Search found 107 matches

by Tom Jones
Sun Sep 22, 2019 4:00 pm
Forum: For forum members who want to buy and sell equipment
Topic: NO LONGER WANTED Olympus intermediate polariser
Replies: 31
Views: 788

Re: WANTED Olympus intermediate polariser

The BH-2 simple pol adapter won't fit the BX. The dovetail is too small. It will actually go on, but isn't centered. The bigger problem is that the BX head dovetail is too big to fit the BH-2 adapter. I just checked. You would need to use a BH-2 head with it, and figure out how to center it... You h...
by Tom Jones
Fri Aug 30, 2019 3:53 am
Forum: Beginner's corner
Topic: Compound scope for home education
Replies: 18
Views: 1046

Re: Compound scope for home education

opticnewb,

Where are you located? Maybe someone is close enough to provide a bit of assistance.

Tom
by Tom Jones
Sat Aug 10, 2019 2:57 pm
Forum: My microscope
Topic: My new Olympus BHS BH2
Replies: 39
Views: 3513

Re: My new Olympus BHS BH2

PeteM, No, I don't know off hand. I've never tried the BH system at all. The BX and BH2 condensers will interchange in the mounts, and I've been told the removable prisms are the same size, but whether they will interchange optically or not I don't know. Given the variability in the BX series - oil ...
by Tom Jones
Sat Aug 10, 2019 4:10 am
Forum: My microscope
Topic: My new Olympus BHS BH2
Replies: 39
Views: 3513

Re: My new Olympus BHS BH2

Hi Dan,

Here are the photos of the opened BH-2 DIC condenser.
Pretty simple. If you use a small phillips instead of a JIS, just very very careful as it won't fit quite as well as it should.

Tom
by Tom Jones
Sat Aug 10, 2019 1:53 am
Forum: My microscope
Topic: My new Olympus BHS BH2
Replies: 39
Views: 3513

Re: My new Olympus BHS BH2

Hi Dan, A little experimenting this afternoon to answer your questions. This presumes you have the condenser with the fixed DIC prisms and phase rings, labeled "NIC/Phase Contrast" I installed the mag changer above the DIC intermediate tube, directly under the head, and it works fine, at least visua...
by Tom Jones
Fri Aug 09, 2019 4:16 pm
Forum: Microscopes and optics
Topic: Olympus BX and BH stage holders
Replies: 2
Views: 675

Re: Olympus BX and BH stage holders

Olympus pol stages are centerable. They also offer centerable objective turrets for the BHT/BHS/BX-50, etc. scopes with removable turrets. Not the BHTU or BX-40 unless you have the rare, removable turret adapter, for the BX-40. A pol scope where you couldn't center specimen rotation with the optical...
by Tom Jones
Thu Aug 08, 2019 4:00 pm
Forum: My microscope
Topic: My new Olympus BHS BH2
Replies: 39
Views: 3513

Re: My new Olympus BHS BH2

Hi Dan, Give me a couple of days to check on the Mag changer/DIC compatibility and your other DIC questions. I'm off to Hollywood this morning to do some video photomicrography training with a film maker friend in her studio, so I won't be able to play with my BHS until at least tomorrow or Saturday...
by Tom Jones
Thu Aug 08, 2019 4:48 am
Forum: My microscope
Topic: My new Olympus BHS BH2
Replies: 39
Views: 3513

Re: My new Olympus BHS BH2

First, I'd suggest you peruse this site: http://www.krebsmicro.com/ Charlie Krebs is the BHS-DIC Photomicrography Guru. Pretty much all of your questions are answered there. The projection eyepieces are designed to stay away from the outer edges of the field where image quality can be a bit less. Th...
by Tom Jones
Thu Jul 25, 2019 2:24 pm
Forum: Beginner's corner
Topic: Objectives
Replies: 8
Views: 1518

Re: Objectives

I'd MUCH rather have a good 20x than a good 100x. Amateurs rarely need that much magnification. Good 60x objectives are nice, but more rare so more costly for good ones, and generally not necessary. I removed the 100x objectives from my seven BH-2 outreach scopes several years ago. They all have nic...
by Tom Jones
Tue Jul 16, 2019 2:51 pm
Forum: Microscopes and optics
Topic: How to make a lambda wave plate?
Replies: 16
Views: 1105

Re: How to make a lambda wave plate?

