Search found 102 matches

by carlh6902
Tue Sep 17, 2019 2:50 am
Forum: For forum members who want to buy and sell equipment
Topic: Much Stuff For Sale - Everything Must Go!
Replies: 7
Views: 940

Re: Much Stuff For Sale - Everything Must Go!

PeteM,

Great idea. I could fit a dozen in the space of the stove, easily. It's outta' here...

Carl
by carlh6902
Tue Sep 17, 2019 2:38 am
Forum: For forum members who want to buy and sell equipment
Topic: Much Stuff For Sale - Everything Must Go!
Replies: 7
Views: 940

Re: Much Stuff For Sale - Everything Must Go!

So now I'm seeing an egg, sunny side up, on the heated stage. It could work!

Carl
by carlh6902
Mon Sep 16, 2019 3:52 pm
Forum: For forum members who want to buy and sell equipment
Topic: Much Stuff For Sale - Everything Must Go!
Replies: 7
Views: 940

Much Stuff For Sale - Everything Must Go!

Over the past seven or eight years, I have been an avid microscopy hobbyist. My interests have been primarily focused on Olympus scopes, especially the BH-2 line. I have devoted a great deal of time to collecting (some would say hoarding) and learning to repair and restore these microscopes. This ho...
by carlh6902
Fri Aug 16, 2019 2:11 am
Forum: For forum members who want to buy and sell equipment
Topic: Found: Olympus SWK10 Eyepiece
Replies: 0
Views: 459

Found: Olympus SWK10 Eyepiece

:mrgreen: Looking for a single Olympus SWK 10 ocular.

Carl

Thanks all. I have found this item. Thanks Chris!
by carlh6902
Tue Jul 02, 2019 11:31 pm
Forum: Beginner's corner
Topic: Darkfield - is resolution lost?
Replies: 62
Views: 3796

Re: Darkfield - is resolution lost?

Darkfield is inherently lower resolution than brightfield, and also is not a faithful representation of the specimen image, due to the loss of the zero-order light in the fourier-reconstructed (via interference) final image. Carl I should have been more clear in what I was trying to say. True, the ...
by carlh6902
Mon Jul 01, 2019 1:38 am
Forum: Beginner's corner
Topic: Darkfield - is resolution lost?
Replies: 62
Views: 3796

Re: Darkfield - is resolution lost?

Darkfield is inherently lower resolution than brightfield, and also is not a faithful representation of the specimen image, due to the loss of the zero-order light in the fourier-reconstructed (via interference) final image. At highest power, the objective NA must in practice be limited either by an...
by carlh6902
Mon May 27, 2019 6:58 pm
Forum: About the website, the magazine and this forum
Topic: Darkfield using Olympus BH2/BHS
Replies: 4
Views: 4455

Re: Darkfield using Olympus BH2/BHS

sombre wrote:Many thanks to all for the help and suggestions.
I think I will go down the diy route until such times as I can find the correct condenser etc:
Again many thanks.

Sombre

There is a seller on eBay selling a nice system that works with the standard BH2-CD abbe condenser. Check it out.

Carl
by carlh6902
Mon Jan 07, 2019 5:32 am
Forum: Microscopes and optics
Topic: Olympus BH-2 Question. Lamp intensity adjuster. Faulty?
Replies: 17
Views: 4442

Re: Olympus BH-2 Question. Lamp intensity adjuster. Faulty?

I have released another significant update to this document. It now includes a comprehensive troubleshooting section, complete with flowcharts. It went from 22 to 34 pages. Carl Edit 4/14/2019: Replaced outdated link with a link to the master index, which always contains the most recent versions: ht...
by carlh6902
Sun Dec 30, 2018 9:07 pm
Forum: For forum members who want to buy and sell equipment
Topic: Looking for parts for Microstar IV
Replies: 17
Views: 2499

Re: Looking for parts for Microstar IV

Wow Bill,

Thanks for the excellent post!

Carl
by carlh6902
Thu Dec 27, 2018 2:26 am
Forum: For forum members who want to buy and sell equipment
Topic: Looking for parts for Microstar IV
Replies: 17
Views: 2499

Re: Looking for parts for Microstar IV

The thing barely gets out of the light path as it is. If the OD were much bigger, it probably wouldn't.

