Search found 6512 matches

by 75RR
Mon Mar 30, 2020 1:59 pm
Forum: Off Topic
Topic: Micscape online Magazine
Replies: 28
Views: 4462

Re: Micscape online Magazine

.
by 75RR
Mon Mar 30, 2020 9:07 am
Forum: Pictures and Videos
Topic: Peritrichida
Replies: 9
Views: 180

Re: Peritrichida

Great images! :)
by 75RR
Sun Mar 29, 2020 7:33 pm
Forum: Pictures and Videos
Topic: Olympus image of the year competition
Replies: 4
Views: 116

Re: Olympus image of the year competition

Photomicrography is an art that depends on the artist not less than on the microscope brand. A good microscope definitely helps, having said that, there is more than one manufacturer of good microscopes. I would say that good technique and practice are the key ingredients. There are many variables ...
by 75RR
Sun Mar 29, 2020 7:18 pm
Forum: Pictures and Videos
Topic: Olympus image of the year competition
Replies: 3
Views: 140

Re: Olympus image of the year competition

Just realized from a comment you made in AntoniScott's post that one of the Olympus image of the year competition photos is yours!

My congratulations
by 75RR
Sun Mar 29, 2020 1:09 pm
Forum: Beginner's corner
Topic: Amscope T720 vs. Swift SW380T
Replies: 12
Views: 199

Re: Amscope T720 vs. Swift SW380T

And, do you feel comfortable buying a used microscope that might require a careful look when you first get it (to be sure nothing is missing or broken) and then cleaning or perhaps lubrication? This could be a much better value for your money; especially if you want a "system" microscope that can b...
by 75RR
Sun Mar 29, 2020 6:36 am
Forum: Pictures and Videos
Topic: Olympus image of the year competition
Replies: 3
Views: 140

Re: Olympus image of the year competition

Belated congratulations to hkv https://www.olympus-lifescience.com/en/ ... kvanstrom/

Very much deserved!
by 75RR
Sat Mar 28, 2020 9:22 pm
Forum: Microscopes and optics
Topic: 40x SPlan woes
Replies: 13
Views: 310

Re: 40x SPlan woes

I have both a micrometer and a caliper but it is true that a caliper can do both jobs at a pinch,

particularly if it is possible to see the difference between two measurements even if it lacks a vernier.
by 75RR
Sat Mar 28, 2020 6:57 pm
Forum: Identification help
Topic: Not an amoeba?
Replies: 9
Views: 1730

Re: Not an amoeba?

It is shaped rather like a lobster trap but I suppose the double door entrance could be defensive.
by 75RR
Sat Mar 28, 2020 5:32 pm
Forum: Beginner's corner
Topic: Anyone with a Swift SW350T ?
Replies: 10
Views: 204

Re: Anyone with a Swift SW350T ?

Darkfield using stops with low power objectives should be possible on all transmitted light microscopes.

http://www.microscopy-uk.org.uk/mag/ind ... trast.html
by 75RR
Sat Mar 28, 2020 5:16 pm
Forum: Pictures and Videos
Topic: Viridiraptor
Replies: 4
Views: 105

Re: Viridiraptor

Agree. Very nice!

sinabro, looking through your youtube videos I ran into a very nice one of a cothurnia

I don't recall seeing that here. If you have posted it and I missed it sorry, if you haven't posted it you should.
by 75RR
Sat Mar 28, 2020 1:21 pm
Forum: Microscopes and optics
Topic: 40x SPlan woes
Replies: 13
Views: 310

Re: 40x SPlan woes

https://www.pollin.at/p/digital-mikrometer-501114?gclid=Cj0KCQjw6_vzBRCIARIsAOs54z7XpYpWJSKSErcLeBkEnm_MBlSl6E7dAU0Rgj3BjzLNQ7_mywsdG2UaAlplEALw_wcB Not necessarily advocating buying from Amazon, but I find the comments left by buyers useful https://www.amazon.de/B%C3%BCgelmessschraube-Messschieber...
by 75RR
Sat Mar 28, 2020 11:57 am
Forum: Pictures and Videos
Topic: Close-ups of a microcosm mix
Replies: 11
Views: 163

Re: Close-ups of a microcosm mix

Nice! Very good Darkfield and Oblique
by 75RR
Sat Mar 28, 2020 6:32 am
Forum: Microscopy accessories
Topic: What is it? Marker?? Oiler??
Replies: 6
Views: 127

Re: What is it? Marker?? Oiler??