Look at the 50mm x x50mm. Full, 1/2 and 1/4 wave. $18 each for the full wave, $12 each for the 1/2 and 1/4. Click on "Specifications and Documents" below each description to get the full data, including thickness. Put them below the condenser as they are not optically clear enough to go between the ...
by Tom Jones
Thu Jul 04, 2019 11:34 pm
Forum: Pictures and Videos
Topic: Mayfly Nymph
Replies: 14
Views: 1739

Re: Mayfly Nymph

Thanks Roldorf and MichaelG! About a 30 second clip from that ended up on Discovery Canada's science show Daily Planet, in an episode of Ziyology, hosted by Ziya Tong and Dan Riskin. Just basking in all the glory here. :roll:

Tom
by Tom Jones
Thu Jul 04, 2019 1:22 am
Forum: Beginner's corner
Topic: Do you think that this is a fair comparation between this two microscope (Bx46 and Axio Lab A1)?
Replies: 14
Views: 1066

Re: Do you think that this is a fair comparation between this two microscope (Bx46 and Axio Lab A1)?

Call the Olympus and Zeiss reps and have them bring out a demo of the scopes you are considering, and leave it/them for a week or two so you and your techs can see how you like it. Ask them what they would recommend, too. Get a bid on what you want. It will probably be for less than list. I don't kn...
by Tom Jones
Sat May 04, 2019 3:09 am
Forum: Identification help
Topic: Unknown blood cells in blood sample
Replies: 6
Views: 2039

Re: Unknown blood cells in blood sample

:roll: You should stop doing tests on yourself if you don't know what you're doing. :?

Perhaps a perusal of this might help: https://onlinelibrary.wiley.com/doi/boo ... 1444398595 8-)

On the other hand, I've heard Gwyneth Paltrow's Goop might be good for this... :twisted:
by Tom Jones
Sun Apr 14, 2019 3:47 pm
Forum: Pictures and Videos
Topic: Tips on Buying a Microscope and suggestions for What to look at
Replies: 16
Views: 4094

Re: Tips on Buying a Microscope and suggestions for What to look at

Very comprehensive and very nicely done! Not to be too picky, but just below your image of two older microscopes, you indicate the Unitron microscope is on the left, while it is actually shown on the right. ;)
by Tom Jones
Tue Apr 02, 2019 3:39 pm
Forum: Camera systems and imaging
Topic: How to attach camera to Olympus BH2?
Replies: 7
Views: 2612

Re: How to attach camera to Olympus BH2?

I use that very setup to project, essentially direct project as the NFK 3.3x and 0.3x lens in the U-PMTVC essentially cancel magnifications, onto the sensor of my Panasonic GH4 for 4K video. Since the GH4 is mirrorless, a C-mount adapter fits fine, and I get the necessary final corrections in the NF...
by Tom Jones
Fri Mar 08, 2019 3:52 am
Forum: Microscopes and optics
Topic: 100x NCG oil: what is it used for?
Replies: 5
Views: 983

Re: 100x NCG oil: what is it used for?

Almost all clinical labs use standard 100x 0.17 oil immersion objectives, with oil and without cover slips, for blood smears, body fluid smears, or gram stains for that matter. Lower power objectives are used with a thin film of oil substituting for the cover slip there as well. Cover slips are cost...
by Tom Jones
Fri Feb 08, 2019 1:36 am
Forum: Pictures and Videos
Topic: Aeolosoma sp.
Replies: 11
Views: 1723

Re: Aeolosoma sp.

Nice. It's even budding!
by Tom Jones
Sat Feb 02, 2019 12:36 am
Forum: Beginner's corner
Topic: Picture magnification question?
Replies: 8
Views: 2294

Re: Picture magnification question?

One other thing to consider is to be sure the picture/video format you want to use is the same one you use to calibrate. Most cameras will use different pixel dimensions on the sensor for each available resolution and/or aspect ratio. That can rather dramatically change the number of pixels for a gi...
by Tom Jones
Mon Jan 28, 2019 5:05 am
Forum: Beginner's corner
Topic: Eye floaters
Replies: 14
Views: 4151

Re: Eye floaters

GOLGO13, Ignoring your floaters is something that is pretty much universally recommended. It's generally good advice for most people. However, if they are really debilitating, you actually have a couple of choices to get rid of them. It will be a bit of a slog to convince the average ophthalmologist...
by Tom Jones
Wed Jan 09, 2019 5:17 pm
Forum: Off Topic
Topic: This FREE 6-week course in how to design experiments in biological research..
Replies: 2
Views: 2738

Re: This FREE 6-week course in how to design experiments in biological research..

