Search found 2585 matches

by MichaelG.
Thu Jan 21, 2021 9:26 pm
Forum: Specimens, samples and slides
Topic: Staining lichen
Replies: 3
Views: 37

Re: Staining lichen

MicroBob wrote:
Thu Jan 21, 2021 9:01 pm
Hi Mike,
on our website you can find Schömmers "Kryptogramenpraktikum": http://www.mikrohamburg.de/Schoemmer/Schoemmer.pdf
The name of the book is difficult to decipher ...
:lol:

MichaelG.
by MichaelG.
Thu Jan 21, 2021 11:11 am
Forum: Microscopy accessories
Topic: reassemble the 16mm moticam Lens adapter
Replies: 3
Views: 53

Re: reassemble the 16mm moticam Lens adapter

Any joy, Manuel ?

MichaelG.
by MichaelG.
Wed Jan 20, 2021 11:40 pm
Forum: Camera systems and imaging
Topic: Chinese Unbranded 48mp C-mount Industrial HDMI Camera
Replies: 11
Views: 148

Re: Chineses Unbranded 48mp C-mount Industrial HDMI Camera

Forgive my ignorance please, John ... but can you explain where the 4K claim comes from ?

The back of the camera mentions 1080P and 2K , but not 4K

MichaelG.

.

https://en.wikipedia.org/wiki/High-defi ... ideo_modes
by MichaelG.
Wed Jan 20, 2021 1:27 pm
Forum: Microscopes and optics
Topic: Zeiss Photomic III - Canon
Replies: 2
Views: 58

Re: Zeiss Photomic III - Canon

You may find this [with its several links] useful: http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artnov07/dw-pm3.html ... and, regarding the 100w bulb; have a look at the final page of this document: http://roslistonastronomy.uk/wp-content/uploads/2018/03/Micr...
by MichaelG.
Tue Jan 19, 2021 10:05 pm
Forum: Microscopy accessories
Topic: reassemble the 16mm moticam Lens adapter
Replies: 3
Views: 53

Re: reassemble the 16mm moticam Lens adapter

Sorry, Manuel ... I can’t really help : But my guess would be that the design is based on the Cooke Triplet, or the Zeiss Tessar If you can post some photos of the elements and spacers we may be able to do better Meanwhile, have a look here : https://www.photo.net/discuss/threads/triplets-tessars-so...
by MichaelG.
Mon Jan 18, 2021 11:41 am
Forum: Miscellaneous
Topic: Tiny flower preserved in Amber
Replies: 4
Views: 231

Re: Tiny flower preserved in Amber

I live in a place near one of the world's biggest amber fields ... . Then I think you will appreciate the beauty of this bangle, which I bought for my wife about 20 years ago. .... each piece is like a segment of an orange. . CAFC717A-6163-4879-AC06-C6D54A7FE26D.jpeg . Have you tried photographing ...
by MichaelG.
Mon Jan 18, 2021 10:08 am
Forum: Camera systems and imaging
Topic: Did anyone ever bought the CAS-39 CamAdapter Kit in Europe
Replies: 2
Views: 57

Re: Did anyone ever bought the CAS-39 CamAdapter Kit in Europe

Quoting from your linked page:
.
Available only through Microscope.com, the CamAdapter Kit is used extensively by hobbyists and academics alike.
.

... I would presume no-one has purchased it elsewhere.
[unless there is some ‘badge engineering’ involved]


MichaelG.
by MichaelG.
Sun Jan 17, 2021 10:28 am
Forum: Beginner's corner
Topic: Antiflex
Replies: 2
Views: 88

Re: Antiflex

by MichaelG.
Sun Jan 17, 2021 9:12 am
Forum: Microscopes and optics
Topic: Silicone immersion objectives - any experience?
Replies: 29
Views: 465

Re: Silicone immersion objectives - any experience?

.
Thanks for sharing your thinking [and also the patent link], Viktor
... please keep us informed of your progress!

MichaelG.
by MichaelG.
Sun Jan 17, 2021 12:20 am
Forum: Microscopes and optics
Topic: Silicone immersion objectives - any experience?
Replies: 29
Views: 465

Re: Silicone immersion objectives - any experience?

