Search found 2383 matches

by MichaelG.
Tue Sep 22, 2020 5:38 pm
Forum: Resources (online, books etc.)
Topic: Alva H. Bennett - Phase Microscopy; Principles and Applications
Replies: 5
Views: 147

Re: Alva H. Bennett - Phase Microscopy; Principles and Applications

hans wrote:
Tue Sep 22, 2020 6:41 am

I also downloaded the PDF initially, but it appears to have had some additional processing/compression applied that blurred out thin parts of letters, quite an eyesore to read. ...
Yes, unfortunately, I agree

MichaelG.
by MichaelG.
Tue Sep 22, 2020 5:31 am
Forum: Resources (online, books etc.)
Topic: Alva H. Bennett - Phase Microscopy; Principles and Applications
Replies: 5
Views: 147

Re: Alva H. Bennett - Phase Microscopy; Principles and Applications

Thanks for the link, Hans

... it looks a decent scan, too
PDF version duly downloaded to the trusty iPad

MichaelG.
by MichaelG.
Sat Sep 19, 2020 11:09 am
Forum: Miscellaneous
Topic: Emotional Attatchment To Microbes
Replies: 11
Views: 177

Re: Emotional Attatchment To Microbes

Hi everyone! Weird title, I know, but I'm 100% serious. I wanna know if anyone gets weirdly attatched to the microbes on their slide, cause that's turning out to be quite a problem for me. […] ~ Tenshi I think you might find this previous discussion of interest, Tenshi http://www.microbehunter.com/...
by MichaelG.
Sat Sep 19, 2020 11:00 am
Forum: Beginner's corner
Topic: What can I actually expect to see?
Replies: 11
Views: 385

Re: What can I actually expect to see?

May I just comment that this was an excellent opening question
... and a very helpful response from micro

Nice example of how a forum can work !

MichaelG.
by MichaelG.
Wed Sep 16, 2020 9:08 am
Forum: For forum members who want to buy and sell equipment
Topic: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube
Replies: 24
Views: 401

Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

mrsonchus wrote:
Wed Sep 16, 2020 6:19 am
Hi, a couple of very low-priced ones ...
.

It will be interesting to see what they sell for

MichaelG.
by MichaelG.
Wed Sep 16, 2020 8:39 am
Forum: Digital processing
Topic: Altami studio price anyone?
Replies: 11
Views: 335

Re: Altami studio price anyone?

This page mentions purchase and refers to Altami Ltd : http://altamisoft.com/purchase/ This one includes a link to Altami Ltd : http://altamisoft.com/ ... which takes you here : http://altami.ru/ All looks respectable, but you will need translation skills to get much further ... click at lower left,...
by MichaelG.
Tue Sep 15, 2020 8:51 pm
Forum: Microscopes and optics
Topic: Watson and Sons Stereo with obtuse irreversible design?
Replies: 6
Views: 155

Re: Watson and Sons Stereo with obtuse irreversible design?

.

This ... from one of the Little Imp CD series, suggests that it is just awkward by design:
.
m115310d.jpg
m115310d.jpg
BE1C3502-D5A8-47D3-BBF5-7F6D1483B053.jpeg (205.11 KiB) Viewed 123 times
.

MichaelG.

.

Ref. M82 here: http://www.microscopy-uk.org.uk/Little-Imp/index.html
by MichaelG.
Tue Sep 15, 2020 10:45 am
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: Stray light cap for Leitz dry darkfield condenser
Replies: 41
Views: 3190

Re: Wanted: Stray light cap for Leitz dry darkfield condenser

I wait with ‘bated breath

... exciting stuff !

MichaelG.
by MichaelG.
Mon Sep 14, 2020 11:11 am
Forum: Pictures and Videos
Topic: Freshwater Dinoflagellates
Replies: 9
Views: 230

Re: Freshwater Dinoflagellates

75RR wrote:
Mon Sep 14, 2020 7:35 am
Great catch and video. I too thought they were only marine ... thanks for the info!
+1 for the lovely video !

The author of the Wikipedia page tells us:
dinoflagellates are mostly marine plankton, but they also are common in freshwater habitats.
... and now we see it to be true.