You're right Billt. That does look interesting. Thanks! For those not aware, in addition to classes like this one, iBiology has many video lectures on various aspects of biology research. They have also a very nice, and very complete, lecture series on microscopy techniques: https://www.ibiology.org...
by Tom Jones
Mon Jan 07, 2019 3:33 pm
Forum: Microscopes and optics
Topic: Olympus BH-2 Question. Lamp intensity adjuster. Faulty?
Replies: 17
Views: 4476

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

Before you get too carried away, you might try squirting contact cleaner on the slider (through the slider opening) and then moving the knob back and forth the full range several times. Dirt on the slider can make contact intermittent at best. I've resurrected several this way.
by Tom Jones
Tue Jan 01, 2019 3:30 am
Forum: Beginner's corner
Topic: Recommendations for a good text book to aid and explain what I am seeing.
Replies: 5
Views: 2844

Re: Recommendations for a good text book to aid and explain what I am seeing.

My edition of Ward and Whipple is from 1959. Quite a few are available used on Amazon: https://www.amazon.com/Fresh-Water-Biology-George-Chandler-Whipple/dp/047123298X Take a look at the download 1918 version first to see if you think it will meet your needs. Don't worry about being location specifi...
by Tom Jones
Mon Nov 12, 2018 4:21 am
Forum: For forum members who want to buy and sell equipment
Topic: For Sale: Zeiss Junior
Replies: 4
Views: 1327

Re: For Sale: Zeiss Junior

wstenberg, What/who was your source for the Chinese oculars? Any idea how well they would work with Zeiss objectives? I have several ex-university Standards that all had delaminated oculars I need to try to replace. Since they'll be donated to a middle or high school after refurbishment, Zeiss ocula...
by Tom Jones
Fri Oct 19, 2018 2:31 pm
Forum: Home-made microscope adaptations
Topic: Monitor mount
Replies: 7
Views: 3397

Re: Monitor mount

Radazz,

Interesting setup. I like it.
I see you also have a copy of Shaw on your bookshelf. 8-)
I bought mine when it came out, have read it many times and learned a lot!

Tom
by Tom Jones
Mon Oct 15, 2018 2:55 pm
Forum: Beginner's corner
Topic: pls help with recc. a microscope
Replies: 19
Views: 3115

Re: pls help with recc. a microscope

Hi Bob, Remember, a bit of digital zoom isn't much of an issue when you start with a 4K sensor and are down sampling to HD for the output anyway. It is still pretty much guaranteed to be better than an eyepiece camera at 640 x 480 with their hideously slow frame transfer rates. As a cure for your MH...
by Tom Jones
Mon Oct 15, 2018 2:24 am
Forum: Beginner's corner
Topic: pls help with recc. a microscope
Replies: 19
Views: 3115

Re: pls help with recc. a microscope

Hi Bob, I'm not sure it's in all of them, but it's certainly in most of them. It's been around for quite a while. iOS has it's own method that works fine too, with iPhones and iPads. Here's a list: http://www.mhltech.org/devices.aspx and another: https://hudly.zendesk.com/hc/en-us/articles/115003409...
by Tom Jones
Sun Oct 14, 2018 4:11 am
Forum: Beginner's corner
Topic: pls help with recc. a microscope
Replies: 19
Views: 3115

Re: pls help with recc. a microscope

Lisa, Get Lorez's microscope. Get a good cell phone adapter, mount the cell phone on the microscope eyepiece (horizontally please - NO vertical video as you loose too much screen real estate and resolution), hook up an HDMI adapter from the cell phone to the HDMI input for the white board. Voila! Yo...
by Tom Jones
Sat Sep 22, 2018 3:59 am
Forum: Illumination Techniques
Topic: Better circular compass cutter
Replies: 11
Views: 2488

Re: Better circular compass cutter

I use a 3-50mm punch set from Mayhew that I like a great deal. Not cheap at all, but if you're a perfectionist, this is as good as I've seen. It will even cut concentric circles: https://www.amazon.com/Mayhew-66010-Met ... 82QRI?th=1