Search found 211 matches
- Tue Aug 06, 2019 9:04 pm
- Forum: Camera systems and imaging
- Topic: DSLR sensor heat - an issue?
- Replies: 3
- Views: 3281
DSLR sensor heat - an issue?
I'm trying to make a final decision on a DSLR and was wondering if the camera is used for live view onto a monitor, does the sensor heat up? If so, is it wise to consider a camera with a faster processor that uses less energy and therefore produces less heat during an extended viewing? Or is the hea...
- Tue Aug 06, 2019 2:26 pm
- Forum: Identification help
- Topic: Amoeba with baggage
- Replies: 2
- Views: 3989
Amoeba with baggage
Found this giant amoeba yesterday and it has something stuck to its posterior. The glob is more reddish than the image shows and there may have been a diatom stuck to it also. I've a cool video but it's in the wrong file extension. The amoeba moves by creating a clear bubble out in front of it with ...
- Sun Aug 04, 2019 2:58 pm
- Forum: Identification help
- Topic: Ptygura rotifer
- Replies: 3
- Views: 3641
Re: Ptygura rotifer
Hi Heather, It is interesting how much these rotifiers vary in their ways of life. We have probably already killed lots of these species before understanding their role in nature. Bob Agreed. The more I look under the microscope, the more I'm convinced that microorganisms drive the health of the en...
- Sat Aug 03, 2019 1:07 am
- Forum: Identification help
- Topic: Ptygura rotifer
- Replies: 3
- Views: 3641
Ptygura rotifer
This sessile rotifer was super cool to find in the pond. It seems to be a Ptygura pilula who built itself an impressive house of excrement. The lateral antennae are visible and from my observations, when the rotifer retreats to the encasement, the lateral antennae poke out first before the creature ...
- Fri Aug 02, 2019 3:23 pm
- Forum: Resources (online, books etc.)
- Topic: How to study gastrotrichs
- Replies: 8
- Views: 7878
Re: How to study gastrotrichs
Thank you for the detailed info, Gastrotrichman.
- Fri Aug 02, 2019 3:08 pm
- Forum: Pictures and Videos
- Topic: Prorocentrum lima (Dinoflagellata)
- Replies: 6
- Views: 4144
Re: Prorocentrum lima (Dinoflagellata)
That's fantastic! I had to look it up - great capture right down to the thecal pores.
- Thu Aug 01, 2019 4:08 pm
- Forum: Microscopes and optics
- Topic: Wavelength and resolution (image embedding fixed)
- Replies: 43
- Views: 14809
Re: Wavelength and resolution (image embedding fixed)
Here is a link to a 2008 article by David Walker on Optical interference filters: http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artaug08/dw-filter.html Thanks for this link. Clever how the excess field iris light was blocked out to avoid reflections using a c...
- Thu Aug 01, 2019 3:37 pm
- Forum: Resources (online, books etc.)
- Topic: How to study gastrotrichs
- Replies: 8
- Views: 7878
Re: How to study gastrotrichs
Thank you. Very nice drawings with detailed labeling. I've bookmarked this.
Do you slow these guys down for viewing with methyl cellulose too or something else?
Do you slow these guys down for viewing with methyl cellulose too or something else?
- Thu Aug 01, 2019 3:33 pm
- Forum: Pictures and Videos
- Topic: Fruit fly chromosomes
- Replies: 16
- Views: 7070
Re: Fruit fly chromosomes
What?! You did this without a stereomicroscope??? That's impressive. Very nice work. I find myself hoping you get a stereomicroscope so we can see isolated organs and system slides.Wes wrote:Moments like these make me wish I had a stereomicroscope because then I could isolate individual organs and systems.
- Thu Aug 01, 2019 1:30 am
- Forum: Microscopes and optics
- Topic: Wavelength and resolution (image embedding fixed)
- Replies: 43
- Views: 14809
Re: Wavelength and resolution (image embedding fixed)
This is very interesting. Thank you for posting. Intuitively it seems the filter would go between the light source and the objective but could it also be placed between the objective and eye piece? I’m curious about the set up used, having not heard of interference filters before. Would you see simi...
