Search found 967 matches

by hkv
Tue Aug 23, 2016 12:02 am
Forum: Pictures and Videos
Topic: Darkfield
Replies: 5
Views: 1037

Re: Darkfield

Radazz wrote:That is a water bubble with the reflection of the darkfield stop in it.
Ahh, I see.
by hkv
Mon Aug 22, 2016 11:58 pm
Forum: Pictures and Videos
Topic: Darkfield
Replies: 5
Views: 1037

Re: Darkfield

Nice! What is that little circular thing in the upper right corner of the third image? Looks man made...
by hkv
Mon Aug 22, 2016 11:50 pm
Forum: Pictures and Videos
Topic: Vorticella from Baltic Sea - The Movie!
Replies: 8
Views: 1120

Vorticella from Baltic Sea - The Movie!

Here is a beautiful Vorticella I found in the Baltic Sea. Check out the close-up clip at the end.

by hkv
Mon Aug 22, 2016 10:08 pm
Forum: Pictures and Videos
Topic: Help ID please - Mite?
Replies: 2
Views: 585

Help ID please - Mite?

Found this one in a water sample. Really quick. Almost impossible to get a stack. This one is blurry because he moved between frames.

Image
by hkv
Mon Aug 22, 2016 2:29 pm
Forum: Pictures and Videos
Topic: Copépode
Replies: 7
Views: 929

Re: Copépode

Very interesting and nice! He has a rough look and almost a little dirty. Just as he came directly from combat with a testate amoeba.
by hkv
Mon Aug 22, 2016 12:36 pm
Forum: Pictures and Videos
Topic: Vorticella
Replies: 9
Views: 1499

Re: Vorticella

That is excellent. That blue background works very well with it. The retraction takes less than 6ms. Impossible to see without a high speed camera. Now that would be both a fun and an expensive toy! Yes, just checked out nice camera which takes up to 1800 frames/second in HD. https://www.phantomhig...
by hkv
Mon Aug 22, 2016 9:03 am
Forum: Pictures and Videos
Topic: Vorticella
Replies: 9
Views: 1499

Re: Vorticella

Thank you! I read that Vorticellas are the fastest animals on earth. The retraction takes less than 6ms. Impossible to see without a high speed camera.
by hkv
Mon Aug 22, 2016 6:20 am
Forum: Microscopes and optics
Topic: Cleaning internal lenses and optics
Replies: 14
Views: 3526

Re: Cleaning internal lenses and optics

Thanks Rodney. I do not plan to take the objectives apart. Mine are still clean, but trinoc heads and photo eyepieces sometimes needs cleaning. I used distilled water and dish wash and it seems to work ok. Very mild cleaning and no rubbing. I hope the coatings did not get hurt.
by hkv
Sun Aug 21, 2016 11:02 pm
Forum: Pictures and Videos
Topic: Vorticella
Replies: 9
Views: 1499

Vorticella

DIC, 40x objective.

Image
by hkv
Sat Aug 20, 2016 2:41 pm
Forum: Specimens, samples and slides
Topic: Reasonable Expectations for Cleanliness of New Materials
Replies: 45
Views: 9197

Re: Reasonable Expectations for Cleanliness of New Materials

Check ebay, usually you find both slips and glasses in auctions. I bought my brand new on ebay in a bulk box.
by hkv
Sat Aug 20, 2016 10:05 am
Forum: Specimens, samples and slides
Topic: Reasonable Expectations for Cleanliness of New Materials
Replies: 45
Views: 9197

Re: Reasonable Expectations for Cleanliness of New Materials

I use VWR slides and slips. I have found these very clean, or at least I have not noticed any dirt, dust or fog. I never clean them before use. I always through away cover slips and use a new every time. I normally reuse the slides unless they are too sticky and time is short... https://www.dropbox....
by hkv
Fri Aug 19, 2016 3:54 pm
Forum: Pictures and Videos
Topic: Spirogyra
Replies: 8
Views: 911

Re: Spirogyra

These are very good! World class sharpness and beauty!
by hkv
Fri Aug 19, 2016 10:07 am
Forum: Pictures and Videos
Topic: Cristallisation de sucre
Replies: 10
Views: 1227

Re: Cristallisation de sucre

Very nice!
by hkv
Thu Aug 18, 2016 11:53 pm
Forum: Microscopes and optics
Topic: Cleaning internal lenses and optics
Replies: 14
Views: 3526

Re: Cleaning internal lenses and optics

Thanks, yes, I guess you are right. People tear it apart and, woosh there goes alignment and precision. I cleaned some lenses in the trinoc head, and it still looks like it works :roll:
by hkv
Thu Aug 18, 2016 7:39 pm
Forum: Beginner's corner
Topic: Telescope that takes accurate photos?
Replies: 8
Views: 2440

Re: Telescope that takes accurate photos?

No worries! :D

Check out for example AmScope and/or Omax microscopes. Available on Ebay and Amazon. In your price range and decent quality. Many forum members of this forum use them and are very happy with their performance. I am sure more members will chime in here soon and give further advice.
by hkv
Thu Aug 18, 2016 7:10 pm
Forum: Microscopes and optics
Topic: Cleaning internal lenses and optics
Replies: 14
Views: 3526

Cleaning internal lenses and optics

Hi, I read in the Olympus manual and also in the Zeiss cleaning manual that you should *never* clean internal optics yourself, but let an authorized service center do the cleaning. Does any one here have any experience or knowledge from this and what would be the reason? Is it so that the coating is...
by hkv
Thu Aug 18, 2016 5:34 pm
Forum: Beginner's corner
Topic: Telescope that takes accurate photos?
Replies: 8
Views: 2440

Re: Telescope that takes accurate photos?