MichaelG.
by MichaelG.
Mon Sep 14, 2020 9:14 am
Forum: Illumination Techniques
Topic: Stereo Microscope : Fluorescence Adapter
Replies: 51
Views: 11545

Re: Stereo Microscope : Fluorescence Adapter

Yes, getting hold of Nile Red is the hard part. As you note, it costs around $30 to $40 for around 10 to 50 mg minimum order. We use around 20 micro liters of 1 mg/ml stock NR dissolved in methanol or rubbing alcohol stain for 5 ml of sea water. So one order goes a long way. In our case, we had a g...
by MichaelG.
Sun Sep 13, 2020 8:25 am
Forum: Illumination Techniques
Topic: Stereo Microscope : Fluorescence Adapter
Replies: 51
Views: 11545

Re: Stereo Microscope : Fluorescence Adapter

I note this topic was raised back in October 2018, but the discussion petered out after a month and several ideas seemed to have gone untested. We have used a simple LED flashlight (torch) to excite fluorescence in microplastics in sea water samples stained with Nile Red. This we achieved with a $8...
by MichaelG.
Fri Sep 11, 2020 9:10 pm
Forum: Microscopes and optics
Topic: How clean is your solvent!
Replies: 8
Views: 714

Re: How clean is your solvent!

Thanks for the offer, Kirby
... All O.K. via the library.

Very interesting ... ‘though the IPA performance is rather worrying !

MichaelG.
by MichaelG.
Fri Sep 11, 2020 6:13 am
Forum: Microscopes and optics
Topic: How clean is your solvent!
Replies: 8
Views: 714

Re: How clean is your solvent!

Thanks for the reference ... hopefully I can access it via the library:
https://www.osapublishing.org/ao/viewme ... 3875&seq=0

MichaelG.
by MichaelG.
Fri Sep 11, 2020 5:56 am
Forum: Microscopes and optics
Topic: Brass Rack and pinions designed to run dry?
Replies: 14
Views: 966

Re: Brass Rack and pinions designed to run dry?

I also found a product once that is applied before your lubricant and is supposed to keep it from ending up where you don't want it. Kind of like a primer of sorts. These are known as ‘ Eplilames ’ ... used in watches, and available from several suppliers illustrated example: http://www.unimatec-eu...
by MichaelG.
Thu Sep 10, 2020 11:00 pm
Forum: My microscope
Topic: Carl Zeiss Jena Nr. 154618 help!
Replies: 12
Views: 925

Re: Carl Zeiss Jena Nr. 154618 help!

dzarren wrote:
Thu Sep 10, 2020 10:22 pm
Unfortunatly, the 7x eyepiece is gone, and would have been very useful.
Just an idle thought ...
I wonder if the relatively modern LOMO 7x eyepiece uses the same optical prescription
... it wouldn’t surprise me.

MichaelG.
by MichaelG.
Thu Sep 10, 2020 8:10 pm
Forum: Microscopes and optics
Topic: Brass Rack and pinions designed to run dry?
Replies: 14
Views: 966

Re: Brass Rack and pinions designed to run dry?

The manual of my old Wild microscope threatens me not to dare to lubricate anything. After 50 years I would disobey... The Whale oil was the officially recommended lubricant - impossible to find now. . Here’s an interesting page: https://www.scran.ac.uk/packs/exhibitions/learning_materials/webs/40/...
by MichaelG.
Thu Sep 10, 2020 5:42 pm
Forum: Microscopes and optics
Topic: Affordable microscope bulb for Zeiss
Replies: 11
Views: 1024

Re: Affordable microscope bulb for Zeiss

Finally, I found this! https://www.amazon.co.uk/gp/product/B003XW2IJS/ref=ox_sc_act_title_delete_1?smid=A3P5ROKL5A1OLE&psc=1 For what it’s worth ... here is the spec. sheet for the Philips 5761: https://www.lighting.philips.co.uk/api/assets/v1/file/content/fp923931110103-pss-en_gb/ADAM-201610171904...
by MichaelG.
Thu Sep 10, 2020 5:36 pm
Forum: Microscopes and optics
Topic: Affordable microscope bulb for Zeiss
Replies: 11
Views: 1024

Re: Affordable microscope bulb for Zeiss

Just out of curiosity ... Does anyone understand why the Axiolab lamp is listed as 25W when the actual bulb illustrated is clearly marked 30W
:?:

https://www.itvinas.com/replacement-bul ... 503486.htm

MichaelG.
by MichaelG.
Thu Sep 10, 2020 12:33 pm
Forum: Specimens, samples and slides
Topic: Diatom selection experience
Replies: 38
Views: 4122

Re: Diatom selection experience

Sorry, Doron ... I’m confused by your latest post

It quotes my response to a previous one, but that seems irrelevant to what you are saying.

