Search found 76 matches

by abednego1995
Wed Jul 22, 2020 5:25 pm
Forum: Equipment Discussions
Topic: Nikon 2.5x M Plan vs. 40/2.8 Apo-Componon
Replies: 11
Views: 530

Re: Nikon 2.5x M Plan

Low power objectives are difficult to design within their parfocal limits, and that doesn't help much with their image circle too. Used on a scope they'll perform as advertised.

Cheers,
John
by abednego1995
Sun Jul 05, 2020 3:37 am
Forum: Equipment Discussions
Topic: dummy sliders for Nikon DIC nosepiece
Replies: 1
Views: 291

Re: dummy sliders for Nikon DIC nosepiece

Yes, those nosepieces had dedicated inserts for those opening, though not like the sliders. It rather resembles a flimsy wedge that just fits in the opening. The later inverted scope DIC nosepieces have plug shaped inserts, but not sure if it will fit the C-ND type DIC nosepiece. Cheers, John IMG_18...
by abednego1995
Tue Jun 30, 2020 6:04 pm
Forum: Equipment Discussions
Topic: Good polarizer to put in front of a macroscope / microscope lens?
Replies: 17
Views: 1017

Re: Good polarizer to put in front of a macroscope / microscope lens?

Just a musing... but if the WD of the objective is sufficient, shooting off a reflection on a plane piece of glass or someother dielectric reflective surface at its Brewster angle would give pol. Would become an awkward setup but as a possibility.

Cheers,
John
by abednego1995
Sun Jun 07, 2020 1:06 pm
Forum: Equipment Discussions
Topic: Are Nikon OEM 20x 0.75 objectives really UV enhanced?
Replies: 12
Views: 941

Yup, Duke's comments pretty much nails it. UV transmission isn't the point with VC, axial chromatic abberation correction is. We use Fluors for better UV transmission, and if Nikon had "UV enhanced" Plan Apochromats in the first place that should have entered the market as the "dream objective" P.S....
by abednego1995
Sat Feb 15, 2020 1:37 am
Forum: Equipment Discussions
Topic: Apo Objectives: Edmund Optics 10x VS Mit MPlan 10x
Replies: 3
Views: 936

Nice test, but not sure what I'm seeing here.
Could you give uncropped images to give further context??

BR,
John
by abednego1995
Sun Jan 26, 2020 4:08 pm
Forum: Equipment Discussions
Topic: LU Plan or to TU Plan?
Replies: 3
Views: 531

>Macro Cosmos Another thing about these phase fresnel elements, they are a plastic (or resin, if you wish) pattern molded on glass. Though it's just over a decade since it's introduction, I'm still skeptic about dissimilar material bonding. But on the other hand, I'm not going to use them into the n...
by abednego1995
Sun Jan 26, 2020 3:08 am
Forum: Equipment Discussions
Topic: LU Plan or to TU Plan?
Replies: 3
Views: 531

LU Plan or to TU Plan?

Since observations using a Nikon CFI60-2 TU Plan ELWD 20x NA0.40 seems scarce, I’ll add some of my observations to answer the question, “how good are phase fresnel elements?” Objectives and Microscope Three objectives were tested. CFI60 LU Plan 20x NA0.45 WD4.5mm, CFI60 LU Plan Fluor 20x NA0.45 WD 4...
by abednego1995
Fri Jan 24, 2020 5:02 pm
Forum: Equipment Discussions
Topic: NA 0.9 vs NA 1.4 DIC is it worth to go for it?
Replies: 5
Views: 530

It would depend on how “fine” your subject is.
Resolution in DIC is also dependent on NA.

BR,
John
by abednego1995
Fri Jan 24, 2020 4:45 pm
Forum: Equipment Discussions
Topic: LWD Optosigma objectives.
Replies: 26
Views: 1496

TU Plan, and T Plans, have been for almost 10 years now (released in 2012 maybe) and I picked up two in 2017, thinking wow the specs on these new lenses looks amazing, turns out only a few of the TUs actually have fresnel technology, mostly 50x-150x, these are the APO TU Plans, 50-100x, the TU Plan...
by abednego1995
Fri Jan 24, 2020 1:19 am
Forum: Equipment Discussions
Topic: LWD Optosigma objectives.
Replies: 26
Views: 1496

The LU plans from Nikon suffer from CA even with the Fluor series.
However, the TU Plans are completely a different game with their
use of phase fresnel elements. The TU Plan ELWD 20x is my
favorite.

BR,
John
by abednego1995
Tue Nov 05, 2019 8:10 pm
Forum: Equipment Discussions
Topic: Service Manual for Meiji ML2000?
Replies: 4
Views: 395

Not sure what Meiji Techno uses, but Nikon uses an alcohol based adhesive to secure those kind of screws.

Cheers,
John
by abednego1995
Mon Sep 02, 2019 8:45 pm
Forum: Equipment Discussions
Topic: Nikon U10 and U20...
Replies: 30
Views: 15918

Reviving an old thread, but thought to add some information for someone who might be seeking it. The U series objectives are meant to be used with a universal stage on a polarizing microscope as already mentioned in the previous posts. So the magnification and NA engraved on the barrel only apply wh...
by abednego1995
Fri Aug 30, 2019 10:50 pm
Forum: Equipment Discussions
Topic: Restoring plastic handrests, Nikon Optiphot-2 ?
Replies: 6
Views: 1397

I've cleaned up mine with isopropanol. Kind of messy and tedious, but works.

Cheers,
John
by abednego1995
Wed Jun 26, 2019 5:25 pm
Forum: Equipment Discussions
Topic: Labophot vs labophot 2 field lens diameter
Replies: 4
Views: 562

Both versions of the Labophot will accept 45mm diameter filters on their filed lenses. If you're using the lower simple pol accessory, I would think that the polarizer will fit the Labophot-2. Cheers, John http://www.photomacrography.net/forum/userpix/5919_Untitled_2.png http://www.photomacrography....
by abednego1995
Wed May 29, 2019 2:46 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Raynox and (real ?) infinity
Replies: 17
Views: 5803

The Raynox DCR-150 is 4.8diopters which equals to f=210mm. Your setup looks a bit longer than 210mm from the Raynox to the camera image plane. Taking a few extention tubes off the front would probably get you to inf. * And, yes you still can get images from infinity objectives and tube lenses that a...