MicrobeHunter.com Microscopy Forum

Aha … I see now that the female dovetail is detachable !!

… I had assumed it to be fixed in place.

That could make your life much easier.

MichaelG.

You will need the appropriate ‘male’ dovetail to fit into that

See here for an example: http://www.alanwood.net/olympus/eyepiec ... l#dovetail
… that’s for Olympus, but it nicely illustrates the principle

What is your microscope ?

MichaelG.

You might like this, Dennis : https://www.exploringbuildinghistory.co ... -industry/

MichaelG.

My question for Michael G., and apo, and all...?) Are we with global shutter cameras making the expensive: " shutterless camras obsolete...as shutterless cameras do not have 'global shutters'? That’s an interesting philosophical question ‘charlie g’ I think the broad answer is NO … because the roll...

Extraordinary video … but presumably a fairly ordinary event

It’s humbling to think how little of ‘what goes on’ must escape the attention of mankind.

Thanks

MichaelG.

tlansing wrote: ↑

Tue Mar 14, 2023 3:54 pm

Does anyone have any videos or links to videos of protists taken using a global shutter camera?

Personally … I have taken nothing of interest yet
[for other reasons, my project is way behind schedule]

MichaelG.

A great set of images, Frank … thanks for sharing them.

I was instantly reminded of a great photograph by Otto Croy, which is probably what started my interest in macro.

MichaelG.

Hence my carefully chosen wording for the ‘Subject’

MichaelG.

SWmicro wrote: ↑

Thu Mar 09, 2023 3:06 pm

Meanwhile I have found the old Sciento web site on archive.com
https://web.archive.org/web/20180208122 ... nto.co.uk/
Looks like they ceased trading Feb/Mar 2021
That is a shame, very interesting catalogue.

That’s a very useful find, Thanks !!

MichaelG.

dirigibil wrote: ↑

Thu Mar 09, 2023 2:58 pm

Why is having a global shutter a big deal for imaging in microscopy? Excuse my ignorance.

Nicely explained by Apochronaut
The motion of cillia is usually very poorly captured by the more common ‘rolling shutter’

MichaelG.

This may be of interest to the uninitiated:
https://youtu.be/3HhdO11lD04

Although undistorted video of cilliates should be more so

MichaelG.

Announced today:
A Global Shutter camera for the Raspberry Pi

https://thepihut.com/products/raspberry ... 7915b454b9

MichaelG.

.
Edit: Useful info, here: https://www.raspberrypi.com/news/new-ra ... er-camera/

SWmicro wrote: ↑

Wed Mar 08, 2023 10:57 pm

MichaelG. wrote: ↑

Wed Mar 08, 2023 8:33 pm

61 Bury Old Road, M45 6TB

Thanks for that find,
a google shows it is now "Glatt Butchers"

Or the Welcome Inn

https://findit.wigantoday.net/company/1299400662999040

MichaelG.

If it’s any help … The listed address is 61 Bury Old Road, M45 6TB

https://earth.app.goo.gl/tRT168
#googleearth

MichaelG.

The Canada Balsam may have yellowed, but at least it still looks beautifully homogeneous
… orders of magnitude better than the dreaded NuMount crystallisation !!

MichaelG.

.

https://www.nhm.ac.uk/hosted_sites/acar ... mmary.html

Somewhat bewildered … I’ve found Mr Jackson‘s blogpost, offering free download of the ‘Compendium Edition’ but no obvious reference to a Volume III
http://bettermicroscopy.blogspot.com/

MichaelG.
.

Correction: There is a reference at 01-July-2018

I recently came across this very interesting paper on “Silver Staining”
https://www.ableweb.org/biologylabs/wp- ... ggoner.pdf

… should be very suitable.

MichaelG.

Further to apochronaut’s helpful note … I would just add that

what's meant by "high dry magnification"

is simply high magnification using a dry objective

… it’s just a jargon phrase which slips nicely off the tongue.

MichaelG.

Here is the patent, in the names of McArthur and CTS : https://worldwide.espacenet.com/patent/ ... DGB863102A

… Downloadable via the ‘three vertical dots’ menu at upper-right of the page.

MichaelG.

Not wrong so far as I am aware …
the ‘parent page’ that I linked doesn’t say it explicitly, but

MichaelG.

I think the parent page to the one you linked might have all the available clues

https://microscope-antiques.com/mcarthurs.html

and I wish you ‘Happy Hunting’

MichaelG.

Technology evolves, of course … but Just as a reminder of my opening line ^^^ I would be very happy to see this thread kept up to date regarding ‘state of the art’ MichaelG. . P.S. __ I didn’t notice a first publication date for the piece originally linked, it may already be years out of date.

I don't think that summary is fully accurate--my understanding anyway is that the green gap reflects a legitimate technical challenge rather than a lack of interest. I think their point was that technical challenges would be addressed if there was sufficient market interest. It’s a matter of how yo...

Are there directly replaceable LED bulbs that will fit this screw mount? The thread looks to be machined rather than formed … which suggests that the lamps were custom-made. Some dimensions would be useful if we are hoping to ‘reverse engineer’ the design … but yes, I agree That arrangement, with L...

Technology evolves, of course … but here is a useful primer: https://www.photonics.com/Articles/Light-Emitting_Diodes_A_Primer/a36706 The paragraph about Green LEDs is particularly interesting in light of [ sorry for the inevitable pun ] the current discussion about imaging bacteria. MichaelG. . Edi...

Thanks for the picture, Bram

… it’s worth the proverbial ‘thousand words’

MichaelG.

Sure Squintsalot wrote: ↑

Tue Feb 07, 2023 7:03 am

Is there such a thing as a bicycle-like pump that generates vacuum? […] Any ideas?

Yes … Find a ‘vintage’ bicycle pump [most modern ones will probably be less conveniently made] … dismantle it and reverse the leather cup-washer which forms the piston/valve.

Hey Presto !!

MichaelG.

See also:
https://www.microbehunter.com/microscop ... =9&t=17823

MichaelG.

… which is why I was suggesting Green LED [520nm being common] as the optimum light-source. Hmm. Or 546nm maybe... . I would be happy with either … If we get to the point where it matters, I think we will have won already. MichaelG. . Ref . __ From Toshiba: . 02F935FF-2C76-4464-9E1C-1AA195D98B1B.png

The sensor in the D500 has been identified as: Sony IMX321 Exmor CMOS APS-C Sensor https://camspex.com/comparison.php?camera1=Sony+Alpha+a6600&camera2=Nikon+D500 … and Nikon advertises the fact that the D7500 uses the same sensor as the D500 So far, so good … but there are several incarnations of Ex...