Do you really mean "telescope" as in looking at things far away or do you mean "microscope" as in looking at tiny things?
by hkv
Thu Aug 18, 2016 4:12 pm
Forum: Pictures and Videos
Topic: One diatom, five images [137 kBytes]
Replies: 11
Views: 2702

Re: One diatom, five images

Very good comparison!
by hkv
Thu Aug 18, 2016 4:09 pm
Forum: Miscellaneous
Topic: Zeiss lens wipes
Replies: 4
Views: 2065

Re: Zeiss lens wipes

I use them as well. I think they are good
by hkv
Wed Aug 17, 2016 3:01 pm
Forum: Pictures and Videos
Topic: Nematode
Replies: 7
Views: 1175

Re: Nematode

They are creepy animals... I read somewhere that 80% of all animals on earth are Nematods. Up to 1 million in a cubic meeter of moist soil...
by hkv
Wed Aug 17, 2016 2:59 pm
Forum: Pictures and Videos
Topic: Rotifer 'n Company
Replies: 8
Views: 1061

Re: Rotifer 'n Company

Nice video! I agree with Gekko. My UplanFl 4x-100x are all Phase Objectives. They produce excellent images in all illumination techniques, BF, DF, DIC, and of course, phase. I have heard that the small translucent phase ring may create a slight blur in some areas, but I have never noticed any such t...
by hkv
Tue Aug 16, 2016 6:56 pm
Forum: Resources (online, books etc.)
Topic: Another website to ID all those unknown Protists
Replies: 2
Views: 1523

Re: Another website to ID all those unknown Protists

Thank you for this link! Very good information!
by hkv
Tue Aug 16, 2016 5:43 pm
Forum: Pictures and Videos
Topic: Movie - From Cosmos to Microcosmos
Replies: 8
Views: 1370

Re: Movie - From Cosmos to Microcosmos

Thanks everyone! Yes, hope they hook, but you never know. I bought a reichert neopan in excellent condition for them to play with. Got a good deal, $30. (!)
by hkv
Mon Aug 15, 2016 5:55 pm
Forum: Pictures and Videos
Topic: Movie - From Cosmos to Microcosmos
Replies: 8
Views: 1370

Re: Movie - From Cosmos to Microcosmos

Thanks! We hade great fun!
by hkv
Mon Aug 15, 2016 2:56 pm
Forum: Pictures and Videos
Topic: Purple Loosestrife
Replies: 12
Views: 1420

Re: Purple Loosestrife

Very nice work! Almost like a 3D effect!
by hkv
Sun Aug 14, 2016 11:05 pm
Forum: Pictures and Videos
Topic: Diatom test with Swift FM-31 40x objective
Replies: 18
Views: 2552

Re: Diatom test with Swift FM-31 40x objective

I found this article. Talks about the use of the FM-31. I agree with you 75RR. I like the FM-31 more and more. It has potential, even though I have not managed to get all the parts for it yet.

http://www.microscopy-uk.org.uk/mag/ind ... field.html
by hkv
Sun Aug 14, 2016 9:31 pm
Forum: Pictures and Videos
Topic: Diatom test with Swift FM-31 40x objective
Replies: 18
Views: 2552

Re: Diatom test with Swift FM-31 40x objective

I also think DIY darkfield stop may work well with the FM-31. LED head lamps like this one: https://www.amazon.com/gp/product/B00SWQXY1G/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 may provide more light than mini mag lite, while weighting less (if you take it apart - I use one for my portable scope...
by hkv
Sun Aug 14, 2016 8:15 pm
Forum: Pictures and Videos
Topic: Diatom test with Swift FM-31 40x objective
Replies: 18
Views: 2552

Re: Diatom test with Swift FM-31 40x objective

Amazing what a difference an objective makes! What is the power/NA of the fluorite objective? Yes, agree. The 40X fluorite has NA 0.75. Remember thought that it is not only the objective that differs. The light source, condenser is designed for high aperture. Also in that image the camera is mounte...
by hkv
Sun Aug 14, 2016 8:06 pm
Forum: Pictures and Videos
Topic: Diatom test with Swift FM-31 40x objective
Replies: 18
Views: 2552

Re: Diatom test with Swift FM-31 40x objective

On the other hand, in most cases, a field microscope is used to quickly browse through the samples to see if you have anything of interest. I would say that the ability to achieve contrast would be more important to be able to see transparent objects. That is why I think the Phase-Contrast objective...
by hkv
Sun Aug 14, 2016 4:51 pm
Forum: Pictures and Videos
Topic: Diatom test with Swift FM-31 40x objective
Replies: 18
Views: 2552

Re: Diatom test with Swift FM-31 40x objective

OK, here we go again. I tried oblique but had a hard time increasing resolution. I used the Klaus Kemp "test plate" and the big diatom with very fine mesh inside did not resolve. I included an image from the BX51 as a comparison which (barely) managed to resolve the criss-cross pattern. I think the ...