.de/viewF.ph ... 1548451942#

https://www.mineralienatlas.de/viewF.ph ... 1548452055#

Fov is ca. 18,5mm in each pic.

Cheers,
Markus

RDolz · Post by **RDolz** » Fri Jan 25, 2019 3:59 pm

Markus: They are fantastic images!

The image of easy zoom is magnificent, that variety of crystallizations, a hypnotic landscape ... you should upload all photographs at maximum resolution.

Congratulations. Thanks for sharing.

Best

dolmadis · Post by **dolmadis** » Sun Jan 27, 2019 4:53 am

Might interest someone

https://www.ebay.co.uk/itm/132929701487?ul_noapp=true

Olaf G · Post by **Olaf G** » Sun Jan 27, 2019 5:26 am

Great pictures, Markus!

Lou Jost · Post by **Lou Jost** » Sun Jan 27, 2019 6:45 am

dolmadis, that could be a great deal for someone in the UK!!!