Search found 84 matches

by Mraster2
Wed Oct 21, 2020 6:08 pm
Forum: Specimens, samples and slides
Topic: How to prepare and preserve tardigrades on a slide
Replies: 12
Views: 291

Re: How to prepare and preserve tardigrades on a slide

Interesting. I think this is the full pdf downloadable... The chloral hydrate puts a stop on the Hoyer's formula here in the U.K. that's for sure - an alternative must be out-there though? Hey the link doesn't work can you maybe share it again? Lets see if these links work,,, Published in : Zoologi...
by Mraster2
Sun Oct 04, 2020 2:12 pm
Forum: Specimens, samples and slides
Topic: How to anesthetize Drosophila? Homemade
Replies: 17
Views: 382

Re: How to anesthetize Drosophila? Homemade

Yeast and sugar in warm water in a suitable bottle with a pipeline to the fly chamber, or use another inverted water-filled bottle over water bath to collect the displacing gas. CO2 being heavier than air it can be poured from a filled bottle** into the fly chamber (through a mesh top) PS If using m...
by Mraster2
Fri Sep 11, 2020 9:47 pm
Forum: Pictures and Videos
Topic: Hypotrichia Vulpinarius
Replies: 7
Views: 934

Re: Hypotrichia Vulpinarius

:)
I think Hypotrichia vulpinarius (John Peel 1869) was later assigned Hypotrichia vulpio (Seeleye Span 1989) aka sly or crafty fox.
by Mraster2
Wed Sep 02, 2020 12:23 am
Forum: Pictures and Videos
Topic: The best Camera for Photomicrography
Replies: 24
Views: 1665

Re: The best Camera for Photomicrography

Most, maybe all, Canon cameras have optical anti-alias filters (the dslrs that I am familiar with do) to limit the high frequency content reaching the sensor. I dont know about Nikon, some manufacturers have moved away from them. I guess the Rising is a raw sensor ? No real world filter can perfectl...
by Mraster2
Fri Aug 28, 2020 1:57 am
Forum: Beginner's corner
Topic: Careless Mistakes
Replies: 21
Views: 1298

Re: Careless Mistakes

Oh gosh :( or, Oh crikey :( insert other suitable word !
What can one say? Condolences ?

and I felt such a clutz when I crashed my ebay cheapo achro 20x into my slide, I just broke the cover slip, looks like yours was a proper job ! :(
by Mraster2
Mon Aug 10, 2020 11:10 pm
Forum: Pictures and Videos
Topic: Halteria, and how to annoy them.
Replies: 2
Views: 623

Re: Halteria, and how to annoy them.

Thanks.

Indeed ! Or even with a ZX81 :)

They say Armstrong et.al. got to the moon with less computing power than in a ZX81,

we know there are tardigrades on the moon ,
Now we know what [s]computers[/s] bio-engineering they used to get there :)
by Mraster2
Mon Aug 10, 2020 4:20 pm
Forum: Pictures and Videos
Topic: Halteria, and how to annoy them.
Replies: 2
Views: 623

Halteria, and how to annoy them.

How to annoy a group of Halteria - trap them ! or, to announce in the Victorian style : A bagatelle of Halteria in which a possible avoidance mechanism is observed. Bruce was kind enough to identify these charming little creatures for me. (so charming that I have elevated them to be my microPet #2, ...
by Mraster2
Fri Aug 07, 2020 11:55 am
Forum: Pictures and Videos
Topic: Jumpy wee beastie, IDplease
Replies: 2
Views: 453

Re: Jumpy wee beastie, IDplease

Bruce Taylor wrote:
Fri Aug 07, 2020 3:53 am
Halteria. :)
Ah ! Thank you Bruce.
by Mraster2
Thu Aug 06, 2020 9:11 pm
Forum: Pictures and Videos
Topic: Jumpy wee beastie, IDplease
Replies: 2
Views: 453