Apologies if I am missing something :oops:

MichaelG.
by MichaelG.
Wed Sep 09, 2020 10:53 pm
Forum: Resources (online, books etc.)
Topic: Laboratory Arts [re. Scientific Instruments]
Replies: 1
Views: 667

Laboratory Arts [re. Scientific Instruments]

An excellent little book, from 1908 https://archive.org/details/cu31924031246964 MichaelG. LABORATORY ARTS A TEACHER'S HANDBOOK DEALING WITH MATERIALS AND TOOLS USED IN THE CONSTRUCTION, ADJUSTMENT, AND REPAIR OF SCIENTIFIC INSTRUMENTS BY GEORGE H. WOOLLATT Ph.D., Fl.C. PRINCIPAL, MUNICIPAL TECHNICA...
by MichaelG.
Wed Sep 09, 2020 9:59 pm
Forum: Camera systems and imaging
Topic: Reichert 410 "Microstar IV" head -- corrective element present in binocular path but not trinocular camera port
Replies: 144
Views: 11472

Re: Reichert 410 "Microstar IV" head -- corrective element present in binocular path but not trinocular camera port

Would also be nice if it could also move out of the way to mess with the eyepiece, then be put back precisely into the same position without a lot of messing around. If you’re up for a bit more construction work, Hans That can be achieved with a simple Kinematic mounting arrangement known as Cone/G...
by MichaelG.
Wed Sep 09, 2020 9:26 pm
Forum: Specimens, samples and slides
Topic: Diatom selection experience
Replies: 38
Views: 4122

Re: Diatom selection experience

[…] it appears that for some reason, wet diatoms attach better (to glass) than dry diatoms. Perhaps, this holds for gently cleaned frustules, that still contain trace amounts of protein or other organic residue that may function as adhesive. But it worked for me with chemically cleaned fossil diato...
by MichaelG.
Wed Sep 09, 2020 6:09 pm
Forum: Microscopes and optics
Topic: Brass Rack and pinions designed to run dry?
Replies: 14
Views: 966

Re: Brass Rack and pinions designed to run dry?

I can’t give you anything like a definitive answer ... but can say that I use just a little of either ‘White Lithium Grease’ or ‘Copper Ease’ anti-seize compound.
Neither of these has [yet] caused any noticeable problem.

I look forward with interest to seeing what others use.

MichaelG.
by MichaelG.
Wed Sep 09, 2020 8:39 am
Forum: My microscope
Topic: Zeiss Photomicroscope optics
Replies: 1
Views: 348

Re: Zeiss Photomicroscope optics

Fascinating

MichaelG.
by MichaelG.
Wed Sep 09, 2020 7:43 am
Forum: Camera systems and imaging
Topic: Reichert 410 "Microstar IV" head -- corrective element present in binocular path but not trinocular camera port
Replies: 144
Views: 11472

Re: Reichert 410 "Microstar IV" head -- corrective element present in binocular path but not trinocular camera port

hans wrote:
Wed Sep 09, 2020 4:58 am
Finally, some less theoretical progress:
Very devious, Hans ... I like it !

MichaelG.
by MichaelG.
Wed Sep 09, 2020 5:46 am
Forum: Illumination Techniques
Topic: WHY no side illumination in darkfield? (noob)
Replies: 8
Views: 892

Re: WHY no side illumination in darkfield? (noob)

... let's see a picture or two. Pictures of the actual instrument would be useful ... but here is Brunel’s SP200 page for starters: http://www.brunelmicroscopes.co.uk/research-microscope.html . and the SP200 accessories: http://www.brunelmicroscopessecure.co.uk/acatalog/SP200-Accessories.html Micha...
by MichaelG.
Tue Sep 08, 2020 11:26 am
Forum: Introduce yourself
Topic: Another Hello from England
Replies: 2
Views: 396

Re: Another Hello from England

Welcome aboard, Alan

... This might be useful: https://roslistonastronomy.uk/ritland-i ... microscope

MichaelG.
by MichaelG.
Sun Sep 06, 2020 8:42 am
Forum: Pictures and Videos
Topic: Arcella discoides
Replies: 6
Views: 453

Re: Arcella discoides

cuxlander wrote:
Sat Sep 05, 2020 7:13 pm
I just bought me a Zeiss Plan-Neofluar 63/125 Oil and would like to show two of my first oil-immersion-photos:
Clearly a wise buy ... and in good hands !!

MichaelG.
by MichaelG.
Sun Sep 06, 2020 6:51 am
Forum: Miscellaneous
Topic: A boy and his atom: the world's smallest movie
Replies: 3
Views: 316

Re: A boy and his atom: the world's smallest movie

Don’t miss the “making of” ...
https://youtu.be/xA4QWwaweWA

... or the “arm-waving” technical description of the process :geek:
https://youtu.be/rNf-A3m6HVo

MichaelG.
by MichaelG.
Thu Sep 03, 2020 8:46 am
Forum: Introduce yourself
Topic: Hello from England
Replies: 4
Views: 319

Re: Hello from England

Welcome, Mike

MichaelG.