Search found 5867 matches

by Charles Krebs
Tue Feb 16, 2021 9:30 pm
Forum: Macro & Microscopy Articles
Topic: Smithsonian Magazine on Snowflake Photography
Replies: 9
Views: 3844

Re: Smithsonian Magazine on Snowflake Photography

Mike, There's a brochure here: https://www.ccs-grp.com/ecsuites/media/download/pamphlet/FL_PF_e.pdf And you can check prices at a distributor for their products here: https://pyramidimaging.com The control unit is about $2.1K and the high power light units vary a great deal depending on size and typ...
by Charles Krebs
Sat Feb 13, 2021 3:29 pm
Forum: Macro & Microscopy Articles
Topic: Smithsonian Magazine on Snowflake Photography
Replies: 9
Views: 3844

Re: Smithsonian Magazine on Snowflake Photography

physicsmajor, It does make use of Mitutoyo objectives. Typically 5X, 10X (used most often), and 20X. The camera back is a medium format Phase One IQ3 100Mp Digital Back. There is a cooled stage that utilizes 4 Peltier coolers. The heat is removed with a cooling system utilizing computer liquid cooli...
by Charles Krebs
Mon Feb 01, 2021 2:28 pm
Forum: Macro & Microscopy Articles
Topic: Smithsonian Magazine on Snowflake Photography
Replies: 9
Views: 3844

Re: Smithsonian Magazine on Snowflake Photography

If you would like technical details let me know what you are curious about. I worked with Nathan and a small "crew" building this microscope, and photographing in Fairbanks and Yellowknife.
by Charles Krebs
Mon Feb 01, 2021 1:06 am
Forum: Photography Through the Microscope
Topic: Abalone shell
Replies: 5
Views: 1443

Abalone shell

Very little luck collecting small critters this time of year, so I dusted off my abalone shell and had another look at it. https://www.krebsmicro.com/forumpix/0779_small_aba.jpg https://www.krebsmicro.com/forumpix/0602_small.jpg https://www.krebsmicro.com/forumpix/0646_small_aba.jpg https://www.kreb...
by Charles Krebs
Sun Jan 31, 2021 8:13 pm
Forum: Photography Through the Microscope
Topic: Inside a rosehip
Replies: 6
Views: 1730

Inside a rosehip

I've long wanted a 2X for my MM-11 setup since 4X/5X was often too tight for a good "overall". Came across a good price on a USMC 2X, so I bought it. One of my first subjects was this rosehip. This was the first time I ever opened one and had a peek inside. Interesting. USMC 2X https://www.krebsmicr...
by Charles Krebs
Sat Jan 02, 2021 12:22 am
Forum: Photography Through the Microscope
Topic: Bladderwort (Utricularia sp.)
Replies: 9
Views: 2407

Bladderwort (Utricularia sp.)

Fascinating aquatic carnivorous plant. (With a somewhat unfortunate name.... try telling the wife and kids "Hey, come look at this really cool bladderwort"! For some reason doesn't sound as intriqueing as a "venus fly trap" or a "sundew"). https://www.krebsmicro.com/forumpix/7728_bladderwort.jpg htt...
by Charles Krebs
Sun Jul 19, 2020 11:21 pm
Forum: Photography Through the Microscope
Topic: plant leaf stem cross sections
Replies: 12
Views: 4310

Re: plant leaf stem cross sections

Hi Charles,.. I've always wondered, does a Vibratome tend to cut with less need for support of the material? I would assume so, especially if the settings were just right. Can one alter the frequency and stroke of the commercial machine? It wouldn't be too difficult to make something with both bein...
by Charles Krebs
Tue Jul 07, 2020 11:48 pm
Forum: Photography Through the Microscope
Topic: Lysichiton americanum (Western Skunk Cabbage) sections
Replies: 3
Views: 1876

Lysichiton americanum (Western Skunk Cabbage) sections

These sections are from the central "stalk" of a skunk cabbage plant. Overall the stalk is very "spongy". This is clearly seen in the top two cross section images. You can also see the xylem and phloem tissue interspersed in the first image. The second image is a closer look at this. The third image...
by Charles Krebs
Mon Jun 29, 2020 12:18 am
Forum: Photography Through the Microscope
Topic: plant leaf stem cross sections
Replies: 12
Views: 4310

Re: plant leaf stem cross sections

Is it acquired skill or special equipment that results in such perfect sections? (Probably both...) Thanks for the comments. I'm just starting to play around with this subject for myself. I have used a Vibratome at a lab where I work, but at home here all I have is one of those small, inexpensive h...
by Charles Krebs
Mon Jun 22, 2020 10:03 pm
Forum: Photography Through the Microscope
Topic: plant leaf stem cross sections
Replies: 12
Views: 4310

Re: plant leaf stem cross sections

sebba28 wrote:
Mon Jun 22, 2020 8:48 pm
Beautiful.What stains did you use?
Thanks.

The stains were toluidine, safranin, and a little combo with Janus green on the 3rd one.
by Charles Krebs
Sun Jun 21, 2020 6:17 pm
Forum: Equipment Discussions
Topic: Nikon Diaphot TMD w/ DIC -- Help!
Replies: 25
Views: 8266

Re: Nikon Diaphot TMD w/ DIC -- Help!

Late to the party here but a few items... I seriously doubt that Nikon just ignored the increase in distance, My TMD came set up for DIC and fluorescence (I don't use it) so I have that ~20mm increase. I would be curious for those who do not have this to look at their nosepieces. My nosepiece (and I...
by Charles Krebs
Sun Jun 21, 2020 4:01 pm
Forum: Photography Through the Microscope
Topic: plant leaf stem cross sections
Replies: 12
Views: 4310

plant leaf stem cross sections

Sliced up a few more plants into skinny small pieces :wink: First we have the leaf stalk (petiole) of a lilac bush (Syringa vulgaris). I cut these sections just at the start of the leaf base, where the leaf blade is just beginning to "flare" out. This is what you see as sort of "ears" in the top thr...
by Charles Krebs
Fri Jun 12, 2020 2:29 am
Forum: Photography Through the Microscope
Topic: Broccolini cross section,. Iris stem cross section
Replies: 7
Views: 2113

Re: Broccolini cross section,. Iris stem cross section

... All were darkfield illumination... Perfect ! Simple DF only ? No hidden tricks ? Some staining, polarisation etc ? Sorry about that. No intention of hiding anything. These were indeed stained in a very basic manner. (I suppose I thought that would be apparent). The sections were cut with a hand...
by Charles Krebs
Wed Jun 10, 2020 11:44 pm
Forum: Photography Through the Microscope
Topic: Broccolini cross section,. Iris stem cross section
Replies: 7
Views: 2113

Broccolini cross section,. Iris stem cross section

Came across some of Robert Berdan's excellent plant section shots and was inspired to dig out my old hand microtome. I raided the veggie compartment for some broccolini (cross between broccoli and Chinese broccoli), and then picked an Iris from my yard. I managed to get some shots and only cut my fi...
by Charles Krebs
Wed Jun 10, 2020 11:24 pm
Forum: Photography Through the Microscope
Topic: cyclops
Replies: 12
Views: 2637

Wow! Nicely done.