This is way out of my league, Viktor ... but may be of interest:
https://www.olympus-lifescience.com/en/ ... l-imaging/

MichaelG.
by MichaelG.
Thu Jan 14, 2021 8:23 pm
Forum: Illumination Techniques
Topic: Phase contrast setup in Vickers M15 (not M15C)
Replies: 9
Views: 247

Re: Phase contrast setup in Vickers M15 (not M15C)

.

Predictably excellent work, Mike

MichaelG
by MichaelG.
Tue Jan 12, 2021 6:05 pm
Forum: Illumination Techniques
Topic: Phase contrast setup in Vickers M15 (not M15C)
Replies: 9
Views: 247

Re: Phase contrast setup in Vickers M15 (not M15C)

The system diagram is here: https://dlib.york.ac.uk/yodl/app/image/ ... ref=search

Play with the buttons at bottom-right of the picture

MichaelG.
by MichaelG.
Tue Jan 12, 2021 2:39 pm
Forum: Resources (online, books etc.)
Topic: printable 'calibration" image for checking stereoscopes?
Replies: 3
Views: 230

Re: printable 'calibration" image for checking stereoscopes?

See post #10 in this recent thread:
viewtopic.php?f=12&t=8900&p=92078&hilit ... ful#p92078

There was no evident interest, so I didn’t bother trying to produce anything better

MichaelG.
by MichaelG.
Tue Jan 12, 2021 11:17 am
Forum: Resources (online, books etc.)
Topic: The Insects - An Outline of Entomology
Replies: 1
Views: 164

Re: The Insects - An Outline of Entomology

An excellent find, thank you !!

MichaelG.
by MichaelG.
Tue Jan 12, 2021 11:13 am
Forum: For forum members who want to buy and sell equipment
Topic: FOR SALE: Zeiss Axiocam MRM
Replies: 3
Views: 368

Re: FOR SALE: Zeiss Axiocam MRM

I’m the wrong side of the pond to consider buying it ... but I’ve found the brochure for info.
https://bcf.technion.ac.il/wp-content/u ... 0065_E.pdf

MichaelG.
by MichaelG.
Sun Jan 10, 2021 10:56 pm
Forum: Camera systems and imaging
Topic: Are photo eyepieces needed?
Replies: 10
Views: 670

Re: Are photo eyepieces needed?

That’s a useful note, Hans
Thanks for the link.

MichaelG.
by MichaelG.
Sun Jan 10, 2021 12:39 am
Forum: Beginner's corner
Topic: pair of eyepieces reflecting different colours ?
Replies: 2
Views: 185

Re: pair of eyepieces reflecting different colours ?

hello, when looking at some microscope eyepieces I have some that seem to reflect different colors when viewing the surface of the lens under a bright light . does anyone know why for example I have a pair of wild 10x/21 one looks green the other blue and similar differences with a pair of generic ...
by MichaelG.
Fri Jan 08, 2021 10:04 pm
Forum: Specimens, samples and slides
Topic: Radiolaria material in block form - how to break it up!
Replies: 3
Views: 150

Re: Radiolaria material in block form - how to break it up!

Many thanks for the inspiration, Bob ... Much appreciated !!

MichaelG.
by MichaelG.
Fri Jan 08, 2021 8:53 pm
Forum: Specimens, samples and slides
Topic: Diatom Shop experiences
Replies: 7
Views: 1408

Re: Diatom Shop experiences

@Michael: Do you need a starting point how to go ahead with you radiolaria block? . Yes please, Bob ... anything that you can offer using relatively non-hazardous chemicals I have ‘disintegrated’ a few pieces using strong Acetic Acid, but have yet to devise a protocol for separating the radiolaria,...
by MichaelG.
Fri Jan 08, 2021 8:44 pm
Forum: Beginner's corner
Topic: What magnification does AmScope MD130 1.3MP camera have?
Replies: 10
Views: 471

Re: What magnification does AmScope MD130 1.3MP camera have?

MicroBob wrote:
Fri Jan 08, 2021 8:16 pm

The sensor of this camera is small and without additional optics it will probably always give a tiny crop from the middle of the image. So perhaps one can say that it uses just 1/40th of the available image. :shock:
.

