Search found 2074 matches

by MichaelG.
Sat Jul 11, 2020 4:32 pm
Forum: Microscopes and optics
Topic: Fun Little Invertoscop D Conversion
Replies: 4
Views: 72

Re: Fun Little Invertoscop D Conversion

BramHuntingNematodes wrote:
Sat Jul 11, 2020 2:30 pm
Are there special thin-bottomed petri dishes one can use with an inverted microscopes?
.
Yes ... but the price makes your stand look a really good bargain

https://www.thermofisher.com/order/cata ... 80#/150680

MichaelG.
by MichaelG.
Sat Jul 11, 2020 4:28 pm
Forum: Microscopes and optics
Topic: Fun Little Invertoscop D Conversion
Replies: 4
Views: 72

Re: Fun Little Invertoscop D Conversion

BramHuntingNematodes wrote:
Sat Jul 11, 2020 2:30 pm
Well, if that's what happens to 47-year-old black anodized aluminum I would venture a yes.
.
It’s certainly not unknown.

MichaelG.
by MichaelG.
Sat Jul 11, 2020 2:00 pm
Forum: Microscopes and optics
Topic: Fun Little Invertoscop D Conversion
Replies: 4
Views: 72

Re: Fun Little Invertoscop D Conversion

Looks good [and a bargain-buy], Brad

I’m curious about those Purple spacers though ... Are they perhaps black anodised which has faded ?

MichaelG.
by MichaelG.
Fri Jul 10, 2020 10:25 pm
Forum: Pictures and Videos
Topic: 4
Replies: 2
Views: 52

Re: 4

That’s very impressive

I see it raised, but I’m guessing that it’s a cavity [and paired for cross-eyed viewing]

MichaelG.
by MichaelG.
Fri Jul 10, 2020 9:27 am
Forum: Microscopes and optics
Topic: Fixed Köhler
Replies: 45
Views: 945

Re: Fixed Köhler

Strictly speaking [which is increasingly uncommon] :

Neo means New ... in the sense of ‘fresh/young/recent’

... Very conveniently covers a multitude of sins

MichaelG.
by MichaelG.
Fri Jul 10, 2020 8:51 am
Forum: Microscopes and optics
Topic: Roughly when did microscope manufacturers stop making their own glass?
Replies: 9
Views: 119

Re: Roughly when did microscope manufacturers stop making their own glass?

http://webcache.googleusercontent.com/search?q=cache:opaw81P94zYJ:www.germanheritage.com/biographies/atol/bausch.html+&cd=2&hl=en&ct=clnk&gl=us apparently more specifically the summer of 1986. Interesting timeline, Bram . 1985 - July 25: Glass Plant closes. 1989 - May: Company announced plans for a...
by MichaelG.
Thu Jul 09, 2020 8:02 pm
Forum: Microscopes and optics
Topic: Leitz PL 1x
Replies: 10
Views: 140

Re: Leitz PL 1x

Sabatini wrote:
Thu Jul 09, 2020 3:50 pm
I'm going to try to buy both of them, MichaelG, when I have them at home I'll let you know.
Thanks for that

MichaelG.
by MichaelG.
Thu Jul 09, 2020 12:52 pm
Forum: Microscopes and optics
Topic: Fixed Köhler
Replies: 45
Views: 945

Re: Fixed Köhler

To save interested parties having to type out the sentence in a translator, here it is: […] . Thanks for that ... So give or take one hyphen, and the small but significant difference between ‘ is ’ and ‘ should be ’: it’s not adjustable. ... Seems like a reasonable description of ‘fixed’ MichaelG. ...
by MichaelG.
Thu Jul 09, 2020 9:18 am
Forum: Microscopes and optics
Topic: Leitz PL 1x
Replies: 10
Views: 140

Re: Leitz PL 1x

If I were you, I'd buy them both for those very reasonable prices and worry about the logistics later. I had to look back at the opening post, to spot the prices :oops: ... couldn’t agree more, John As for the logistics, Sabatini : If you buy both, but only need one, I would be interested in the ot...
by MichaelG.
Thu Jul 09, 2020 6:58 am
Forum: My microscope
Topic: Just Received my Hayear HY500B camera
Replies: 18
Views: 250

Re: Just Received my Hayear HY500B camera

< duplicate post deleted >

MichaelG.
by MichaelG.
Thu Jul 09, 2020 6:55 am
Forum: My microscope
Topic: Just Received my Hayear HY500B camera
Replies: 18
Views: 250