Jumpy wee beastie, IDplease

While watching rotifers from the water in the tray of an outdoor plant this active little thing hove into view, and promptly jumped back out of view ! There followed a merry chase for quite some time until I could get it in focus (sometimes!) Best I could do was let it jump about in and out of focus...
by Mraster2
Wed Aug 05, 2020 12:31 pm
Forum: Home-made microscope adaptations
Topic: EOS 4000D modification
Replies: 11
Views: 4631

Re: EOS 4000D modification

Welcome Jody, from me too, thanks for raising this post, as it happens my thoughts were also turning to external power for my canon 60D and if, or not, I should continue using my pride&joy camera for continuous live view microscopy. So both of DaveS' thoughts are interesting, two questions arise : (...
by Mraster2
Tue Aug 04, 2020 1:09 am
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

Thanks for all the helpful advice offered, it has born fruit ! I have my first rotifers. Gosh they are small ! :) Today I learned how to video them with my Canon60D, using a 10x achromat on the CTS body. I learned how to edit in VirtualDub* and how to assemble into a movie, complete with some titles...
by Mraster2
Sat Aug 01, 2020 11:39 am
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

... but I do have an original (I expect) box complete with lock and key (key = a bit rusty :( but it still works, glides even, so a tribute to its craftsperson all those years ago ) If there is any interest I could do pics of the box ... Now that you are are ‘signed-up’ CTS enthusiast : You may enj...
by Mraster2
Sat Aug 01, 2020 12:32 am
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

Here is a beautiful CTS Universal. Love the , probably Mahogany , armrests. Very nice, and its state of polish ! It looks like it has had a better state of captivity than the one I inherited, but to be fair I think, in its early years, mine would have been much treasured, it is just that in its rec...
by Mraster2
Thu Jul 30, 2020 9:40 pm
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

Yep, I think my foot is in greater danger from it than it is from me !
by Mraster2
Thu Jul 30, 2020 8:32 pm
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

Served its purpose, no longer needed
by Mraster2
Thu Jul 30, 2020 8:26 pm
Forum: Pictures and Videos
Topic: Swift 380 40x + NDPL2 samples
Replies: 7
Views: 518

Re: Swift 380 40x + NDPL2 samples

75RR wrote:
Thu Jul 30, 2020 4:36 am
Mraster2 wrote:
Wed Jul 29, 2020 11:48 pm
All we need now is for someone who has the 3/5mp usb Swift cams to come along with some examples :)
Have you contacted a swift dealer to ask for some sample images with their various setups?
Do you deliberately always miss the point or does it come naturally
by Mraster2
Thu Jul 30, 2020 8:20 pm
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

Oh dear.
by Mraster2
Thu Jul 30, 2020 7:17 pm
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

Am i reading that you are going to set up your scope using other objectives and save your CTS objectives? Yes, I will be experimenting with other objectives on the mechanical body of the CTS. The Cooke objs are now set aside for safekeeping. It is good that you alert me the 33 - 45 mm types, thank ...
by Mraster2
Wed Jul 29, 2020 11:48 pm
Forum: Pictures and Videos
Topic: Swift 380 40x + NDPL2 samples
Replies: 7
Views: 518

Re: Swift 380 40x + NDPL2 samples

Thank you.
Found a ref (in German) for Lepocinclis fusca at 15 to 40mm which I guess is microns, so that is good for me to go on.

All we need now is for someone who has the 3/5mp usb Swift cams to come along with some examples :)
by Mraster2
Wed Jul 29, 2020 11:25 pm
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

MichaelG. wrote:
Wed Jul 29, 2020 9:39 pm
Try this: http://www.science-info.net/docs/CTSmod ... e1940s.pdf
Another excellent find, thank you.