That was my impression, Bob

MichaelG.
by MichaelG.
Fri Jan 08, 2021 7:22 pm
Forum: Specimens, samples and slides
Topic: Diatom Shop experiences
Replies: 7
Views: 1408

Re: Diatom Shop experiences

My only experience was an eMail exchange, when I asked for advice about extracting radiolarians from Barbados earth.
The answer was [reasonably enough] that his method was his intellectual property.

MichaelG.
by MichaelG.
Fri Jan 08, 2021 7:14 pm
Forum: Beginner's corner
Topic: What magnification does AmScope MD130 1.3MP camera have?
Replies: 10
Views: 471

Re: What magnification does AmScope MD130 1.3MP camera have?

. According to the Amscope website: https://www.amscope.com/1-3-mega-pixel-usb-live-video-microscope-imager-digital-camera.html . Sensor Size 1/3" format (4.61mm x 3.69mm) . Compare those dimensions with the size of the intermediate image, and you can probably convince yourself that it is 40x Michae...
by MichaelG.
Thu Jan 07, 2021 6:44 pm
Forum: Beginner's corner
Topic: Ignoring the warning ⚠️
Replies: 13
Views: 546

Re: Ignoring the warning ⚠️

This might be the relevant datasheet : https://www.osram.com/appsj/pdc/pdf.do? ... MP_1006707

But this one [for a 12v version] usefully includes a spectrum : https://docs.rs-online.com/be10/A700000006468680.pdf

MichaelG.
by MichaelG.
Thu Jan 07, 2021 6:20 am
Forum: Microscopes and optics
Topic: Uncommon Leitz Objective
Replies: 14
Views: 529

Re: Uncommon Leitz Objective

Have a look at this, Toni : http://www.microbehunter.com/microscopy-forum/viewtopic.php?f=25&t=7818&p=68938&hilit=michaelg.+low+power#p68938 As I’m sure you [as a photographer] will appreciate: It is relatively easy to make a good long-focus lens, but much more difficult to design one with specific ...
by MichaelG.
Wed Jan 06, 2021 9:26 pm
Forum: Pictures and Videos
Topic: Antique Diatom Arrangement
Replies: 12
Views: 534

Re: Antique Diatom Arrangement

That’s beautiful, Kurt

Thanks for sharing your images.

MichaelG.
.
.
http://www.microscopy-uk.org.uk/mag/ind ... rdman.html
by MichaelG.
Wed Jan 06, 2021 7:44 pm
Forum: Miscellaneous
Topic: Highly recommended and interesting article.
Replies: 1
Views: 286

Re: Highly recommended and interesting article.

Excellent ! ... Thank You

MichaelG.
by MichaelG.
Wed Jan 06, 2021 7:43 pm
Forum: Microscopes and optics
Topic: Uncommon Leitz Objective
Replies: 14
Views: 529

Re: Uncommon Leitz Objective

From the same page:
Tube Lengths
Tube Lengths
0DC244C7-CF1F-4893-8670-8A24CB03468E.jpeg (121.14 KiB) Viewed 433 times
.
Note: a simple lens, of long focal length, should be quite tolerant of tube length.

MichaelG.
by MichaelG.
Wed Jan 06, 2021 2:53 pm
Forum: Microscopes and optics
Topic: Uncommon Leitz Objective
Replies: 14
Views: 529

Re: Uncommon Leitz Objective

The brochure from which the list comes is dedicated to Leitz polarizing microscopes in general ... SM Pol, Ortholux Pol but also the rare Panphot Pol. The SM microscope I know for sure has a tube length of 170mm ... Unfortunately the pdf file is quite large, even compressed. If you PM me your email...
by MichaelG.
Wed Jan 06, 2021 1:32 pm
Forum: Microscopes and optics
Topic: Uncommon Leitz Objective
Replies: 14
Views: 529

Re: Uncommon Leitz Objective

tonikon wrote:
Wed Jan 06, 2021 12:45 pm
...but mine has engraved "170"...I suppose It's for tube lenght...
What is the tube length of the instrument which your list belongs to ... I wonder ?

MichaelG.