Search found 7687 matches

by 75RR
Fri Apr 23, 2021 7:02 am
Forum: Pictures and Videos
Topic: Actinocyclus octonarius
Replies: 21
Views: 349

Re: Actinocyclus octonarius

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Thanks ScienceMatters, I am happy with it. It is just that for me, part of the fun is seeing how far I can get.
by 75RR
Fri Apr 23, 2021 6:59 am
Forum: Pictures and Videos
Topic: Actinocyclus octonarius
Replies: 21
Views: 349

Re: Actinocyclus octonarius

I get strong chromatic aberration especially around the edges when I tried direct projection without lifting the eyepiece. Hi Wes, in this case you will have changed the objective's focus, right? This is not a good method as the objectie is not used as intended. Bob What I did was to make sure the ...
by 75RR
Thu Apr 22, 2021 8:18 pm
Forum: Pictures and Videos
Topic: Actinocyclus octonarius
Replies: 21
Views: 349

Re: Actinocyclus octonarius

I compared Rolf's hybrid eyepieces ( eye lens KPL 10x, barrel KPL 8x, field lens either KPL 8x or KPL 10x) to a lifted standard KPL 8x: The hybrids give a much better image. So Rolf really had an ingenious idea here, especially since the hybrids consist of fairly common components. Neither of us ha...
by 75RR
Thu Apr 22, 2021 7:19 pm
Forum: Pictures and Videos
Topic: Actinocyclus octonarius
Replies: 21
Views: 349

Re: Actinocyclus octonarius

. Many thanks chrisimbee and MicroBob For your M43 camera the lenses of a KPL 10x non-high eyepoint mounted on the barrel of the KPL 8x non-high-eyepoint should give good colour correction and good use of the image circle. That was an interesting article: https://microscopyofnature.com/microphotogra...
by 75RR
Thu Apr 22, 2021 9:57 am
Forum: Pictures and Videos
Topic: Actinocyclus subtilis Video
Replies: 6
Views: 124

Re: Actinocyclus subtilis Video

Many thanks ImperatorRex
by 75RR
Wed Apr 21, 2021 5:37 pm
Forum: Pictures and Videos
Topic: Living Diatom(Pinnularia sp)
Replies: 6
Views: 143

Re: Living Diatom(Pinnularia sp)

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That is very good for Brightfield, well done.
by 75RR
Wed Apr 21, 2021 5:36 pm
Forum: Pictures and Videos
Topic: Actinocyclus subtilis Video
Replies: 6
Views: 124

Re: Actinocyclus subtilis Video

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Thanks sinabro
by 75RR
Wed Apr 21, 2021 2:17 pm
Forum: My microscope
Topic: Parfocal shims
Replies: 6
Views: 299

Re: Parfocal shims

Thanks for the tip!
by 75RR
Wed Apr 21, 2021 1:22 pm
Forum: My microscope
Topic: Parfocal shims
Replies: 6
Views: 299

Re: Parfocal shims

Thanks apochronaut, was just trying to keep things like postage and customs simple.

Have dropped the UK as an ebay shopping area - have heard lots of horror stories in terms of postage and tax!

Will contact some EU dealers and see what they have.
by 75RR
Wed Apr 21, 2021 7:57 am
Forum: Pictures and Videos
Topic: is Peranema an amoeba ??
Replies: 10
Views: 180

Re: is Peranema an amoeba ??

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Wonder if what you have there is Hyperamoeba flagellata.

See link: https://www.researchgate.net/publicatio ... _apparatus
by 75RR
Wed Apr 21, 2021 7:28 am
Forum: My microscope
Topic: Parfocal shims
Replies: 6
Views: 299

Re: Parfocal shims

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Anyone know of a European supplier for objective shims?

Link above may charge European buyers in Euros but the company is in Philadelphia USA
by 75RR
Wed Apr 21, 2021 5:47 am
Forum: Resources (online, books etc.)
Topic: Micro algae database and image collection is online!
Replies: 4
Views: 164

Re: Micro algae database and image collection is online!

That is a great resource + beautiful images - thanks for the hard work!
by 75RR
Tue Apr 20, 2021 9:00 pm
Forum: Introduce yourself
Topic: Hello from a newcomer
Replies: 4
Views: 129

Re: Hello from a newcomer

Welcome BobHelmond, when you say new trinocular, new to you or new new?
by 75RR
Tue Apr 20, 2021 8:55 pm
Forum: Pictures and Videos
Topic: Actinocyclus subtilis Video
Replies: 6
Views: 124

Re: Actinocyclus subtilis Video

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Thanks Hobbyst46, not something I have managed to catch on video before as I usually start by pinning them down with the cover slip.
by 75RR
Tue Apr 20, 2021 8:42 pm
Forum: Pictures and Videos
Topic: Actinocyclus subtilis Video
Replies: 6
Views: 124

Actinocyclus subtilis Video

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Quite a lot of water between the diatom and the cover slip at times with consequently a drop in resolution
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by 75RR
Tue Apr 20, 2021 7:44 am
Forum: Identification help
Topic: Is this Amoeba Acella?
Replies: 4
Views: 121

Re: Is this Amoeba Acella?

