Search found 139 matches

by Tom Jones
Wed May 27, 2020 4:32 am
Forum: Microscopes and optics
Topic: Introductory microscope and with digital adapter?
Replies: 9
Views: 240

Re: Introductory microscope and with digital adapter?

Actually, using that microscope, I think your best bet is to use your cell phone. It's much easier than it sounds. They can certainly shoot 1080p and probably shoot 4k video if you would like. They can also be wired to an external monitor as well. You'll get to see on your screen everything your eye...
by Tom Jones
Mon May 11, 2020 2:30 am
Forum: For forum members who want to buy and sell equipment
Topic: Advice on physician microscope
Replies: 8
Views: 557

Re: Advice on physician microscope

PeteM is right. My vote is for the Olympus BX series. I was a clinical lab supervisor in the second busiest trauma center in California for a long time. In 1999, when we built a new hospital, we switched from AO's and Olympus BH-2s, to Olympus BX-40's in the clinical lab (micro, UA, and hematology)....
by Tom Jones
Thu Apr 30, 2020 2:44 pm
Forum: Beginner's corner
Topic: Specimen ethics
Replies: 42
Views: 2926

Re: Specimen ethics

I suppose I'm lucky in that my career was spent generally in the detection and identification of pathogens in clinical labs. Returning the specimens, or the gazillion things we grew from them, was never a consideration. For some reason, even with something as cute as Giardia, with those nice big "ey...
by Tom Jones
Mon Apr 20, 2020 5:12 pm
Forum: Beginner's corner
Topic: Imaging with different coverglass thickness
Replies: 18
Views: 791

Re: Imaging with different coverglass thickness

At the risk of being obvious, have you asked them?

While someone here might have a good explanation as to why you might want to,- I don't - it's only speculation as to why they are doing it.
by Tom Jones
Thu Mar 26, 2020 3:48 am
Forum: Camera systems and imaging
Topic: Olympus BHS vs modern microscope
Replies: 8
Views: 1809

Re: Olympus BHS vs modern microscope

Antartica, From a practical point of view, having nicer objectives serves no purpose unless, and until, you need them. If you are " not experienced enough to see differences ", buy a decent microscope and learn how to use it. When you are no longer limited by your experience, and can tell the differ...
by Tom Jones
Fri Mar 13, 2020 3:10 pm
Forum: Beginner's corner
Topic: Discovery of Microorganisms + Advice on Research Microscope
Replies: 33
Views: 14557

Re: Discovery of Microorganisms + Advice on Research Microscope

Filters can just drop in on top of the light port. No extra holder is necessary. The little filter holder that goes in the front of the lamp house holds the same size filters. I prefer dropping them in on the light port on the occasions where I use one not included in a condenser. If you feel like s...
by Tom Jones
Wed Mar 11, 2020 3:22 am
Forum: Beginner's corner
Topic: Discovery of Microorganisms + Advice on Research Microscope
Replies: 33
Views: 14557

Re: Discovery of Microorganisms + Advice on Research Microscope

Could anyone comment on this listing: https://www.ebay.com/itm/OLYMPUS-BH2-TR ... Sw7t9eVZoD With four DPlans and a trinoc head, and free shipping, it looks like a pretty good price to me, and I have a BHS. Importantly, the seller says it's tested, works fine, and backs it up by accepting returns u...
by Tom Jones
Tue Mar 10, 2020 3:15 am
Forum: Beginner's corner
Topic: Discovery of Microorganisms + Advice on Research Microscope
Replies: 33
Views: 14557

Re: Discovery of Microorganisms + Advice on Research Microscope

To insert a little reality here, while you might, eventually find something new, it is extremely unlikely . :? In order to find something new, you must generally be able to identify all of the currently known organisms of the type you are studying. Why? Unless you can identify potentially each piece...
by Tom Jones
Tue Mar 10, 2020 2:20 am
Forum: Identification help
Topic: Good Book for Microbe Identification?
Replies: 7
Views: 3794

Re: Good Book for Microbe Identification?

Guide to Microlife, Rainis and Russel: https://www.amazon.com/Guide-Microlife-Science-Life-Environmental/dp/0531112667/ref=sr_1_1?keywords=guide+to+microlife+rainis&qid=1583805774&sr=8-1 Free-Living Freshwater Protozoa, a Color Guide, Patterson: https://www.amazon.com/Free-Living-Freshwater-Protozoa...
by Tom Jones
Fri Feb 28, 2020 3:37 pm
Forum: Beginner's corner
Topic: Immersion Oil Recommendation
Replies: 2
Views: 1682

Re: Immersion Oil Recommendation

I've always preferred a 50:50 mixture of high and low viscosity for normal work in clinical labs, and that's what I use at home. :D

Buying both to mix, while a bit more expensive, has the side benefit of allowing you to try all three and stay with what you find most convenient for the work you do.
by Tom Jones
Fri Feb 21, 2020 2:43 pm
Forum: Camera systems and imaging
Topic: What is a good video camera to use with a microscope?
Replies: 20
Views: 7728

Re: What is a good video camera to use with a microscope?