And including price lists from the time, fascinating.
Temporary one in April 45 and a 'proper' one in 48, that tells a story as well.
Eyewatering.
by Mraster2
Wed Jul 29, 2020 8:39 pm
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

This, from 1998 mentions a Cooke 45x fluorite: http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artsep98/cts.html The 45x fluorite objective was specifically intended for medical workers and described by 'CTS' (ref. 7, p. 105) as 'the ideal lens for examining bl...
by Mraster2
Wed Jul 29, 2020 7:48 pm
Forum: Pictures and Videos
Topic: Swift 380 40x + NDPL2 samples
Replies: 7
Views: 518

Re: Swift 380 40x + NDPL2 samples

These are mostly for @Mraster2 Meant for evaluating the adapter / scope combination not enjoyment :) But information and learning is hugely enjoyable! Thank you for taking the time to show, that is very interesting and useful, it is very difficult finding examples of Swift capability on the web, ev...
by Mraster2
Wed Jul 29, 2020 3:49 pm
Forum: Illumination Techniques
Topic: Printing Rheinberg filters!
Replies: 6
Views: 892

Re: Printing Rheinberg filters!

lazy no shirlynot, understandably cautious :)
by Mraster2
Wed Jul 29, 2020 3:41 pm
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

Cant see anything about apo on my Cooke things ! How would I know ? The good news is that they are RMS threaded, so I am able to use 2 cheap achros off ebay (more to come) to experiment with on the massive beast (it has a beautiful focus action and stage mechanism) and put the Cookes to one side whi...
by Mraster2
Wed Jul 29, 2020 3:27 pm
Forum: Microscopy accessories
Topic: Swift 380T Filter?
Replies: 15
Views: 1937

Re: Swift 380T Filter?

Opted for 21mp industrial camera with hdmi using .5x adapter. Works great for newby like me. Hi @garastro thanks for your comments, yep, I see your thinking :) do you have a link to the sort of (example of) setup you mention ? I have the reverse situation, I already have a dslr and am wondering abo...
by Mraster2
Tue Jul 28, 2020 6:13 pm
Forum: Illumination Techniques
Topic: Printing Rheinberg filters!
Replies: 6
Views: 892

Re: Printing Rheinberg filters!

I had wondered the same thing and found this interesting article which uses a variable iris to determine the size. https://www.quekett.org/resources/rheinberg It didnt work for me ! I think because my optics were badly aligned in the 'scope I tried it with ( the iris comes in from one side only :( )...
by Mraster2
Tue Jul 28, 2020 6:02 pm
Forum: Pictures and Videos
Topic: Tardigrades with Polarized Light
Replies: 18
Views: 1388

Re: Tardigrades with Polarized Light

I second @MichaelG

Just a thought , might the 40x prob have anything to do with less than perfect enough purity of lineraization ( or whatever the correct term might be :) ) from the film. If you have spare film might two layers ( aligned not xxed ! ) help the null ?
by Mraster2
Tue Jul 28, 2020 5:56 pm
Forum: Microscopes and optics
Topic: A Cooke, Troughton & Simms
Replies: 53
Views: 2886

Re: A Cooke, Troughton & Simms

There is a little diagonal icon in one of the windows. I have never seen a symbol like that before but it looks like it could indicate an oblique setting. The red symbol might be a pol filter. On closer inspection : The 0 is the large clear aperture and there are two un-filled filter-holders (for w...
by Mraster2
Tue Jul 28, 2020 4:11 pm
Forum: Pictures and Videos
Topic: Tardigrades with Polarized Light
Replies: 18
Views: 1388

Re: Tardigrades with Polarized Light

For polarized light, I am just using some old camera filters... one on top of the lamp and one on top of the slide. Ah ! Oh ! I had assumed that the dark/light came from the polarizing and that the colour came from Rheinberg type filters in combo with the polarized, (and previously, usually, seen p...
by Mraster2
Tue Jul 28, 2020 3:26 pm
Forum: Microscopy accessories
Topic: Swift 380T Filter?
Replies: 15
Views: 1937

Re: Swift 380T Filter?

Yes, I had the whole tube in place. But the vignetting was so severe I did not bother taking it any further than that. The NDPL-2 adapter works really well for with the 4x and 10x objectives. I probably will look into other solutions as I start to use the 40x more... I think with the 40x I am notic...