Search found 43 matches

by Brad_
Sat Nov 16, 2019 7:34 pm
Forum: Microscopes and optics
Topic: Leica DM IL (searching for correct set up info)
Replies: 9
Views: 1949

Re: Leica DM IL (searching for correct set up info)

I know nothing about your microscope but the head and eyepieces were standard equipment on the 160 TL Diaplan, If you think it would help I could mount the Diaplan's beastly phase condenser and a Leitz 160 TL objective on another 160 stand but I'm sure it will give a decent image. This won't preclud...
by Brad_
Sat Oct 26, 2019 5:40 pm
Forum: Microscopy accessories
Topic: Zero Working Distance Objective?
Replies: 5
Views: 3524

Re: Zero Working Distance Objective?

LOMO has made some "contact" objectives. There's five of them on eBay as I write.

I have no idea of how they are used or even what they are used for.

Have fun.

Brad
by Brad_
Thu Sep 12, 2019 4:10 pm
Forum: Illumination Techniques
Topic: Leitz Heine condenser and Orthoplan
Replies: 2
Views: 2533

Re: Leitz Heine condenser and Orthoplan

Hi,

Probably not. The PV series were made specifically for the Heine
back in the day when Leitz was using 35mm parafocal objectives.
Mount a 10x and see if you have at least another 5 mm of stage
travel. Better yet, wait for one of the Orthoplan users to chime
in.

Have fun.

Brad
by Brad_
Thu Aug 08, 2019 6:11 pm
Forum: Microscopes and optics
Topic: Leitz Diaplan condenser problem
Replies: 5
Views: 1664

Re: Leitz Diaplan condenser problem

I'm hopeless. Now I've double posted. Sorry.
by Brad_
Thu Aug 08, 2019 6:03 pm
Forum: Microscopes and optics
Topic: Leitz Diaplan condenser problem
Replies: 5
Views: 1664

Re: Leitz Diaplan Problem Solved

Thank you folks for your quick and encouraging response. After taking one of those pills I understood MichaelGs reminder to read the manual (RTFM). One figure clearly showed the condenser was removable. I had actually begun to doubt that. The problem was simply the condenser not being lowered enough...
by Brad_
Wed Aug 07, 2019 7:12 pm
Forum: Microscopes and optics
Topic: Leitz Diaplan condenser problem
Replies: 5
Views: 1664

Leitz Diaplan condenser problem

I just received the Diaplan listed on eBay as Not working Parts Only. All I really want from this 35 pound beast is it's rotating stage. To get at the stage I have to remove the condenser and I haven't been able to. Can the universal condenser be removed from its mount without major surgery or is it...
by Brad_
Sun Mar 31, 2019 2:47 pm
Forum: Microscopes and optics
Topic: Leitz Laborlux S and phaco objectives, no way of fine focusing. Help...
Replies: 37
Views: 6305

Re: Leitz Laborlux S and phaco objectives, no way of fine focusing. Help...

The Laborlux S comes with a POL analyzer.

This is a polarizing filter that slides into a slot beneath the head
and above the objective. It looks like a looks like black horizontal bar.
If this filter is damaged it certainly won't help your image.

Brad
by Brad_
Fri Feb 22, 2019 4:12 pm
Forum: Pictures and Videos
Topic: Blepharisma sp.
Replies: 10
Views: 2127

Re: Blepharisma sp.

Superb! I admire your stage control... or are you cheating and using a joy stick? Either way, you've made a beautiful production, both informative and entertaining. I've started maintaining cultures of these critters. With the help of "Blepharisma..." by Geise I hope to induce some giants. Who could...
by Brad_
Sun Jan 27, 2019 3:13 am
Forum: Illumination Techniques
Topic: Heine Condenser and Kohler illumination
Replies: 5
Views: 3515

Re: Heine Condenser and Kohler illumination

Hello Michael, Sorry for having been so terse in my reply. I was a bit busy. Here's a little more info. Leitz offered the Heine condenser early on in the development of the Ortholux, perhaps even in 1937. It's hard to believe but the early Ortholuxes were sold without even a provision for a field ir...
by Brad_
Tue Jan 22, 2019 8:22 pm
Forum: Illumination Techniques
Topic: Heine Condenser and Kohler illumination
Replies: 5
Views: 3515

Re: Heine Condenser and Kohler illumination

Hello Michael,
The Heine condenser isn't made to use a field iris or Kohler illumination.

Just keep your iris wide open and you'll be OK.

Have fun.