Carl
by carlh6902
Thu Dec 27, 2018 1:50 am
Forum: For forum members who want to buy and sell equipment
Topic: Looking for parts for Microstar IV
Replies: 17
Views: 2499

Re: Looking for parts for Microstar IV

Yes, heat resistance would be the problem with 3D printing. Maybe some of the uv curable resins would be up to the task, but I don't know. Now that I know that I'm not likely to find exact replacement, I may pull the bottom back off and have anoth look. I may just be able to cement a larger disk on ...
by carlh6902
Wed Dec 26, 2018 11:41 pm
Forum: For forum members who want to buy and sell equipment
Topic: Looking for parts for Microstar IV
Replies: 17
Views: 2499

Re: Looking for parts for Microstar IV

wporter, Yes, that is exactly the part! The plastic gets well blasted with heat from the 20W lamp. The carrier was broken in half, so I concur it's a fragile part. I have it epoxied back together with JB Weld, so it might work. But I don't have the filter either. Please let me know if you are able t...
by carlh6902
Wed Dec 26, 2018 11:29 pm
Forum: For forum members who want to buy and sell equipment
Topic: Looking for parts for Microstar IV
Replies: 17
Views: 2499

Re: Looking for parts for Microstar IV

Apochronaut, Right between the 7388 Esb lamp and the diffuser in the lamp inlet optics, there is a filter holder that swings in and out, as controlled by the "blue" knob on the front. The blue filter is missing , and the plastic holder is broken. There is also a neutral density filter, after the inl...
by carlh6902
Wed Dec 26, 2018 9:32 pm
Forum: For forum members who want to buy and sell equipment
Topic: Looking for parts for Microstar IV
Replies: 17
Views: 2499

Looking for parts for Microstar IV

I'm looking for a few parts to complete my Reichert era Microstar IV. I need the blue filter, and if possible, the swing out carrier for this filter, that's in the base of the unit. Please PM me if you have these parts.

Carl
by carlh6902
Sun Dec 09, 2018 10:04 pm
Forum: Off Topic
Topic: Anyone see their microscope 'in the movies'?
Replies: 6
Views: 2987

Re: Anyone see their microscope 'in the movies'?

In "The Last Man On Earth", Vincent price is a researcher, using a 6-inch toy microscope at home. It's funny to watch him hunch down and peer into the little toy. As the last man on earth, will full run of the town by daylight, he could certainly find a real one. I'm just saying.

Carl
by carlh6902
Fri Dec 07, 2018 2:53 am
Forum: Off Topic
Topic: Anyone see their microscope 'in the movies'?
Replies: 6
Views: 2987

Re: Anyone see their microscope 'in the movies'?

Hi all, I would expect to encounter really vintage stands as set props in movie scenes evoking a lone scientist in the laboratory, 19th century plot times. But I just encountered my Nikon-Labophot Pol stand in a recent "B" movie with major film stars! There my stand 'acts scientific' as the main se...
by carlh6902
Sun Nov 18, 2018 4:38 am
Forum: Pictures and Videos
Topic: The elusive Amoeba
Replies: 3
Views: 793

Re: The elusive Amoeba

My quest for the elusive amoeba is described in My Story linked here:

Edit 4/14/2019: Replaced outdated link with a link to the master index, which always contains the most recent versions:

https://drive.google.com/open?id=0B7ckZ ... nFYVDJSRW8

Carl
by carlh6902
Sun Nov 18, 2018 3:37 am
Forum: Pictures and Videos
Topic: Malic Acid crystal explorations in polarized light [Large file warning]
Replies: 10
Views: 1805

Re: Malic Acid crystal explorations in polarized light [Large file warning]

Evan,

Those sure truly some nice images. Tell us about the setup you used for these polarizing images. How did you outfit your BHTU to take these?

Carl
by carlh6902
Wed Jul 25, 2018 4:42 am
Forum: Illumination Techniques
Topic: Nikon Dark field stop on ebay. Anyone familiar with these?
Replies: 8
Views: 2037

Re: Nikon Dark field stop on ebay. Anyone familiar with these?

