Search found 4027 matches
- Tue Dec 05, 2017 9:27 pm
- Forum: Microscopes and optics
- Topic: Oil immersion or higher power eyepieces?
- Replies: 25
- Views: 10256
Re: Oil immersion or higher power eyepieces?
One example quoted states that a 15x eyepiece with a x40 objective gives 600x magnification while still providing acceptable resolution. Since I have no experience using either, I wanted to ask members what the experience is like with using higher power eyepieces when compared to using oil immersio...
- Mon Dec 04, 2017 10:12 pm
- Forum: Beginner's corner
- Topic: Swift-Binoculars
- Replies: 18
- Views: 8515
Re: Swift-Binoculars
My point was not that Swift weren't Made in Japan rather, it was whether they had manufacturing facilities there. In other words did Swift ever own a microscope factory, as is more or less claimed by the current owners of the trademark, or did they simply have an existing company, make scopes for t...
- Mon Dec 04, 2017 8:49 pm
- Forum: Beginner's corner
- Topic: Swift-Binoculars
- Replies: 18
- Views: 8515
Re: Swift-Binoculars
Here is the manual for the Swift M3200 ... printed in Japan
https://www.swift-microscopeworld.com/I ... Manual.pdf
Admittedly not a guarantee that the instrument was made there; but a substantial hint.
MichaelG.
https://www.swift-microscopeworld.com/I ... Manual.pdf
Admittedly not a guarantee that the instrument was made there; but a substantial hint.
MichaelG.
- Mon Dec 04, 2017 4:28 pm
- Forum: Beginner's corner
- Topic: Swift-Binoculars
- Replies: 18
- Views: 8515
Re: Swift-Binoculars
Interesting how some companies likes to put a spin on things. The Texas website explicitly states " for over fifty years Swift Instruments has been a global leader in the manufacture and production of quality microscopes", when in fact it sounds like the current company does not manufacture but the...
- Sun Dec 03, 2017 8:41 pm
- Forum: Pictures and Videos
- Topic: VAC2 pics
- Replies: 5
- Views: 3100
Re: VAC2 pics
The monochrome image is a beauty !!
MichaelG.
MichaelG.
- Sun Dec 03, 2017 8:05 pm
- Forum: Microscopes and optics
- Topic: Nikon "condenser holder"
- Replies: 6
- Views: 3589
Re: Nikon "condenser holder"
Thank you! I will go try it now. If I am unable to find that "one match" is there a way to spot it? Or is it a process of feel? Just a matter of feel ... Count how many starts there are; then pick one at random: If it doesn't feel good just back-out, keep a little pressure on, and and let it drop i...
- Sun Dec 03, 2017 7:08 pm
- Forum: Microscopes and optics
- Topic: Nikon "condenser holder"
- Replies: 6
- Views: 3589
Re: Nikon "condenser holder"
That looks like a multi-start left hand thread.
There will probably be one 'match' that works slightly better than the others, but it should just screw in anti-clockwise.
MichaelG.
There will probably be one 'match' that works slightly better than the others, but it should just screw in anti-clockwise.
MichaelG.
- Thu Nov 30, 2017 9:47 pm
- Forum: Pictures and Videos
- Topic: Pollen spines sectioned
- Replies: 13
- Views: 4659
Re: Pollen spines sectioned
Wonderful work, John
... Sorry, I missed the opening post on Monday.
Oh for a Scanning Electron Microscope !!
MichaelG.
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They do look rather like Espresso Machines, but ...
http://www.phenom-world.com/microscopes
A nice man showed me the Pro X version, but I would be happy to have any of them.
... Sorry, I missed the opening post on Monday.
Oh for a Scanning Electron Microscope !!
MichaelG.
.
.
They do look rather like Espresso Machines, but ...
http://www.phenom-world.com/microscopes
A nice man showed me the Pro X version, but I would be happy to have any of them.
- Sun Nov 26, 2017 5:09 pm
- Forum: Beginner's corner
- Topic: Pond aquarium
- Replies: 26
- Views: 10771
Re: Pond aquarium
There are books specifically for the industry, but I don't have a copy of any and cannot remember any titles. A web search may offer some suggestions. lorez Thanks for that ... I will have a look around. MichaelG. . . These look like good places to start: http://www.biologicalwasteexpert.com/useful...