Brad
by Brad_
Sat Dec 29, 2018 5:16 pm
Forum: Pictures and Videos
Topic: Birefringence of Ice
Replies: 10
Views: 2058

Re: Birefringence of Ice

Wow!

Thanks.

Brad
by Brad_
Sat Dec 29, 2018 5:11 pm
Forum: Pictures and Videos
Topic: Some better targets for HMC
Replies: 14
Views: 3174

Re: Some better targets for HMC

Check out : http://micro.magnet.fsu.edu/primer/techniques/hoffman/hoffmanintro.html You can safely ignore the central modulator. You're not likely to find one. Scroll down and take the Interactive Tutorial. You'll need Java installed. The tutorial is not necessary but I've found it helpful. Edmund O...
by Brad_
Thu Nov 22, 2018 6:09 pm
Forum: Illumination Techniques
Topic: question about the difference background of phase contrast
Replies: 29
Views: 7555

Re: question about the difference background of phase contrast

You seem to have one too many condensers on your microscope. The 402a condenser is a "normal" working distance condenser, made to work on a 170 mm upright scope...not at all useful on an inverted scope. The tube that has "diaphram 1" is likely the proper condenser for the scope. There's problems wit...
by Brad_
Thu Oct 18, 2018 2:59 pm
Forum: Digital processing
Topic: Measureing Software
Replies: 8
Views: 11346

Re: Measureing Software

ImageJ by itself opens up a potential nightmare of dependency problems. The collection of modules that make up imageJ are being added to and modified on a daily basis and not always by Java experts. What works today may not work tomorrow. Problems may range from subtle to system crashing events. Fij...
by Brad_
Sat Oct 06, 2018 3:45 pm
Forum: Microscopes and optics
Topic: Inverted microscope vs upright microscope
Replies: 21
Views: 5667

Re: Inverted microscope vs upright microscope

Hi folks,

Here's a YouTube video I've enjoyed. It shows a Nikon rep
stripping down a Nikon Ti Eclipse, explaining as he goes.

https://www.youtube.com/watch?v=DAV0X1c3s-g

I must admit that this Nikon is even nicer than my AO 1820.

I hope you enjoy.

Brad
by Brad_
Fri Sep 29, 2017 1:38 pm
Forum: Beginner's corner
Topic: Unable to get focus on field diaphragm by moving condenser
Replies: 7
Views: 2677

Re: Unable to get focus on field diaphragm by moving condenser

Condensers are classed into two broad catagories: infinity corrected and those corrected to around ten or fifteen inches. See: http://www.microscopy-uk.org.uk/index.html?http://www.microscopy-uk.org.uk/primer/ Read section 7 "Illumination" The AO 20 requires an infinity corrected condenser. Read the...
by Brad_
Fri Jul 07, 2017 10:13 pm
Forum: Microscopes and optics
Topic: Short Nikon S inverted 20x objective - how to ID
Replies: 2
Views: 1077

Re: Short Nikon S inverted 20x objective - how to ID

The subject line is a bit confusing but I think you might want a Long Working Distance (LWD) lens. Used in conjunction with a LWD condenser and the correction collar on the objective you'll be able to focus through the added thickness of a tissue flask or petri dish. Be aware that at least some 1970...
by Brad_
Tue Apr 04, 2017 4:16 pm
Forum: Microscopes and optics
Topic: Leitz SM-LUX Focussing
Replies: 5
Views: 1878

Re: Leitz SM-LUX Focussing

The SM-LUX is made for 45mm parfocal objectives. It sounds like you have the shorter 37mm objectives which were "standard" on 1930-ish Leitz stands. There are PLEZY adapters, short tubes with a lens, that will bring the lengths up to 45mm. They're a bit expensive, $30 -$50, if you can find them. Mos...
by Brad_
Sun Mar 12, 2017 5:12 pm
Forum: Microscopes and optics
Topic: A Leitz Fluorite surprise or two
Replies: 1
Views: 849

A Leitz Fluorite surprise or two

After following Rudi's thread "Olympus UPlan..." I decided to tell how two Leitz Floutars suprised me. A while back I got a 10x .30 Floutar from eBay to finish filling a nose piece with Floutars. The bottom lens was spotless. I mounted the lens and nose piece and checked the innards with a phase tel...
by Brad_
Thu Mar 02, 2017 4:11 pm
Forum: Pictures and Videos
Topic: Mushroom gills 2x
Replies: 5
Views: 1140

Re: Mushroom gills 2x

It's a lovely image. I wouldn't be bashful about submitting this
to Nikon's Small World. Maybe a teeny tweak or two, maybe not.

Good work.