I've never seen an RMS thread on a hose fitting. So, still a mystery . . .? Looked up pipe fittings. Apparently there are two standards, British and American. Here is an article on the RMS thread: https://www.sizes.com/library/technology/RMS_thread.htm and one on the British Pipe Standard: BSPP: ht...
by 75RR
Sat Mar 28, 2020 5:47 am
Forum: Illumination Techniques
Topic: Zeiss DIC slider
Replies: 9
Views: 183

Re: Zeiss DIC slider

In the light sheet design, the illuminating and imaging light both focus on the same point, kind of the opposite of Koehler illumination. Looked up Light Sheet Microscopy ... 8-) ... is this work or fun? If I get it working, I'll post many photos! Please do https://www.leica-microsystems.com/scienc...
by 75RR
Sat Mar 28, 2020 5:34 am
Forum: Pictures and Videos
Topic: Trachyneis aspera (another)
Replies: 17
Views: 362

Re: Trachyneis aspera (another)

Many thanks Sabatini, glad you liked it!
by 75RR
Fri Mar 27, 2020 11:08 pm
Forum: Microscopes and optics
Topic: 40x SPlan woes
Replies: 13
Views: 310

Re: 40x SPlan woes

I am using the coverslides with .17 to .13 thickness. Depending on the source, the thickness stated on the cover slip box may vary quite a lot. 40x objectives and above perform better when supplied with the cover slip thickness that is printed on them. If it says 0.17mm - I try to give it 0.17mm I ...
by 75RR
Fri Mar 27, 2020 8:32 pm
Forum: Digital processing
Topic: Bit Depth [recommended reading]
Replies: 1
Views: 160

Re: Bit Depth [recommended reading]

Although this page is ‘about’ display equipment, there is much of relevance to digital micrography.
Agree

Here is a page on the same lines that some might find useful: http://www.lagom.nl/lcd-test/
by 75RR
Fri Mar 27, 2020 7:20 pm
Forum: Illumination Techniques
Topic: Zeiss DIC slider
Replies: 9
Views: 183

Re: Zeiss DIC slider

.
Yours looks like a more modern version of mine.

Anyway measurements are:

Width: 14mm
Height: 3.5mm
Length: 40mm (did not include the screw)
by 75RR
Fri Mar 27, 2020 5:06 pm
Forum: Illumination Techniques
Topic: Zeiss DIC slider
Replies: 9
Views: 183

Re: Zeiss DIC slider

I take it that the dimensions of the following DIC sliders will not do?

3 DIC Sliders.jpg
3 DIC Sliders.jpg (97.11 KiB) Viewed 174 times
by 75RR
Fri Mar 27, 2020 9:06 am
Forum: Pictures and Videos
Topic: Trachyneis aspera (another)
Replies: 17
Views: 362

Re: Trachyneis aspera (another)

Sabatini wrote:
Fri Mar 27, 2020 3:43 am
:shock: :shock: shock:
Hi Sabatini, not sure if you are referring to the Diatom or the fact that (to paraphrase a 'famous' american) I can see Morocco from my window!
by 75RR
Thu Mar 26, 2020 4:11 pm
Forum: Microscopes and optics
Topic: 160mm Objectives on Orthoplan
Replies: 13
Views: 188

Re: 160mm Objectives on Orthoplan

I think you may be right. I have misread the chart. There is no diagram for a 170 microscope with a 160 objective and a 170 eyepiece Those 2mm would not seem to be critical according to Leitzcycler and MicroBob Perhaps the best solution would be to see for yourself with an 'economical' leitz objecti...
by 75RR
Thu Mar 26, 2020 4:01 pm
Forum: Microscopes and optics
Topic: 160mm Objectives on Orthoplan
Replies: 13
Views: 188

