Search found 960 matches

by hkv
Wed Sep 02, 2020 8:20 pm
Forum: Pictures and Videos
Topic: Programmed nuclear death in Paramecium
Replies: 17
Views: 1128

Re: Programmed nuclear death in Paramecium

Excellent work and images! Very inspirational.
by hkv
Wed Sep 02, 2020 8:08 pm
Forum: Introduce yourself
Topic: Hello from Sweden, Stockholm
Replies: 3
Views: 265

Re: Hello from Sweden, Stockholm

Welcome Gregers, I am also from Stockholm. Plenty of knowledge on this site to sort out most of the issues you will face in this fascinating hobby. As mentioned, collecting Diatoms in Mälaren is fantastic and I normally drag a net after the boat when going out with my family on boat trip. Always ple...
by hkv
Sun Aug 09, 2020 11:11 am
Forum: Pictures and Videos
Topic: A very beautiful creature (Phacus)
Replies: 13
Views: 1158

Re: A very beautiful creature (Phacus)

One of my favourite species! So elegant in the water. Optimized for gliding through the water!
by hkv
Sun Aug 09, 2020 11:05 am
Forum: Camera systems and imaging
Topic: For fluorescence microscopy, specialized microscope camera or DSLR?
Replies: 8
Views: 5324

Re: For fluorescence microscopy, specialized microscope camera or DSLR?

I totally agree with Robert here. I have also tested many microscope cameras, but I produce better images with DSLRs. One of the biggest issues I have had over the years with dedicated microscope cameras is that they require proprietary software which often is buggy and slow. Commercial software and...
by hkv
Wed Aug 05, 2020 7:45 pm
Forum: Introduce yourself
Topic: Hello from Borgholm, Sweden
Replies: 6
Views: 755

Re: Hello from Borgholm, Sweden

Welcome Enrico! I am from Stockholm. Glad to see a fellow microscopist from Sweden here!
by hkv
Wed Aug 05, 2020 7:27 pm
Forum: Camera systems and imaging
Topic: Suggestion for Olympus CX23 Cam
Replies: 2
Views: 591

Re: Suggestion for Olympus CX23 Cam

I have the Olympus EP50 camera on my CX23. Works very well, but you could also just mount a DSLR camera and get excellent results. If you mount a DSLR, you need a series of tubes and adapters depending on your camera sensor size. If you decided to go for the DSLR route, I can give further advice on ...
by hkv
Wed Jul 29, 2020 9:23 am
Forum: Pictures and Videos
Topic: Melosira nummuloides
Replies: 11
Views: 572

Re: Melosira nummuloides

Very sharp and beautiful!
by hkv
Mon Jul 27, 2020 7:55 am
Forum: Resources (online, books etc.)
Topic: Microscopy FAQ
Replies: 13
Views: 1455

Re: Microscopy FAQ

Very useful and Fantastic work! Well Done!
by hkv
Fri Jul 24, 2020 2:15 pm
Forum: Pictures and Videos
Topic: Water mite
Replies: 8
Views: 1097

Re: Water mite

Great work!
by hkv
Wed Jul 22, 2020 9:12 pm
Forum: Pictures and Videos
Topic: Peacock feather
Replies: 11
Views: 1018

Re: Peacock feather

Hi Håkan, great images, a lot of effort well spent! And thank you for pointing out the crucial points of the method. Everybody knows that peacock feathers are beautiful, but not that they are this beautiful. Bob +1 from me ... and one more from my wife !! MichaelG. Great! I am glad she liked them!
by hkv
Wed Jul 22, 2020 3:48 pm
Forum: Pictures and Videos
Topic: Peacock feather
Replies: 11
Views: 1018

Re: Peacock feather

Thanks all!
DonSchaeffer wrote:
Wed Jul 22, 2020 3:37 pm
Beautiful! Did you use polaroid?
No, I used regular light using 4 external lamps with diffusers. No pol-filters were used.

/Håkan
by hkv
Wed Jul 22, 2020 11:06 am
Forum: Pictures and Videos
Topic: Peacock feather
Replies: 11
Views: 1018

Peacock feather

Posting some details from a Peacock feather I had in a drawer for a couple of years, waiting to be photographed. It turned out to be very difficult to photograph these feathers. Reflections were very difficult to eliminate which made focus stacking impossible as white spots do not have sufficient co...
by hkv
Mon Jul 06, 2020 7:20 pm
Forum: Pictures and Videos
Topic: Parental care with gastrotrichs
Replies: 10
Views: 487

Re: Parental care with gastrotrichs

Wow, amazing video of the amoeba eating the egg. Great work!
by hkv
Tue May 19, 2020 9:31 am
Forum: Resources (online, books etc.)
Topic: The discoverer of diatoms has been identified
Replies: 4
Views: 619

Re: The discoverer of diatoms was identified

This was a very interesting read! Thank you for posting. Amazing how much drama these discoveries caused at the time. I love how he in 1703 described Paramecium with it's "little feet" and and "are perpetually beating about like a Spaniel in a Field". "Those Animalculi marked F. are also plentiful i...
by hkv
Thu Apr 09, 2020 3:46 pm
Forum: Pictures and Videos
Topic: Stigonema Mammilosum
Replies: 8
Views: 790

Re: Stigonema Mammilosum

Thanks all! It is truly an interesting species but difficult to culture. I have them in a petri dish, but they are not growing at the moment. Also have a batch in culture growth media with very limited growth. Trying to make a few more strands to photograph. Will try using an oil objective. These ve...
by hkv
Wed Apr 08, 2020 6:25 pm
Forum: Pictures and Videos
Topic: A new film on a Stentor.
Replies: 4
Views: 355

Re: A new film on a Stentor.