- Sun Nov 26, 2017 9:18 am
- Forum: Beginner's corner
- Topic: Pond aquarium
- Replies: 26
- Views: 10771
Re: Pond aquarium
Whatever critters disappear are always magically replaced with others, I do a lot of work with wastewater treatment plants and this is the hallmark of their evaluations. When a certain species is present they know a certain condition exists. lorez That must be an interesting exercise ... Is there a...
- Sat Nov 25, 2017 11:11 pm
- Forum: Pictures and Videos
- Topic: Mousse
- Replies: 19
- Views: 8851
Re: Mousse
Gorgeous images !!
MichaelG.
MichaelG.
- Sat Nov 25, 2017 8:29 pm
- Forum: Microscopes and optics
- Topic: LOMO compensating optics
- Replies: 62
- Views: 23485
Re: LOMO compensating optics
I'll welcome any suggestions on ways to compare the corrections, I have pretty much just been flailing about on my own (obviously). ... The classic visual test of Achromatism seems to be Carpenter's "Disc of Deal" Sorry ... I haven't had a chance to try it yet. MichaelG. . . https://archive.org/det...
- Sat Nov 25, 2017 3:30 pm
- Forum: Microscopes and optics
- Topic: Another new objective - Leitz x2.5 this time!
- Replies: 19
- Views: 7716
Re: Another new objective - Leitz x2 this time!
Excellent result, John [in both senses]
'fraid I can only currently see your first image though.
MichaelG.
'fraid I can only currently see your first image though.
MichaelG.
- Sat Nov 25, 2017 9:06 am
- Forum: Microscopes and optics
- Topic: Rational round sensor camera anyone?
- Replies: 3
- Views: 2339
Re: Rational round sensor camera anyone?
The optimum technical solution would, I think, be a square format sensor
But, as PeteM mentions; viewing formats are typically rectangular, and tending towards wider aspect ratios.
Given square pixels: Circular sensors are really not a credible solution.
MichaelG.
But, as PeteM mentions; viewing formats are typically rectangular, and tending towards wider aspect ratios.
Given square pixels: Circular sensors are really not a credible solution.
MichaelG.
- Wed Nov 22, 2017 8:00 pm
- Forum: Off Topic
- Topic: HAPPY THANKSGIVING,
- Replies: 3
- Views: 3741
Re: HAPPY THANKSGIVING,
A Cornucopia, no less
What a delightful picture and good sentiment.
MichaelG.
What a delightful picture and good sentiment.
MichaelG.
- Wed Nov 22, 2017 7:24 am
- Forum: Pictures and Videos
- Topic: Mousse
- Replies: 19
- Views: 8851
Re: Mousse
Very beautiful images
MichaelG.
MichaelG.
- Wed Nov 22, 2017 7:16 am
- Forum: Microscopes and optics
- Topic: Just bought Leitz objective...
- Replies: 38
- Views: 13527
Re: Just bought Leitz objective...
Tried just about every combination of 'scope and condenser etc but no joy. Knowing how superb the Leitz 'scopes are it seems clear that the answer would be the fabled 'large-field condenser' which I suspect will be very hard to find indeed. I feel your pain, John Page 15 of the Ortholux II manual h...
- Tue Nov 21, 2017 10:20 am
- Forum: Beginner's corner
- Topic: LeicaMicrosystems Sp8x WLL Confocal stage movement
- Replies: 9
- Views: 4554
Re: LeicaMicrosystems Sp8x WLL Confocal stage movement
Sorry but this is way out of my league ... My best suggestion is to have a look at https://micro-manager.org There is an active forum; and I do recall seeing a very impressive demo of mosaic acquisition, by Märzhäuser, using that software. Do please let us know how you get on with this interesting p...
- Mon Nov 20, 2017 6:42 pm
- Forum: Pictures and Videos
- Topic: Velcro
- Replies: 4
- Views: 2213
Re: Velcro
Great images !!
MichaelG.
MichaelG.
- Mon Nov 20, 2017 5:15 pm
- Forum: Microscopes and optics
- Topic: Just bought Leitz objective...
- Replies: 38
- Views: 13527
Re: Just bought Leitz objective...
Excellent !!Its a special condenser to this objective
Thanks for posting the photo.
Do you know [even approximately] the focal length?
MichaelG.