Brad
by Brad_
Thu Mar 02, 2017 3:51 pm
Forum: Microscopes and optics
Topic: Need help re placement & fit of Orthoplan optics - condenser K4 lens..
Replies: 18
Views: 3587

Re: Need help re placement & fit of Orthoplan optics - condenser K4 lens..

A thousand words are not necessary. It is obvious than the
condenser stop screw must be backed off until it no longer
interferes.

Check Google Pictures and you'll find a dozen or more images.
After savoring them you'll still have to back off that screw.

Have fun.

Brad
by Brad_
Wed Mar 01, 2017 4:18 pm
Forum: Microscopes and optics
Topic: Need help re placement & fit of Orthoplan optics - condenser K4 lens..
Replies: 18
Views: 3587

Re: Need help re placement & fit of Orthoplan optics - condenser K4 lens..

No need for photos. It's just a mundane Leitz condenser. The
only thing of interest is John's mystery piece.

Brad
by Brad_
Wed Mar 01, 2017 4:05 pm
Forum: Microscopes and optics
Topic: Another LOMO condenser issue
Replies: 15
Views: 3402

Re: Another LOMO condenser issue

How strange. It must be for filling the field of a low power objective but why go through the trouble of grinding such a substantial lump of glass, accurately mounting it and then frosting it? You might want to get on the Yahoo group "Microscope" A Russian fellow, Dushan I believe, used to lurk ther...
by Brad_
Tue Feb 28, 2017 10:58 pm
Forum: Microscopes and optics
Topic: Need help re placement & fit of Orthoplan optics - condenser K4 lens..
Replies: 18
Views: 3587

Re: Need help re placement & fit of Orthoplan optics - condenser K4 lens..

Wow! And I said "They are mechanically identical." I should know better than to speak in absolutes when it comes to this stuff. In both of my condensers the iris stop screw has no threads protruding, just the little nub beyond its threads sticks out. This is what you need. I'm looking at your four p...
by Brad_
Tue Feb 28, 2017 6:47 pm
Forum: Microscopes and optics
Topic: Need help re placement & fit of Orthoplan optics - condenser K4 lens..
Replies: 18
Views: 3587

Re: Need help re placement & fit of Orthoplan optics - condenser K4 lens..

As you know, I have the 603 and an earlier (1968?) model. They are mechanically identical. In both, the mounting sleeve beneath the iris shows the tool marks from the boring but are reasonably smooth to the touch. There is no "little screw tip" nor is there any visible need for one. Perhaps there is...
by Brad_
Tue Feb 28, 2017 5:52 pm
Forum: Microscopes and optics
Topic: Another LOMO condenser issue
Replies: 15
Views: 3402

Re: Another LOMO condenser issue

It sounds like your big LOMO's lamp is sending a parallel light beam, as if from infinity, to the condenser. The BFO-C condenser expects a diverging light beam, as if from 10 inches. The late Mr. Sterrenburg explains it nicely here: http://www.microscopy-uk.org.uk/primer/illumin.htm I doubt there is...
by Brad_
Sat Feb 11, 2017 11:31 pm
Forum: Microscopes and optics
Topic: My new Orthoplan's objectives - quite a mixture...
Replies: 33
Views: 5953

Re: My new Orthoplan's objectives - quite a mixture...

Wow. I thought the 30mm eyepieces were an option for the Orthoplan. Wrong again. Yann has the perfect solution for you...a couple 23-30mm adapters and a pair of 23mm Periplan 170mm eyepieces. You'll still have a great 'scope that will consume what little time you have left over from The Great Hunt F...
by Brad_
Sat Feb 11, 2017 7:07 pm
Forum: Microscopes and optics
Topic: My new Orthoplan's objectives - quite a mixture...
Replies: 33
Views: 5953

Re: My new Orthoplan's objectives - quite a mixture...

OMIGOD! Now we're into "Adapter lenses." When I saw these I believed they were the slip-on tube lenses that fit on my nose pieces and gave them no thought. I was about to say that my condenser didn't have an adapter until I gave a little tug and... Evidently, without knowing it, I got extremely luck...
by Brad_
Sat Feb 11, 2017 5:42 pm
Forum: Microscopes and optics
Topic: My new Orthoplan's objectives - quite a mixture...
Replies: 33
Views: 5953

Re: My new Orthoplan's objectives - quite a mixture...

The plot thickens. It took some diddling around to get my Ortholux set up properly so I waited 'till this morning to see if I could duplicate the problems you're having. I intended to put my 1.25 top lens on the older condenser and see what would happen. I found that the old 0.9 top lens has male th...