- Tue Jul 30, 2019 2:54 pm
- Forum: Identification help
- Topic: Which rotifer?
- Replies: 2
- Views: 4320
Re: Which rotifer?
Thanks for the ID help! Much appreciated.
- Tue Jul 30, 2019 2:53 pm
- Forum: Illumination Techniques
- Topic: Another phase contrast cheat?
- Replies: 8
- Views: 10905
Re: Another phase contrast cheat?
So far small dots have achieved no noticeable changes and larger dots have given very nice dark field. It's possible the dot needs to be directly on the lens or very close.
- Tue Jul 30, 2019 2:43 pm
- Forum: Beginner's corner
- Topic: minimizing harm
- Replies: 61
- Views: 43998
Re: minimizing harm
Thank you for the information on upgrading scopes, PeteM. I had been wondering the same thing.
- Mon Jul 29, 2019 8:12 pm
- Forum: Specimens, samples and slides
- Topic: First caught plankton creatures
- Replies: 14
- Views: 7864
Re: First caught plankton creatures
Beautiful images and a nice haul too. Life takes so many forms it's a bit mind boggling.
- Mon Jul 29, 2019 8:02 pm
- Forum: Illumination Techniques
- Topic: Another phase contrast cheat?
- Replies: 8
- Views: 10905
Re: Another phase contrast cheat?
Hobbyst46,
For my first attempt I'm going to try placing dots of various sizes on plastic discs, made from salvaged plastic packaging. There would likely be some distortion from the plastic but it could be enough to prove concept without putting dots directly on the objective lens.
For my first attempt I'm going to try placing dots of various sizes on plastic discs, made from salvaged plastic packaging. There would likely be some distortion from the plastic but it could be enough to prove concept without putting dots directly on the objective lens.
- Mon Jul 29, 2019 6:17 pm
- Forum: Identification help
- Topic: Which rotifer?
- Replies: 2
- Views: 4320
Which rotifer?
This rotifer looks a lot like a Lapadella spp. or per Freshwater Biology, Microcodides but only appears to have one long toe (not split), though I could be mistaken. Any ideas? Still using a cell phone but working on getting a better set up for nicer images. Possibly there is not enough detail for i...
- Mon Jul 29, 2019 6:06 pm
- Forum: Specimens, samples and slides
- Topic: Wall-Ivy Tissue Prep For Slide Making
- Replies: 7
- Views: 5848
Re: Wall-Ivy Tissue Prep For Slide Making
Many thanks for the FFA recipe. And yes please, keep us posted on the sectioning progress.mrsonchus wrote: Perhaps I should post the Ivy sections here when they are ready about a week from now for further processing and eventual sectioning as that was the one I started the thread with!
Heather
- Mon Jul 29, 2019 6:01 pm
- Forum: Illumination Techniques
- Topic: Another phase contrast cheat?
- Replies: 8
- Views: 10905
Re: Another phase contrast cheat?
Thank you for the clarification. I'll give this method a try.
- Mon Jul 29, 2019 6:00 pm
- Forum: Beginner's corner
- Topic: minimizing harm
- Replies: 61
- Views: 43998
Re: minimizing harm
So based on this thread, it could possibly help long-term eye health by putting a UV filter over a halogen light source?
- Mon Jul 29, 2019 2:48 pm
- Forum: Beginner's corner
- Topic: minimizing harm
- Replies: 61
- Views: 43998
Re: minimizing harm
Although led lighting is cool, many such sources release high levels of uv light. UV light in high concentration is a microbe sterilant and in fact is used industrially as such. Well this is interesting. I too am on the 'catch and release' program for pond microbes and hadn't considered harm from U...
- Mon Jul 29, 2019 2:37 pm
- Forum: Illumination Techniques
- Topic: Another phase contrast cheat?
- Replies: 8
- Views: 10905
Another phase contrast cheat?
