Search found 736 matches

by PeteM
Sun Jan 26, 2020 11:07 pm
Forum: Beginner's corner
Topic: Stereo Microscope Advice on Upgrade
Replies: 5
Views: 44

Re: Stereo Microscope Advice on Upgrade

That's a good offer and even if it isn't your ultimate stereo scope, should give more than $100 worth of education and fun. My opinion -- once you get over 50x or so magnification, the advantages of a stereo microscope recede (3D effect, depth of field, no need to prepare thin specimens, etc.) -- an...
by PeteM
Sun Jan 26, 2020 9:14 pm
Forum: Microscopes and optics
Topic: Leica Reichert Jung Polyvar (models)
Replies: 4
Views: 68

Re: Leica Reichert Jung Polyvar (models)

. . . What seems odd is that the microscope industry overall does not seem to realize people are going to want to raise the distance between the objective and the table. Olympus BX51/61 allow the arm to detach, but that took them forever to design that way -- and then the EPIs have two supports tha...
by PeteM
Sun Jan 26, 2020 9:02 pm
Forum: Beginner's corner
Topic: What affects the image produced from two different microscopes?
Replies: 5
Views: 53

Re: What affects the image produced from two different microscopes?

What wporter said. Once you managed to get the same petrographic sample, at the same magnification, with the same polarization angles then some differences might be: - quality and color temperature of the illumination system - even voltage differences in halogen - quality (extinction) and inherent c...
by PeteM
Sun Jan 26, 2020 8:43 pm
Forum: Beginner's corner
Topic: Stereo Microscope Advice on Upgrade
Replies: 5
Views: 44

Re: Stereo Microscope Advice on Upgrade

I'm not a fan of the cheap Chinese stereo zoom microscopes. Better ones are typically over $700 or so. The scope you already have is good for the price. Depending upon what you want to view, going down to 10x total magnification would be a priority for many. And adding a reducing or magnifying suppl...
by PeteM
Sun Jan 26, 2020 3:45 am
Forum: Microscopes and optics
Topic: Leica Reichert Jung Polyvar (models)
Replies: 4
Views: 68

Re: Leica Reichert Jung Polyvar (models)

Don't know for sure, but can pass on a bit of experience. Various Reichert (and later rebranded Leica) Polyar, Polylite, Metaplan etc. microscopes were sold for wafer inspection here in the Silicon Valley. Of the two I've owned and the few I've seen up close, the objective turrets, DIC prism slots, ...
by PeteM
Sat Jan 25, 2020 5:16 pm
Forum: My microscope
Topic: Reichert Polyvar Microscope
Replies: 41
Views: 693

Re: Reichert Polyvar Microscope

MWK - I checked and my parts Polyvar doesn't have good binocular head prisms. One suggestion, if cementing yours back together doesn't work. It looks like the entire head is held by 3 screws, much like many other heads. There's some chance you could adapt another infinity head, such as the ones used...
by PeteM
Fri Jan 24, 2020 11:12 pm
Forum: For forum members who want to buy and sell equipment
Topic: Wanted to buy or trade - DIC parts and more
Replies: 4
Views: 149

Re: Wanted to buy or trade - DIC parts and more

Andrey, The set of four Zeiss Jena PhV objectives I have are all Planachromat GF (wide field) infinity. There's a 12.5x, 25x, 40x, and 100x. These have a 25mm mount and the 100x is longer than DIN. By design, the 100x is apparently longer either to incorporate all the extra glass in a wide field pla...
by PeteM
Fri Jan 24, 2020 2:47 am
Forum: Microscopes and optics
Topic: Olympus AX/BX/IX DIC
Replies: 6
Views: 148

Re: Olympus AX/BX/IX DIC

My question is more along the lines of why the condenser gets different prisms for different magnifications but not the prism between the objective and camera. The prisms in the condenser are fixed - each one provides a proper shear angle for a single or a narrow range of objectives. The sliding pr...
by PeteM
Thu Jan 23, 2020 10:41 pm
Forum: For forum members who want to buy and sell equipment
Topic: Wanted to buy or trade - DIC parts and more
Replies: 4
Views: 149

Wanted to buy or trade - DIC parts and more

I'm hoping to complete one of several partial DIC scopes and also have a number of microscopes to trade or sell. Wanted: Leica DM series - DMLB stand or equivalent. Parts stand might be OK. Needs to have slot for DIC prism. - "D" or "D1" prism for DMR type (this will be mounted in a wedge-shaped sur...
by PeteM
Thu Jan 23, 2020 8:28 pm
Forum: For forum members who want to buy and sell equipment
Topic: Olympus BH DIC(NIC) Set for Sale...
Replies: 1
Views: 68

Re: Olympus BH DIC(NIC) Set for Sale...