No. The HDMI output while recording can be in 4K. If you do not have a 4K monitor, it will down sample the signal to full HD, and tell you on screen it is doing so. For external (Ninja, etc.) recording you can get 4K with 10 bit 4:2:2 color as well. You can download the regular and extended manuals ...
by Tom Jones
Fri Feb 07, 2020 2:16 am
Forum: Camera systems and imaging
Topic: What is a good video camera to use with a microscope?
Replies: 20
Views: 7728

Re: What is a good video camera to use with a microscope?

So do the cameras recommended here stay on, with HDMI live view, plugged in (ac) indefinitely? The Panasonic GH4 stays on for me, with HDMI out to a monitor, recording continuously in 4K (which is about as hard on battery life as you can get), for between 1 hr 10 min and 1 hr 20 min on a 64GB card ...
by Tom Jones
Tue Jan 21, 2020 5:27 pm
Forum: Illumination Techniques
Topic: Making DIC Prisms
Replies: 14
Views: 4078

Re: Making DIC Prisms

I've been looking for more or less the same information for some time. I want to assess prism compatibility, both within a manufacturer's system, and between manufacturers, without actually having to do direct, and therefore very expensive, comparisons. For example, will a Zeiss prism system work we...
by Tom Jones
Sat Jan 11, 2020 9:25 pm
Forum: Camera systems and imaging
Topic: BH2 BHS MTV
Replies: 37
Views: 5246

Re: BH2 BHS MTV

Tom, What you need is a Diagnostic Instruments PA1-10A adapter. It's a direct replacement for the Olympus Photomicro Adapter L, but instead of the Olympus camera mount has a T-ring thread so you can mount any camera you can get a T-ring adapter for. I've used them on both the BH series (BHS), and th...
by Tom Jones
Sun Jan 05, 2020 3:35 am
Forum: Microscopes and optics
Topic: Different ways to set up DIC (NIC) on BH-2 Microscopes
Replies: 30
Views: 3211

Re: Different ways to set up DIC (NIC) on BH-2 Microscopes

Tom, Just when you think you have things figured out. :o Thanks for adding the last photos. I hadn't seen the differences in the intermediate tube either. Mine is the BH2 version. Pretty subtle differences. I hope the prisms are the same. Sometimes it's handy to go through a dealer! Pricey, but you ...
by Tom Jones
Sat Jan 04, 2020 2:24 pm
Forum: Microscopes and optics
Topic: Different ways to set up DIC (NIC) on BH-2 Microscopes
Replies: 30
Views: 3211

Re: Different ways to set up DIC (NIC) on BH-2 Microscopes

Hi Tom, The Stephanoceros video was just normal DIC, no tricks of any kind. I was actually just checking a fresh plankton net collection before I went to a Science Night demo at a local high school when I found it. All the setup and shooting was done in about 30 minutes as I had to leave for the dem...
by Tom Jones
Sat Jan 04, 2020 4:23 am
Forum: Microscopes and optics
Topic: Different ways to set up DIC (NIC) on BH-2 Microscopes
Replies: 30
Views: 3211

Re: Different ways to set up DIC (NIC) on BH-2 Microscopes

Damn. I'm sorry. I didn't look at the last picture apparently, as it was mostly a response to the intermediate tube price. I paid about $850 for my intermediate tube. I've never seen that type condenser before. Apparently I got lucky when I bought mine! Since that one doesn't have a dovetail on the ...
by Tom Jones
Fri Jan 03, 2020 5:08 am
Forum: Microscopes and optics
Topic: Different ways to set up DIC (NIC) on BH-2 Microscopes
Replies: 30
Views: 3211

Re: Different ways to set up DIC (NIC) on BH-2 Microscopes

Tom, A word to the wise... eat Ramen for a while :? , sell your kids :shock: , just don't sell the DCD, or the DIC set for that matter. Dedicated dark field condensers are better than simple stops, and you're going to like dark field. It's worth learning to swap condensers quickly and efficiently to...
by Tom Jones
Thu Jan 02, 2020 6:00 am
Forum: Microscopes and optics
Topic: Different ways to set up DIC (NIC) on BH-2 Microscopes
Replies: 30
Views: 3211

