Search found 5861 matches

by Charles Krebs
Mon Jun 01, 2020 8:06 pm
Forum: Administrator's Appreciation Gallery...Photography Through the Microscope
Topic: Callus remover abstract
Replies: 11
Views: 2050

That is gorgeous!
by Charles Krebs
Sat May 23, 2020 3:07 pm
Forum: Photography Through the Microscope
Topic: Marine vorticella, foraminifer, diatoms , and ?
Replies: 10
Views: 1200

Marine vorticella, foraminifer, diatoms , and ?

Briefly stopped by a saltwater beach about a week ago. It was low tide so I collected a bit of algae at the waters edge. It was quite a treasure trove. Normally I use my plankton net for salt water collecting so my subject matter is whatever plankton is caught. This time I saw quite a few new creatu...
by Charles Krebs
Sat May 23, 2020 2:23 pm
Forum: Photography Through the Microscope
Topic: Rough Diamonds
Replies: 20
Views: 1620

Nicely photographed! Fascinating subject.
by Charles Krebs
Sat May 23, 2020 2:20 pm
Forum: Photography Through the Microscope
Topic: Stomata
Replies: 3
Views: 700

Nice images. Lovely patterns.
by Charles Krebs
Sat May 23, 2020 1:08 pm
Forum: Photography Through the Microscope
Topic: Pollen autofluorescence
Replies: 27
Views: 2866

Pau,
These look fantastic! Really nice work.
by Charles Krebs
Wed May 13, 2020 4:03 pm
Forum: Equipment Discussions
Topic: Latest recommendation for single die LED for microscope
Replies: 9
Views: 1225

Andy, just wondered if anyone had discovered and tested any of the latest ones. Did you have a model in mind. The one's I mentioned were from memory, but we ran a series of tests on quite a few other Cree, (as well as a few Luxeons) relatively recently. I can't access the results until the current "...
by Charles Krebs
Tue May 12, 2020 8:06 pm
Forum: Equipment Discussions
Topic: Latest recommendation for single die LED for microscope
Replies: 9
Views: 1225

If you are looking for a "single die" to replace a tungsten bulb filament, you might need to compromise your spec list. If you could figure out how to use a COB of about 10mm diameter you have some very interesting choices. You asked about single die... Cree XP-G2. (5700k, 90CRI, ~6W) CreeXM-L2 (300...
by Charles Krebs
Sat May 09, 2020 12:39 am
Forum: Photography Through the Microscope
Topic: Arcella (with gas?)
Replies: 11
Views: 1552

Arcella (with gas?)

Well, it does appear so, but not because of a bad meal. Get to that later. First... I found this Arcella racing around a recent wet mount. Now they don't move all that fast but I needed 33 images for the stack and during that time it would move from one side of the field of view to the other. (That ...
by Charles Krebs
Sat May 09, 2020 12:01 am
Forum: Photography Through the Microscope
Topic: Natural diamonds, cross polarized light (black diamond add)
Replies: 21
Views: 2542

Really nice. Fascinating!
by Charles Krebs
Fri May 08, 2020 9:57 pm
Forum: Photography Through the Microscope
Topic: Draparnaldia, Fagilaria, and Volvox
Replies: 17
Views: 3695

Guercini, Here are a bunch where electronic flash was used to stop motion. https://www.photomacrography.net/forum/viewtopic.php?t=11702 https://www.photomacrography.net/forum/viewtopic.php?t=35158 https://www.photomacrography.net/forum/viewtopic.php?t=32234 https://www.photomacrography.net/forum/vie...
by Charles Krebs
Tue May 05, 2020 3:17 am
Forum: Equipment Discussions
Topic: Small tube lens
Replies: 10
Views: 1620

To check for coverage it will be fine. But the "B" coating reflects too high a percentage of light wavelengths up to about 500nm (see chart and spreadsheet here: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=12767 ) I think you will find it does not give good color for imaging or light t...
by Charles Krebs
Tue May 05, 2020 12:39 am
Forum: Equipment Discussions
Topic: Small tube lens
Replies: 10
Views: 1620

Saul,

They show the "A" coating as in stock. Why not get the "A"?

I once ordered a "B" coated Thorlab condenser lens by accident, and it was unsuitable for use in the visible wavelengths.
by Charles Krebs
Mon May 04, 2020 1:46 am
Forum: Photography Through the Microscope
Topic: Cribraria violacea, emerging
Replies: 2
Views: 759

Ken,
You have a knack for finding these. Such an odd life cycle. How long will a subject like this remain in good "photographic condition" if not disturbed?
by Charles Krebs
Mon May 04, 2020 1:38 am
Forum: Photography Through the Microscope
Topic: Asparagus, grape tomato, raspberry and iris seed pod
Replies: 6
Views: 1273

Walter, You cut them without fixation on a vibratome? I suppose the tissue was strong enough to be sectioned? They were fresh subjects and were embedded in agarose which helped a great deal. Seeds were a problem with subjects like the "grape" tomato, because they would often get pushed through the s...
by Charles Krebs
Sun May 03, 2020 4:27 pm
Forum: Photography Through the Microscope
Topic: Midge wings
Replies: 4
Views: 952

Midge wings

Sort of a plain wing, but I like the subdued interference colors that show up in various places, as well as the shape at the inner top. I think this a "thin film interference" (like in a soap bubble) and not the more familiar structural color found in beetles/butterflies caused by micro structures. ...