This was in Microbehunter issue #54:


Edit 4/14/2019: Replaced outdated link with a link to the master index, which always contains the most recent versions:

https://drive.google.com/open?id=0B7ckZ ... nFYVDJSRW8

Carl
by carlh6902
Tue May 22, 2018 3:46 pm
Forum: Microscopes and optics
Topic: Question on Olympus BH-2
Replies: 29
Views: 6291

Re: Question on Olympus BH-2

Sorry, I was too vague. I meant to say there are coarse-focus tension rings on some scopes, like Nikon Labophot 2, which you can unlock. But twisting coarse focus knobs against each other, on some scopes, such as a Nikon inspection scope, will damage focus mechanisms beyond repair. Sorry to resurre...
by carlh6902
Mon Feb 12, 2018 3:35 am
Forum: Beginner's corner
Topic: Is this normal for objective lenses?
Replies: 7
Views: 960

Re: Is this normal for objective lenses?

Lilly, just make sure you don't ever get oil on any of the other objectives. They can be ruined by the oil.

Carl
by carlh6902
Mon Nov 13, 2017 5:40 am
Forum: Microscopes and optics
Topic: Grease for bi-pin contacts of halogen bulbs?
Replies: 1
Views: 826

Re: Grease for bi-pin contacts of halogen bulbs?

The extreme heat these things see in operation greatly accelerates their oxidation. I think something like Dow DC4 could work here, but I'm not sure what it's upper temperature rating is.

Carl
by carlh6902
Mon Oct 23, 2017 4:21 am
Forum: Microscopes and optics
Topic: LOMO compensating optics
Replies: 62
Views: 6258

Re: LOMO compensating optics

American Science and Surplus used to have lomo compensating eyepieces for sale. I bet they still do. Seems like they were $20 each,

Carl
by carlh6902
Wed Oct 04, 2017 4:47 pm
Forum: Microscopes and optics
Topic: Olympus LB Objectives
Replies: 3
Views: 1166

Olympus LB Objectives

I'm not sure where it was, but I helped somebody with this a while back, so I went ahead a wrote it up. It is the procedure for fixing sticky spring-loaded objectives in the Olympus LB series. Edit 4/14/2019: Replaced outdated link with a link to the master index, which always contains the most rece...
by carlh6902
Wed Sep 27, 2017 3:23 am
Forum: For forum members who want to buy and sell equipment
Topic: Olympus BH-2 Parts wanted
Replies: 0
Views: 898

Olympus BH-2 Parts wanted

If you have any old Olympus BH-2 stuff, such as parts (gears, washers, knobs, damaged stages, you name it) that you thought you might never use, or that you thought had no value, contact me. I just happen to be in the market!

Carl
by carlh6902
Tue Sep 19, 2017 4:19 am
Forum: Microscopes and optics
Topic: Olympus BH-2 Binocular Viewing Head
Replies: 1
Views: 717

Olympus BH-2 Binocular Viewing Head

I have released the document covering the Olympus BH2-BI30 binocular viewing head.

Edit 4/14/2019: Replaced outdated link with a link to the master index, which always contains the most recent versions:

https://drive.google.com/open?id=0B7ckZ ... nFYVDJSRW8

Carl
by carlh6902
Sun Sep 17, 2017 1:47 am
Forum: Microscopes and optics
Topic: Olympus BH-2 Sliding Focus Block
Replies: 4
Views: 988

Re: Olympus BH-2 Sliding Focus Block

I don't have an Olympus microscope but I took a peek at your guide to working on the focus block and found it to be very clear and detailed. Excellent photos show every aspect of the process. Just wondering if you sell refurbished scopes? Bill, Thanks for the feedback. I'm slowly working my way thr...
by carlh6902
Tue Sep 05, 2017 4:56 am
Forum: Microscopes and optics
Topic: Olympus BH-2 Sliding Focus Block
Replies: 4
Views: 988

Olympus BH-2 Sliding Focus Block

I have released another chapter in the Olympus BH-2 hardware. This one covers the sliding focus block: Edit 4/14/2019: Replaced outdated link with a link to the master index, which always contains the most recent versions: https://drive.google.com/open?id=0B7ckZ6amci3tcVdXdnFYVDJSRW8 Now to get to w...
by carlh6902
Fri Sep 01, 2017 9:43 pm
Forum: Microscopes and optics
Topic: Question on Olympus BH-2
Replies: 29
Views: 6291

Re: Question on Olympus BH-2

You BHS may have its coarse focus locked down? I cannot remember which direction it goes, but hold still one side of the coarse focus knob and turn the other side. Likely counter clockwise, like all other unlock/release/opening mechanisms. Please wait a day or two, I will take a look for you. Other...