Search found 71 matches

by ldflan
Wed Dec 14, 2022 6:55 pm
Forum: General Discussion Forum and Community Announcements
Topic: "The US government is giving out free wasps"
Replies: 6
Views: 3711

Re: "The US government is giving out free wasps"

Oh, good! I'm gonna get me some guv'ment wasps. I just hate the stink bugs.
by ldflan
Mon Nov 07, 2022 6:30 pm
Forum: Equipment Exchange
Topic: WTB Olympus Dissecting/Stereo Microscope
Replies: 4
Views: 1284

Re: WTB Olympus Dissecting/Stereo Microscope

FWIW, I've had an AmScope 15x zoom on a (large) boom since 2017 or so. $500 or thereabouts new. I love it, actually. Really a very competent machine. It's not Leitz optics or anything, but for me it's a tool for working on stuff, not for imaging or admiring stuff. It sits on a dedicated table with a...
by ldflan
Tue Oct 25, 2022 8:45 am
Forum: Equipment Discussions
Topic: BH2 UNP Diameter
Replies: 0
Views: 505

BH2 UNP Diameter

If you happen to have a BH2 DIC system and have a spare moment, could someone let me know the exact diameter (and width if it's readily measurable) of the BH2 UNP DIC prism inserts? Thanks!
by ldflan
Thu Oct 13, 2022 11:00 am
Forum: Equipment Exchange
Topic: WTB Olympus Vanox AH Circular Stage
Replies: 0
Views: 925

WTB Olympus Vanox AH Circular Stage

Thanks! Leonard
by ldflan
Wed Aug 31, 2022 3:07 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Black soldier fly in Richland WA
Replies: 8
Views: 1839

Re: update: my yard has BSF's again this year

Rik - Thanks a lot for posting to this, I hadn't seen it before and it's fascinating. I got to the end and was wondering if there have been any studies as to what insects the BSF may be pushing out as its range spreads? And it really is surprisingly wasp-like in appearance - which seems like the kin...
by ldflan
Mon Nov 22, 2021 4:01 pm
Forum: Photography Through the Microscope
Topic: Rosa blanda Rhizome with Starch
Replies: 0
Views: 604

Rosa blanda Rhizome with Starch

A single Nomarski prism acts (I think) as about a 1/16 wavelength retarder plate. Using just one Nomarski prism and rotating your polarizers to suit can be useful for giving a slight birefringence effect without too-radically altering the apparent colors of your sample. Here for example is a picture...
by ldflan
Wed Nov 03, 2021 4:06 pm
Forum: General Discussion Forum and Community Announcements
Topic: Spiders (especially jumping spiders) are much smarter than you think
Replies: 2
Views: 1391

Re: Spiders (especially jumping spiders) are much smarter than you think

"Are they mainly automatons playing out a fixed action plan of behaviors? Or are they also thinking about what they are doing?" I don't know, but I strongly suspect the answer is in some ways "both." A British naturalist and fellow of the Linnean society named Benjamin T. Lowne performed a very inte...
by ldflan
Fri Oct 15, 2021 3:09 pm
Forum: Equipment Discussions
Topic: Nikon Diaphot TMD repair manual
Replies: 2
Views: 518

Re: Nikon Diaphot TMD repair manual

I have a scan of the repair manual for the Diaphot. PM me with your email and will forward it.

Leonard
by ldflan
Fri Oct 15, 2021 2:36 pm
Forum: Equipment Exchange
Topic: WTB Zeiss Pol 10x, 20x, 40x in 160TL
Replies: 0
Views: 524

WTB Zeiss Pol 10x, 20x, 40x in 160TL

Title says it all. Collars must work! Lots of bits and bobs to trade if you like - let me know what you're after.

Leonard
by ldflan
Tue Oct 12, 2021 8:20 pm
Forum: Photography Through the Microscope
Topic: Birefringence (Fluoresence!) of Anthraquinone Inclusions in Lobster Mushroom
Replies: 4
Views: 919

Re: Birefringence of Anthraquinone Inclusions in Lobster Mushroom

Hi Rik. Yes, you are almost certainly right. Duh. Alizarin excitation is green, emission red. I'll check it tomorrow to be sure.

Leonard
by ldflan
Tue Oct 12, 2021 3:48 pm
Forum: Photography Through the Microscope
Topic: Birefringence (Fluoresence!) of Anthraquinone Inclusions in Lobster Mushroom
Replies: 4
Views: 919

Birefringence (Fluoresence!) of Anthraquinone Inclusions in Lobster Mushroom

Lightly edited in view of Rik's observation below. Images to accompany text posted here: https://www.yogile.com/dch4a5mzfyi/51m/share/?vsc=d5c26cfec According to Robert Weaver’s article on the subject here (http://zeiss-campus.magnet.fsu.edu/referencelibrary/pdfs/Weaver_Amer_Lab_35-55-2003.pdf), ani...
by ldflan
Fri Apr 23, 2021 2:19 pm
Forum: Photography Through the Microscope
Topic: Inside a rosehip
Replies: 10
Views: 3801

Re: Inside a rosehip

Amazing images as always by Charles! I'm pretty sure fine brittle plant hairs like these have silica walls like the stinging hairs on nettles. I haven't heard of gypsum, calcium sulfate, deposits in plant cell walls. I have a scanning electron microscope at work with an energy dispersive spectromet...
by ldflan
Sat Mar 06, 2021 3:02 pm
Forum: Equipment Exchange
Topic: Diaphot TMD Repair Manual
Replies: 1
Views: 1029

Diaphot TMD Repair Manual

Got it off eBay and scanned it. PM me this week with your address if you want a copy.

I go long periods without checking the site, so feel free to pass it on if someone posts here asking for it.

Leonard
by ldflan
Sun Feb 28, 2021 10:43 am
Forum: Photography Through the Microscope
Topic: Inside a rosehip
Replies: 10
Views: 3801

Re: Inside a rosehip

The hairs themselves are quite interesting, and seemingly have either a central channel or (as I think) they are folded around to form a kind of spiked tube, sort of like a blade of grass. The five-sided folicular organ at the base of the hairs and the structure of the hairs where they emerge from t...
by ldflan
Sat Feb 27, 2021 12:39 pm
Forum: Photography Through the Microscope
Topic: Birefringence Terminology
Replies: 11
Views: 1845

Re: Birefringence Terminology

DSC09400 RSZ.jpg R. blanda leaflet, 400x DIC 2020-12-03-13.28.47 ZS DMap (2) 1024.jpg R. blanda leaflet, 100x, Crossed polarizers and full wave retarder. Image stack of 11. And this is interesting: figures 3-4 show developing rosette type druse crystals. The authors don't note it, but at very early...