Has anyone tried this method? If so, what does the author mean when he says "Imagine a small opaque (black) disk attached in the middle of the objective lens..." (near top of second page)? Does the dot need to be in the middle of the objective lens or could it be at the top/readily accessible part o...
- Sun Jul 28, 2019 3:04 pm
- Forum: Specimens, samples and slides
- Topic: Wall-Ivy Tissue Prep For Slide Making
- Replies: 7
- Views: 5848
Re: Wall-Ivy Tissue Prep For Slide Making
Thank you for posting this. Very nice slide image. Anyone who's ever tried to make a slide knows how difficult it can be to get good results.
What specific fixative do you recommend for plant tissue?
Heather
What specific fixative do you recommend for plant tissue?
Heather
- Sat Jul 27, 2019 2:49 pm
- Forum: Miscellaneous
- Topic: Cheap portable microscope
- Replies: 10
- Views: 9024
Re: Cheap portable microscope
MichaelG,
It's possible the scope would work better with newer Apple products. My iPhone7 is a bit dated. Also the scope comes with a short cable. Possibly with an adapter, it could be connected to the phone for less lag?
It's possible the scope would work better with newer Apple products. My iPhone7 is a bit dated. Also the scope comes with a short cable. Possibly with an adapter, it could be connected to the phone for less lag?
- Sat Jul 27, 2019 2:40 pm
- Forum: Pictures and Videos
- Topic: Rotifer egg
- Replies: 4
- Views: 2650
Re: Rotifer egg
Looks like you are correct. Not an egg.75RR wrote:A good catch is always worth sharing!
I wonder though (hard to be sure from just one image) if what you have there is a Vorticella reproducing?
- Fri Jul 26, 2019 11:23 pm
- Forum: Pictures and Videos
- Topic: Rotifer egg
- Replies: 4
- Views: 2650
Rotifer egg
Freshwater pond rotifers. Much to my delight, one has a egg attached to it.
Cell phone image taken @ eyepiece with 20x objective, DF. Low end photography but seemed worth sharing.
Cell phone image taken @ eyepiece with 20x objective, DF. Low end photography but seemed worth sharing.
- Fri Jul 26, 2019 3:46 pm
- Forum: Miscellaneous
- Topic: Cheap portable microscope
- Replies: 10
- Views: 9024
Re: Cheap portable microscope
Attached is the best image obtained so far, taken by my friend. Black bee wing. This one was likely taken using the midrange resolution option, which is the default. A few more observations: iPhone7 has too much delay and it was almost impossible to take good pictures. Newer Android - no delay. Take...
- Fri Jul 26, 2019 2:18 pm
- Forum: Pictures and Videos
- Topic: Alga reproduction
- Replies: 7
- Views: 3933
Re: Alga reproduction
Is that a red algae? Your DIC images are amazing.
- Fri Jul 26, 2019 2:13 pm
- Forum: Pictures and Videos
- Topic: Sauerkraut for a mycologist.
- Replies: 13
- Views: 6313
Re: Sauerkraut for a mycologist.
Many thanks, Apochronaut.
- Thu Jul 25, 2019 5:09 pm
- Forum: Pictures and Videos
- Topic: Sauerkraut for a mycologist.
- Replies: 13
- Views: 6313
Re: Sauerkraut for a mycologist.
The person in question who managed to orchestrate that particular lot of rot, pretty much ignored my advice and went out and bought a huge German fermentor, himalayan salt, a mandolin and probably even a pair of lederhosen and a Tyrolean hat for all know. That is so funny. Well, I like their enthus...
- Thu Jul 25, 2019 3:56 pm
- Forum: Pictures and Videos
- Topic: Sauerkraut for a mycologist.
- Replies: 13
- Views: 6313
Re: Sauerkraut for a mycologist.
Making sauerkraut is what recently got me back into using my microscope. And I too have had the experience of sauerkraut gone wrong, namely, a mushy mess. Glad to see my conclusion (yeast overgrowth, and also some coccus bacteria) is in alignment with thoughts in this thread. I like this paper with ...