Re: Just Received my Hayear HY500B camera

I noticed that your photo of the microacope has the same general noise as the camera--is there an added processing step here that might be adding that? The new camera is taking good pictures and I have a feeling the noise isn't inherent to it. A very good point, Scarodactyl ... Don added his photo ...
by MichaelG.
Wed Jul 08, 2020 11:02 pm
Forum: My microscope
Topic: Just Received my Hayear HY500B camera
Replies: 18
Views: 250

Re: Just Received my Hyear HY500B camera

Looking good, Don

MichaelG.
by MichaelG.
Wed Jul 08, 2020 5:12 pm
Forum: Microscopes and optics
Topic: Euromex or Motic?
Replies: 54
Views: 446

Re: Euromex or Motic?

. ... So even including taxes and shipping (well I do not know the shipping rate to the UK) ... . May I just note for reference: Importing into the UK can be quite a costly business The system is clearly described here: https://www.gov.uk/goods-sent-from-abroad/tax-and-duty N.B. __ the Devil is in ...
by MichaelG.
Wed Jul 08, 2020 9:12 am
Forum: Illumination Techniques
Topic: Best illumination strategy for non transparent spherules?
Replies: 5
Views: 109

Re: Best illumination strategy for non transparent spherules?

I Forgot to mention the size of the spherules. Most of them are between 200 and 400 micrometer. Should be pretty easy at that scale ... on-axis or off-axis incident illumination according to the nature of the surface-detail that you wish to observe. You may find this of interest: http://www.microbe...
by MichaelG.
Tue Jul 07, 2020 8:41 am
Forum: Camera systems and imaging
Topic: Anyone have an older copy of Spot Basic before 5.6.3?
Replies: 5
Views: 91

Re: Anyone have an older copy of Spot Basic before 5.6.3?

Sorry, Joe ... My mis-understanding

[didn’t recognise the cable]

... Regret I must leave you to it.

MichaelG.
by MichaelG.
Mon Jul 06, 2020 4:15 pm
Forum: Home-made microscope adaptations
Topic: 3D printing - AMScope / Canon adaptor, for Barlow telescope lens. (And many others)
Replies: 5
Views: 1206

Re: 3D printing - AMScope / Canon adaptor, for Barlow telescope lens. (And many others)

Great stuff, Sarah

It’s wonderful to see people that do not have a full workshop designing good things and 3D printing them.

My ... how things have changed in the last few years !!

MichaelG.
by MichaelG.
Mon Jul 06, 2020 8:41 am
Forum: Camera systems and imaging
Topic: Anyone have an older copy of Spot Basic before 5.6.3?
Replies: 5
Views: 91

Re: Anyone have an older copy of Spot Basic before 5.6.3?

You have probably looked here already :
https://webstore.diaginc.com/category-s/30.htm

But it might be the best place to ask for ‘informed’ answers

MichaelG,
by MichaelG.
Mon Jul 06, 2020 7:45 am
Forum: Camera systems and imaging
Topic: Need help with Spot 35.5 Gigabit Insight camera
Replies: 3
Views: 71

Re: Need help with Spot 35.5 Gigabit Insight camera

Please see my post on your concurrent thread :

viewtopic.php?f=9&t=9812#p83539

Are there any markings on your camera to confirm that it is part of the ‘Gigabit’ range ?
... That term is usually used for Ethernet connected equipment.

MichaelG.
by MichaelG.
Sun Jul 05, 2020 10:43 pm
Forum: Camera systems and imaging
Topic: Anyone have an older copy of Spot Basic before 5.6.3?
Replies: 5
Views: 91

Re: Anyone have an older copy of Spot Basic before 5.6.3?

Sorry ... I’ve not even seen that camera before But at least I now know that it’s Ethernet connection, and a decent spec. http://www.spotimaging.com/downloads/public/userguides/spot-insight-gigabit-hardware-guide.pdf I wish you success. MichaelG. . Oops ! ... I was evidently mistaken :oops: I’ve jus...
by MichaelG.
Sun Jul 05, 2020 5:22 am
Forum: Illumination Techniques
Topic: Incident illumination
Replies: 37
Views: 1115

Re: Incident illumination

Yes ... stripping with caustic soda is probably preferable to removal by abrasion [but the resulting surface was good enough for what I was doing at the time] The nominal ‘3/4 ball’ is, I believe, technically known as an ‘aplanatic ball lens’ and is usefully described here: http://doriclenses.com/op...
by MichaelG.
Sat Jul 04, 2020 10:07 pm
Forum: Illumination Techniques
Topic: Incident illumination
Replies: 37
Views: 1115