Far as I know, the BH series DIC intermediate and slider should fit a BH-2. The dovetails are the same. It might have a slightly smaller field. And it's likely possible to add a bottom dovetail attachment for the DIC condenser to fit a BH2 mount. The polarizer function might have to move down to the...
by PeteM
Thu Jan 23, 2020 8:12 pm
Forum: Microscopes and optics
Topic: isn't this a good deal for a Leica microscope ?
Replies: 3
Views: 99

Re: isn't this a good deal for a Leica microscope ?

The DMLS is a very good microscope, both ergonomic to use and reliable, and they usually go for more than that listing. A few points: - It's hard to find one less than $1000 US complete and with a trinocular head - and you likely want one as noted above - The optics of a Reichert Microstar 410 are e...
by PeteM
Thu Jan 23, 2020 2:32 am
Forum: My microscope
Topic: Help on Leitz lens...can you help me with the shopping list ?
Replies: 7
Views: 131

Re: Help on Leitz lens...can you help me with the shopping list ?

I would go with the newer Leitz Laborlux S. It should be an off-white colored stand. While both scopes are very good mechanically, the newer focus blocks have a longer travel fine focus than the old classic gray Leitz Dialux era (SM-Lux). The extra range is useful for focus stacking. It will also ha...
by PeteM
Wed Jan 22, 2020 7:36 pm
Forum: My microscope
Topic: Reichert Polyvar Microscope
Replies: 41
Views: 693

Re: Reichert Polyvar Microscope

Nice looking scope. There's a slight chance I may have a set of prisms - be a week or so before I can check.
by PeteM
Mon Jan 20, 2020 9:09 pm
Forum: Introduce yourself
Topic: Hello from Minnesota!
Replies: 4
Views: 122

Re: Hello from Minnesota!

Sounds like you and your son are off to a great start.
by PeteM
Sun Jan 19, 2020 5:15 pm
Forum: Beginner's corner
Topic: Nikon Optiphot Fluorescence illumination - BF?
Replies: 15
Views: 219

Re: Nikon Optiphot Fluorescence illumination - BF?

Your scope needs finite (marked 160mm) objectives. Later in your microscopy life, it's possible to turn it into an infinity microscope. But that requires changing all the optics (head and its tube lens and eyepieces, objectives) and doing a bit of machining work. You'd keep just the mechanical bits ...
by PeteM
Sun Jan 19, 2020 6:30 am
Forum: Beginner's corner
Topic: Nikon Optiphot Fluorescence illumination - BF?
Replies: 15
Views: 219

Re: Nikon Optiphot Fluorescence illumination - BF?

The subjects you're interested in will all benefit from transmitted rather than reflected illumination. They'll sit on a slide, squeezed a bit under a coverslip. And, once properly set up, I think you'll be more impressed with what phase contrast can do. You have a truly excellent microscope to begi...
by PeteM
Sat Jan 18, 2020 11:22 pm
Forum: Microscopes and optics
Topic: 20x nikon plan apo infinite objectives on eBay for 100bux
Replies: 1
Views: 84

Re: 20x nikon plan apo infinite objectives on eBay for 100bux

I'll second that. These were a bargain at $160 a year or two ago. These objectives are good enough to go out of your way to get a stand for just the 20x. They'll also fit a Leica DMLS and the head corrections in these older Leica scopes are near enough neutral to satisfy most (or at least me). Also ...
by PeteM
Sat Jan 18, 2020 9:31 am
Forum: Beginner's corner
Topic: Nikon Optiphot Fluorescence illumination - BF?
Replies: 15
Views: 219

Re: Nikon Optiphot Fluorescence illumination - BF?