Re: 160mm Objectives on Orthoplan

That's a nice chart, but it seems to cover every scenario except the one I'm interested in, e.g. 160mm objectives and 170mm eyepieces on a 170mm microscope You are describing #6 on the chart. When using a 160 objective on your Orthoplan raise the 170 eyepiece 8mm with a spacer. (That will bring the...
by 75RR
Thu Mar 26, 2020 9:00 am
Forum: Microscopes and optics
Topic: 160mm Objectives on Orthoplan
Replies: 13
Views: 188

Re: 160mm Objectives on Orthoplan

So what JB (on the mikroskopie-forum) is saying is that on a Leitz 170 tube microscope there is no need to swop eyepieces when using a 160 tube objective, one can simply lift the 170 tube eyepieces by 8mm using a spacer ... (see example #6 on chart) That should save some pennies. https://www.mikrosk...
by 75RR
Wed Mar 25, 2020 9:29 pm
Forum: Pictures and Videos
Topic: A close-up of a broken diatom?
Replies: 9
Views: 156

Re: A close-up of a broken diatom?

Great catch and very good imaging.

What magnification starts at 15 seconds?
by 75RR
Wed Mar 25, 2020 7:11 pm
Forum: Home-made microscope adaptations
Topic: LED for Nikon Labophot Dual View (Teaching) head
Replies: 2
Views: 72

Re: LED for Nikon Labophot Dual View (Teaching) head

Nice to have and be able to use a lathe.

Am curious as to why you included an acrylic washer between the LED and the aluminum rod, given that in all the designs I have seen the use of an aluminum rod is to dissipate heat.
by 75RR
Wed Mar 25, 2020 3:26 pm
Forum: Pictures and Videos
Topic: Trachyneis aspera (another)
Replies: 17
Views: 362

Re: Trachyneis aspera (another)

Many thanks Wes

I am fortunate that the diatoms in the Alborán Sea are photogenic

Map for those who might not have heard of the Alborán Sea or can't place it.

Hornblower fans might recognize some of the landmarks.
by 75RR
Wed Mar 25, 2020 3:01 pm
Forum: Microscopes and optics
Topic: Zeiss Universal Focusing Block
Replies: 5
Views: 114

Re: Zeiss Universal Focusing Block

75RR, Not to change the subject, but do you have the ASI motor Z-axis controller for the universal? Seems like it should also fit the Standard WL. I like ASI products, especially their light sheet microscopes. The Z-drive would be handy. We have motor drive on all our microscopes at work; it would ...
by 75RR
Wed Mar 25, 2020 6:48 am
Forum: Beginner's corner
Topic: Camera taking bad bright field images
Replies: 22
Views: 404

Re: Camera taking bad bright field images

If you can secure that and there is no vibration then that should work fine, assuming the coverage of the field of view is acceptable. Make sure that the microscope is setup correctly before fixing the camera height. Not sure if you have Köhler, if not then place the Condenser just a couple of mm or...
by 75RR
Wed Mar 25, 2020 6:30 am
Forum: Beginner's corner
Topic: Camera taking bad bright field images
Replies: 22
Views: 404

Re: Camera taking bad bright field images

idk what intermediate image means
You should look through the links I posted above.

Repeating here:

http://www.krebsmicro.com/pdf/trinoc_a3.pdf
http://krebsmicro.com/parfocal/index.html
http://www.krebsmicro.com/

Here is a page from the first one ...
by 75RR
Wed Mar 25, 2020 6:14 am
Forum: Beginner's corner
Topic: Camera taking bad bright field images
Replies: 22
Views: 404

Re: Camera taking bad bright field images

I took off part of the trinocular port and held the camera up over it without the adapter and the images are definitely better. Sounds like you are using the intermediate image, that right? But now there is a problem with blue dots/pixels appearing in both brightfield and darkfield images. Could be...