Re: Incident illumination

They are 3/4 balls, with the flat surface mirrored [aluminised] and [used ‘sideways’] Might it be undone with sodium hydroxide perhaps ? Then you would have a planosuperconvex lens ? ! It can be removed by careful abrasion with a very fine diamond hone [ Eze-Lap] The resulting lens is interesting; ...
by MichaelG.
Sat Jul 04, 2020 8:33 am
Forum: Pictures and Videos
Topic: Actinocyclus
Replies: 9
Views: 376

Re: Actinocyclus

I found it interesting to be able to see it from this angle Very informative, and it bears comparison with these SEM images: https://www.researchgate.net/figure/SEM-photographs-of-Actinocyclus-species-from-early-to-middle-Miocene-lacustrine-sediments_fig3_325597448 We tend to lose sight of the thre...
by MichaelG.
Fri Jul 03, 2020 12:08 pm
Forum: Microscopes and optics
Topic: Samsung TV "ultra black" under microscope
Replies: 12
Views: 305

Re: Samsung TV "ultra black" under microscope

Wow ! ... I never expected to see a Mitutoyo objective described as worse. There is obviously something interesting going-on. I think the clue may be in the Olympus product description: Olympus' LCPLFLN-LCD lenses are optimal for observing specimens through glass substrates such as LCD panels. The a...
by MichaelG.
Thu Jul 02, 2020 7:28 am
Forum: Introduce yourself
Topic: Microphotography newbie
Replies: 24
Views: 779

Re: Microphotography newbie

I’ve just stumbled across this wonderful resource, Debra

https://palaeo-electronica.org/content/about

Serious content, and an effective search facility ... and it’s free to use.

MichaelG.
by MichaelG.
Thu Jul 02, 2020 5:53 am
Forum: Introduce yourself
Topic: Microphotography newbie
Replies: 24
Views: 779

Re: Microphotography newbie

Some thoughts, Paleome: […] PeteM makes some excellent points, Paleome You already have one of the great stereoscopes there, and I would be inclined to find a way of photographing with it [*] rather than looking for a replacement. * perhaps even making stereo pairs MichaelG . P.S. You may have this...
by MichaelG.
Wed Jul 01, 2020 9:58 pm
Forum: Microscopes and optics
Topic: Fixed Köhler
Replies: 45
Views: 945

Re: Fixed Köeler

MichaelG. wrote:
Wed Jul 01, 2020 9:02 pm
... but I can still find no actual description of the illumination optics.
.
Surely one of these companies could have the courtesy to describe what’s in their microscope.

MichaelG.
by MichaelG.
Wed Jul 01, 2020 9:02 pm
Forum: Microscopes and optics
Topic: Fixed Köhler
Replies: 45
Views: 945

Re: Fixed Köeler

Motic seem confused too. In the product description for the Panthera they state "full Kohler", but on the same page in the features list they say "fixed Kohler". I don't see a field diaphragm. . Curiouser and Curiouser : Have a look at p12 of this document [p13 of the PDF] https://genexpress.cl/wp-...
by MichaelG.
Wed Jul 01, 2020 8:43 pm
Forum: Pictures and Videos
Topic: Dinoflagellate
Replies: 8
Views: 411

Re: Dinoflagellate

Strange but True ... I have just found this:
https://www.coralkeyscuba.com/blog/2017 ... al-or-fake

MichaelG.
by MichaelG.
Wed Jul 01, 2020 7:51 pm
Forum: Pictures and Videos
Topic: Dinoflagellate
Replies: 8
Views: 411

Re: Dinoflagellate

Shame it got away ... it looks a beauty

Strangely alien shape :?

MichaelG.
by MichaelG.
Wed Jul 01, 2020 5:03 pm
Forum: Microscopes and optics
Topic: Fixed Köhler
Replies: 45
Views: 945

Re: Fixed Köeler

75RR wrote:
Wed Jul 01, 2020 4:07 pm
MichaelG. wrote:
Wed Jul 01, 2020 8:30 am

I'm still not clear what is the difference between "fixed Köhler" and a microscope without Köhler illumination.
Prefocused on the condenser front focal plane perhaps ...
Forgive me mentioning it, but ... david_b wrote that, not me

MichaelG.