Greetings. A bit more information might be useful. 1) There are several types of Nikon metallurgical ("M") objectives, including 160mm tube length, 210mm tube length, and infinity (not likely your Optiphot has those). Which ones do you have or want? 160? 210? Just brightfield. Or with brightfield an...
by PeteM
Thu Jan 16, 2020 12:54 am
Forum: Pictures and Videos
Topic: Salt mix
Replies: 18
Views: 419

Re: Salt mix

Second image looks even sharper. Bravo.
by PeteM
Wed Jan 15, 2020 5:46 am
Forum: My microscope
Topic: Reichert Polyvar Microscope
Replies: 41
Views: 693

Re: Reichert Polyvar Microscope

MWK - the image isn't displaying; at least for me.
by PeteM
Wed Jan 15, 2020 3:11 am
Forum: My microscope
Topic: Reichert Polyvar Microscope
Replies: 41
Views: 693

Re: Reichert Polyvar Microscope

I've seen Polyvar's with both a separate head and one that's inclinable and built into the upper frame. A picture of your scope might help - there were several versions. If it is the former, I suspect you could get a Leica/Reichert head from a Microstar or Diastar and find it optically compatible, t...
by PeteM
Sun Jan 12, 2020 5:40 pm
Forum: Beginner's corner
Topic: thinking out loud here - moral thoughts
Replies: 21
Views: 1243

Re: thinking out loud here - moral thoughts

Be interesting, perhaps, to turn the question on its head. Should various viruses (ebola, hantavirus, rabies, smallpox, cholera, leprosy, tuberculosis, plague, flu, etc.) feel bad about the millions of humans they've killed in the normal course of their days?? Do bacteria (staph, pneumonia, salmonel...
by PeteM
Sat Jan 11, 2020 5:56 pm
Forum: Beginner's corner
Topic: Edmund Microscope Stage Will Not Move
Replies: 1
Views: 50

Re: Edmund Microscope Stage Will Not Move

The gear rack likely has dried grease. First thing you might want to do is to try free that up. A bit of heat carefully applied from a hair dryer (kept away from optics and not too hot for plastics) might soften it enough to gradually move the focus knob back and forth. Ronsonol lighter fluid in one...
by PeteM
Sat Jan 11, 2020 5:44 pm
Forum: Microscopes and optics
Topic: Leica PL Fluotar 100x/0.90 Dry
Replies: 3
Views: 98

Re: Leica PL Fluotar 100x/0.90 Dry

Two things to consider. First, these are meant for reflected, not transmitted, light. So they won't be in focus for slides with a cover slip. Might be OK for smears. Second, while it's handy not to have to oil an objective, I've never gotten as good resolution from a dry 60x and higher objective as ...
by PeteM
Sat Jan 11, 2020 12:07 am
Forum: Collecting microscopes and slides
Topic: B&L 1339cf compound head to fit sz mount?
Replies: 2
Views: 64

Re: B&L 1339cf compound head to fit sz mount?

Sure looks like it would fit the squarish B&L Stereo Zoom mount. It has the slots on the side, the same general shape, and the little bit of indexing square.

Looks like it also has a micrometer, likely a reticle. Cool.

Hope we'll see a full report??
by PeteM
Fri Jan 10, 2020 11:32 pm
Forum: Camera systems and imaging
Topic: Best option for attaching DSLR to Leica DMR trinocular port (HC)?
Replies: 6
Views: 154

Re: Best option for attaching DSLR to Leica DMR trinocular port (HC)?

I'll be interested in hearing how you make out on this. A Nikon Eclipse PLI 2.5x photo eyepiece would be a high quality relative neutral solution. This is your solution #5 - but higher quality optics. Nikon also has the same 200mm infinity tube length as Leica. That said . . . the "HC" system, accor...
by PeteM
Fri Jan 10, 2020 6:55 am
Forum: Beginner's corner
Topic: How to clean dirty pre-prepared permanent slides?
Replies: 5
Views: 142

Re: How to clean dirty pre-prepared permanent slides?

I use lens cleaner and lens tissues, taking care not to soak the edges of the cover slip.

"ROR" is one brand of decent lens cleaner. The "delicate task" Kimwipes would be fine for this. Both are available, affordably, on Amazon.
by PeteM
Fri Jan 10, 2020 2:20 am
Forum: Microscopes and optics
Topic: BHS Voltage
Replies: 14
Views: 221

Re: BHS Voltage

You can buy an external transformer (or an even cheaper solid state voltage converter) to convert from 220 to 110. I'd suggest one with around 200 watt capability to leave a bit of a margin.
by PeteM
Fri Jan 10, 2020 2:15 am
Forum: Pictures and Videos
Topic: Salt mix
Replies: 18
Views: 419

Re: Salt mix

Thanks, Saul. Very clever and effective setup.