Great effect! Almost DIC-like!
by hkv
Wed Apr 08, 2020 11:34 am
Forum: Pictures and Videos
Topic: Stigonema Mammilosum
Replies: 8
Views: 790

Stigonema Mammilosum

This photograph shows a beautiful (and relatively large) terrestrial cyanobacteria often found growing on rocks. Stigonema Mammilosum is a short branching species that can be found as blackish crusts and biofilms on inselbergs (isolated rock hill, knob or ridge) in many places on earth. Alexander vo...
by hkv
Wed Apr 08, 2020 11:02 am
Forum: Microscopes and optics
Topic: Olympus U-AN360-3
Replies: 2
Views: 382

Re: Olympus U-AN360-3

I can send close-up pictures of all sides of it, but perhaps not the inside. I don't want to take it apart.
by hkv
Tue Apr 07, 2020 2:33 pm
Forum: Pictures and Videos
Topic: Swamps come alive.
Replies: 11
Views: 869

Re: Swamps come alive.

What is the scale of each of the "vases" in Dinobryon. The vase shaped sections in the samples I collected are about 20 microns in length. I observed no internal structures, except what I observed below. In pictures, # 4, #5' where a vase structure contains large inclusions, they appear to be singl...
by hkv
Tue Apr 07, 2020 12:52 pm
Forum: Pictures and Videos
Topic: Swamps come alive.
Replies: 11
Views: 869

Re: Swamps come alive.

Always nice when the ponds starts to come back to life! The vase shaped organism is likely a golden algae called Dinobryon.

Image



Golden Algae - Dinobryon
by Håkan Kvarnström, on Flickr
by hkv
Sun Mar 22, 2020 10:32 pm
Forum: Pictures and Videos
Topic: Trachyneis aspera (another)
Replies: 17
Views: 2342

Re: Trachyneis aspera (another)

Beautiful!
by hkv
Sun Feb 09, 2020 1:49 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 5231

Re: Micrographs in Black & White

Thoughtful and profound microscopy observations with your B/W image captures spark my my reaction, thank you hkv. It has always given me pause at how with 'blasts of transmitted illumination'...a sample wet mount slide prep is oh so unnaturally visualized. I toyed with 'night vision' device to see ...
by hkv
Thu Feb 06, 2020 7:23 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 5231

Re: Micrographs in Black & White

Quite interesting: Botryococcus has a lot of potential as a source for renewable energy as it produces a lot of hydrocarbons: https://de.wikipedia.org/wiki/Botryococcus_braunii You have made this visible in a beautiful way, Håkan! Bob Yes, the algae have been used for biofuel production. I wrote th...
by hkv
Thu Feb 06, 2020 7:20 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 5231

Re: Micrographs in Black & White

hb2sbdb wrote:
Thu Feb 06, 2020 12:05 am
amazing! very arfull images. I could make poster out from any of them and hang in my living room (well, maybe except the nematode one :)
Ha ha, yes teh nematode may scare a few people.
by hkv
Tue Feb 04, 2020 10:03 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 5231

Re: Micrographs in Black & White

MicroBob wrote:
Tue Feb 04, 2020 5:25 pm
Isn't it the Botryococus that has oil drops at it's edges?
Yes, yes, I wrote the wrong name. Sorry!
by hkv
Mon Feb 03, 2020 10:07 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 5231

Re: Micrographs in Black & White

Thanks all! Great to get feedback and I agree about the geometric shapes. MicroBob, I also like those two, but also Gloeotricha with the oil-drops around the edge.
by hkv
Mon Feb 03, 2020 10:03 pm
Forum: My microscope
Topic: Olympus BX60F
Replies: 22
Views: 8727

Re: Olympus BX60F

Yes, unfortunately, DIC is not cheap. For some reason the prices refuse to drop on ebay. Used Olympus (BX) equipment are almost more expensive nowadays than they were 3-4 years ago.

/Håkan
by hkv
Sun Feb 02, 2020 9:25 pm
Forum: My microscope
Topic: Olympus BX60F
Replies: 22
Views: 8727

Re: Olympus BX60F

I currently have phase, fluorescent, and dark-field capability but was wondering if anyone familiar with the BX series can tell me what I will need to take advantage of DIC on my particular setup. You need DIC prisms in the condenser. The condensers that take prisms are U-UCD8 and U-UCDB. DIC can b...
by hkv
Sun Feb 02, 2020 7:18 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 5231

Micrographs in Black & White

Hi folks, I have been experimenting with black and white micrographs for a change. I think it gives a different feeling and interesting contrast. Been trying BF, DF, DIC, POL and FLUO to see the difference. The First image is a colonial cyanobacteria (Gloeotrichia) in brightfield. The second image i...
by hkv
Fri Sep 13, 2019 9:17 am
Forum: Pictures and Videos
Topic: Rotifer and some algae
Replies: 12
Views: 2340

Re: Rotifer and some algae

viktor j nilsson wrote:
Thu Sep 05, 2019 8:14 pm
Hej Håkan,
I've admired your work for quite some time. Good to see you post on here as well! Amazing and inspiring photos as always.

Viktor, in Lund
Thanks Viktor! Good to see a Swedish microscope fellow on here. Not many in Sweden that I am aware of with this hobby.