Sometimes quite a lot of detail is needed for an ID

Are you familiar with Ferry's website Microworld?

https://www.arcella.nl/lobose-testate-amoebae/
by 75RR
Mon Apr 19, 2021 9:28 pm
Forum: Microscopes and optics
Topic: Is Slide thickness critical?
Replies: 5
Views: 101

Re: Is Slide thickness critical?

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Thanks Hobbyst46, looks like I am going to start measuring slide thickness as well now.

Found this in Light Microscopy by Murray and Robinow page 15
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by 75RR
Mon Apr 19, 2021 5:47 pm
Forum: Microscopes and optics
Topic: Is Slide thickness critical?
Replies: 5
Views: 101

Re: Is Slide thickness critical?

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Thanks

Found this in Fundamentals of light microscopy
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by 75RR
Mon Apr 19, 2021 4:53 pm
Forum: Microscopes and optics
Topic: Is Slide thickness critical?
Replies: 5
Views: 101

Is Slide thickness critical?

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It suddenly occurred to me that though I do take into account cover slip thickness I have not done the same with slide thickness.

Both my slide boxes have 1.0/1.2mm written on them. Though I have not measured the slides. Is there an ideal thickness?
by 75RR
Mon Apr 19, 2021 4:03 pm
Forum: Pictures and Videos
Topic: Actinocyclus octonarius
Replies: 21
Views: 349

Re: Actinocyclus octonarius

Thanks Wes An eyepiece is designed to send a virtual image that needs a lens (afocal or an eye) to convert it into a real one. By raising the eyepiece it produces instead a real image that can then be projected directly onto the camera sensor. This is to try to improve sharpness and detail (closer t...
by 75RR
Mon Apr 19, 2021 1:10 pm
Forum: Pictures and Videos
Topic: Actinocyclus octonarius
Replies: 21
Views: 349

Re: Actinocyclus octonarius

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Thanks MichaelG. and Hobbyst46
Is the 12.5X KPL raised above parfocality height ?
Is it a 12.5x -W high eyepoint KPL ?
Raised 10mm by the collar shown. High eyepoint (as indicated by the eyeglass pictogram) but believe field of view is 18mm
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by 75RR
Mon Apr 19, 2021 7:39 am
Forum: Beginner's corner
Topic: should i buy Bresser phase contrast series 57?
Replies: 7
Views: 284

Re: should i buy Bresser phase contrast series 57?

Just to add to the comments above - You may find that though the generic phase kit works well enough you will be limited by the objectives that come with it. A used 160 finite quality microscope will allow you to upgrade just about everything in time (and all designed to work well together) To use Z...
by 75RR
Mon Apr 19, 2021 7:16 am
Forum: Pictures and Videos
Topic: Actinocyclus octonarius
Replies: 21
Views: 349

Re: Actinocyclus octonarius

Thanks janvangastel, was experimenting with direct projection using a 12.5x Kpl
by 75RR
Mon Apr 19, 2021 5:49 am
Forum: Pictures and Videos
Topic: Actinocyclus octonarius
Replies: 21
Views: 349

Re: Actinocyclus octonarius

Many thanks sinabro
by 75RR
Sun Apr 18, 2021 11:52 pm
Forum: Pictures and Videos
Topic: Actinocyclus octonarius
Replies: 21
Views: 349

Actinocyclus octonarius

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Zeiss Planapo 63x/1.4, DIC, 70µm diameter, stacked in Photoshop, Marine sample, Alboran Sea.
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by 75RR
Wed Apr 14, 2021 6:19 am
Forum: Pictures and Videos
Topic: Rotifer Euchlanis
Replies: 5
Views: 199

Re: Rotifer Euchlanis

Very nice! Great resolution and clarity
by 75RR
Tue Apr 13, 2021 3:28 pm
Forum: Pictures and Videos
Topic: Licmophora abbreviata
Replies: 9
Views: 274

Re: Licmophora abbreviata

Many thanks janvangastel and ImperatorRex (had missed your posts)
by 75RR
Sun Apr 11, 2021 12:09 am
Forum: Pictures and Videos
Topic: Rotifer: Adineta vaga minor
Replies: 3
Views: 172

Re: Rotifer: Adineta vaga minor

Great videos with some very nice detail - particularly liked the hatching!
by 75RR
Sat Apr 10, 2021 12:50 pm
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: Zeiss KPL 2.5x Photo Eyepiece
Replies: 17
Views: 642

Re: Wanted: Zeiss KPL 2.5x Photo Eyepiece

Hi, you might have a look at Rolf's new camera adaptation method: https://microscopyofnature.com/microphotography-hybrid-eyepieces He uses combinations of standard eyepiece components to form a projective. I have tested his method and it works very well. Bob The modified eyepiece idea as shown by R...
by 75RR
Fri Apr 09, 2021 6:41 pm
Forum: Pictures and Videos
Topic: Hydra viridissima gets decimated.
Replies: 8
Views: 332

Re: Hydra viridissima gets decimated.

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Excellent action video. Do hope Frank recovers soon!