Re: Different ways to set up DIC (NIC) on BH-2 Microscopes

Tom, The Dealcorner intermediate tube is the BH2-NA. It's also too expensive, so he should get to keep it. :o This is why I think it's too expensive: https://www.ebay.com/itm/Olympus-NIC-Phase-Condenser-set-for-DIC-Microscope-setup-in-good-working-order/232936455851?hash=item363c183eab:g:ZL0AAOSwPCZ...
by Tom Jones
Tue Dec 24, 2019 3:10 am
Forum: Microscopes and optics
Topic: Olympus BH2 eye pieces
Replies: 6
Views: 667

Re: Olympus BH2 eye pieces

PeteM's right about the DPlans. I used them in hematology and microbiology in a trauma center lab for a long time. They're nice lenses and relatively inexpensive. Get the WHK eyepieces. Their higher eye point is easier to use over a long period of time.

Tom
by Tom Jones
Mon Nov 25, 2019 5:07 pm
Forum: Beginner's corner
Topic: thinking out loud here - moral thoughts
Replies: 21
Views: 3319

Re: thinking out loud here - moral thoughts

Ignoring for the moment the fact that everything we do each day involves the death of a lot of organisms in one way or another... :shock: so many that the number of them in your sample doesn't even reach the level of a rounding error... :D How many organisms are you going to squash to death :oops: w...
by Tom Jones
Sun Nov 24, 2019 4:15 pm
Forum: Microscopes and optics
Topic: There is DIC, then there is DIC
Replies: 10
Views: 1415

Re: There is DIC, then there is DIC

ALL transmitted light DIC requires polarized light and two Nomarski prisms. Reflected light DIC requires only one as the light passes through it twice. All of the prisms are expensive and limited as to the number of objectives they will work with, often being designed to work with one specific objec...
by Tom Jones
Sat Nov 23, 2019 10:26 pm
Forum: Camera systems and imaging
Topic: How to attach camera to Olympus BH2?
Replies: 23
Views: 7283

Re: How to attach camera to Olympus BH2?

I use this Fotodiox C-m4/3 adapter with the U-PMTVC for my BHS and SZH: https://www.adorama.com/fdcmft.html?gclsrc=aw.ds&gclid=CjwKCAiAzuPuBRAIEiwAkkmOSLDVCc7HsAdeIxWC6Q-6pdBsB9dC3WFL3sfe-VSt2j1RVSrDn_iH3xoCLt4QAvD_BwE It screws down flush against the PMTVC adapter, but works fine with the GH4. The ...
by Tom Jones
Thu Nov 21, 2019 5:25 pm
Forum: Camera systems and imaging
Topic: How to attach camera to Olympus BH2?
Replies: 23
Views: 7283

Re: How to attach camera to Olympus BH2?

Some of the available micro 4/3 C-mount adapters don't like the flat top on the U-PMTVC and won't screw on completely before they bottom out. Mine just barely makes it.

That could make the adapter-camera sensor distance too long even with the adapter fully screwed together.
by Tom Jones
Thu Nov 21, 2019 3:34 pm
Forum: Camera systems and imaging
Topic: Help attaching full frame DSLR to Olympus BX40
Replies: 19
Views: 3177

Re: Help attaching full frame DSLR to Olympus BX40

John, You'll need a PE 2.5x projection lens (for 35 mm full-frame cameras), a U-SPT photo tube (or U-DPT if you want to mount two cameras) to mount on top of the trinoc head, and a camera adapter such as the Diagnostic Instruments PA1-10A with a Canon T-ring mounted on top of that. The DA instrument...
by Tom Jones
Thu Nov 21, 2019 8:17 am
Forum: Camera systems and imaging
Topic: How to attach camera to Olympus BH2?
Replies: 23
Views: 7283

Re: How to attach camera to Olympus BH2?

Are you saying you cannot get the camera by itself in focus, or cannot get the camera focus and eyepiece focus to match?

If the camera image won't come into focus, something is wrong.
by Tom Jones
Sun Nov 10, 2019 9:48 pm
Forum: Camera systems and imaging
Topic: How to attach camera to Olympus BH2?
Replies: 23
Views: 7283

Re: How to attach camera to Olympus BH2?

It can be. The U-PMTVC has screw threads that will allow you to adjust it's length a bit to make it parfocal. Adjust focus in the right eyepiece, match it with the left, then adjust the U-PMTVC (screw it in or out) until the camera focus matches what you see in the eyepieces. I use a -H focusing eye...