- Mon Nov 20, 2017 8:12 am
- Forum: Microscopes and optics
- Topic: Just bought Leitz objective...
- Replies: 38
- Views: 13527
Re: Just bought Leitz objective...
The Orthoplan's condenser (600 series lower element and body 'bathtub') fills the x4 objective fine with the top lens swung out, but I suspect the x1 objective may need the condenser out as well... At the risk of labouring this, John [a foolish thing for me to do, given that I have never used the o...
- Mon Nov 20, 2017 7:22 am
- Forum: Microscopes and optics
- Topic: Just bought Leitz objective...
- Replies: 38
- Views: 13527
Re: Just bought Leitz objective...
p.s. do you think it may work for whole tissue (i.e. not flat and sectioned) with incident illumination too to some extent? That would be very useful also. Yes, I think it should be fine. You may, however, find it useful to experiment with lighting arrangements; because there is quite a high risk o...
- Sun Nov 19, 2017 11:38 pm
- Forum: Microscopes and optics
- Topic: Just bought Leitz objective...
- Replies: 38
- Views: 13527
Re: Just bought Leitz objective...
Ah, yes I see Michael, will closing the iris raise contrast also, which can be handy at such a low magnification I think? Probably not [much], John ... but you may find that closing it just a little does improve things [as it does on many camera lenses]. That said: One would hope that Leitz careful...
- Sun Nov 19, 2017 11:15 pm
- Forum: Microscopes and optics
- Topic: Just bought Leitz objective...
- Replies: 38
- Views: 13527
Re: Just bought Leitz objective...
Aha Michael - yes, I see - erm... what does one do with the built-in iris diaphragm. :oops: Sorry that's a stupid question but I've never encountered an objective with this feature. How is it used in practice Michael? Full aperture will give you the highest resolution, and the brightest image, but ...
- Sun Nov 19, 2017 10:40 pm
- Forum: Microscopes and optics
- Topic: Just bought Leitz objective...
- Replies: 38
- Views: 13527
Re: Just bought Leitz objective...
John, I stand to be corrected, but I am sure that 'built-in iris diaphragm' is not the same thing as 'correction collar' ... I think you will find that the diaphragm serves exactly the same purpose as the one in a camera lens. I have never seen a low power objective that needed a correction collar. ...
- Fri Nov 17, 2017 12:30 pm
- Forum: Pictures and Videos
- Topic: Black ant from LOMO 10X APO
- Replies: 5
- Views: 3353
Re: Black ant from LOMO 10X APO
Thank you ... that clarifies nicely. The main reason that I asked was because I could see no reference to an eyepiece. >> It is now clear that you did not use one ... I also did not use the eyepiece in the home made camera mount tube. ... which makes the performance of the objective all the more imp...
- Fri Nov 17, 2017 9:32 am
- Forum: Pictures and Videos
- Topic: Black ant from LOMO 10X APO
- Replies: 5
- Views: 3353
Re: Black ant from LOMO 10X APO
That looks very promising indeed !!
Some technical details of the set-up would be appreciated.
MichaelG.
Some technical details of the set-up would be appreciated.
MichaelG.
- Fri Nov 17, 2017 8:50 am
- Forum: Pictures and Videos
- Topic: A herd of rotifers!
- Replies: 17
- Views: 7438
Re: A herd of rotifers!
I'm pretty sure that you are right, Pat
... see my note [Wednesday] on your other thread.
viewtopic.php?f=6&t=5450
It certainly got me thinking though !!
MichaelG.
... see my note [Wednesday] on your other thread.
viewtopic.php?f=6&t=5450
It certainly got me thinking though !!
MichaelG.
- Wed Nov 15, 2017 10:58 am
- Forum: About the website, the magazine and this forum
- Topic: Olympus adpater need
- Replies: 4
- Views: 10802
Re: Olympus adpater need
Thumbnail version
- Wed Nov 15, 2017 7:11 am
- Forum: Pictures and Videos
- Topic: One last rotifer video
- Replies: 8
- Views: 4623
Re: One last rotifer video
And there is also some light on the question left from the previous thread . It is not evident while the rotifer is contracted, but at 2:20 the one shows a round bubble at the cloaca, which then abruptly contracts and disappears. Thanks for that observation ... Your analysis makes good sense. Micha...