Search found 224 matches

by dhmiller
Sat Apr 24, 2021 3:35 pm
Forum: Equipment Discussions
Topic: Wemacro Micromate questions
Replies: 19
Views: 554

Re: Wemacro Micromate questions

Thanks very much for both replies, and good to hear that I am not entirely at fault for the inability to align and the various stability issues I believe the device has as shipped. I don't believe either of you is in the US, so I hope I can find someone who can help me improve the stability... I sho...
by dhmiller
Sat Apr 24, 2021 11:27 am
Forum: Equipment Discussions
Topic: Wemacro Micromate questions
Replies: 19
Views: 554

Wemacro Micromate questions

I just got a WeMacro Micromate and am having trouble aligning it to the focuser on my (Motic BA310POL) scope, and I think there are some basic design issues that are at least partially responsible. I'd like to PM with someone who owns one and/or someone who might be able to help build a new mount fo...
by dhmiller
Fri Apr 09, 2021 1:47 pm
Forum: Photography Through the Microscope
Topic: My first crystallisation Caffeine
Replies: 20
Views: 1128

Re: My first crystallisation Caffeine

I think my favorite results currently are from urea, thiourea, beta-alanine and most of those mixed with glycine. That could keep you busy for a long time ;-). Some people melt their compounds on a slide on a hot plate, which I have tried, and others use a tea candle or a Bunsen burner to speed up c...
by dhmiller
Wed Apr 07, 2021 6:28 pm
Forum: Photography Through the Microscope
Topic: My first crystallisation Caffeine
Replies: 20
Views: 1128

Re: My first crystallisation Caffeine

maybe is better I buy them in Europe?

Sorry. I don't know any European sources.
by dhmiller
Tue Apr 06, 2021 3:42 pm
Forum: Photography Through the Microscope
Topic: My first crystallisation Caffeine
Replies: 20
Views: 1128

Re: My first crystallisation Caffeine

Loudwolf has fairy small batches - find on Amazon or direct. Also try Etsy for some things... Dextrin / 4 Ounce Bottle / 100% Pure Food Grade/Fine Powder/USA Sodium Thiosulfate, Fine Crystals, 99.5% min, 500 Grams (1.1 lb.) HiMedia GRM822-100G Hydroquinone, 100 g Humco 272730001 Sodium Silicate Solu...
by dhmiller
Mon Apr 05, 2021 5:17 pm
Forum: Photography Through the Microscope
Topic: My first crystallisation Caffeine
Replies: 20
Views: 1128

Re: My first crystallisation Caffeine

Have a look at the Facebook Crystal Art group. Great images and good resources in the file section, including a large list of birefringement compounds. BHT, Beta Alanine, Urea, Thiourea...
by dhmiller
Mon Apr 05, 2021 5:15 pm
Forum: Photography Through the Microscope
Topic: Acetaminophen
Replies: 1
Views: 350

Re: Acetaminophen

Nice work!
by dhmiller
Mon Apr 05, 2021 5:14 pm
Forum: Photography Through the Microscope
Topic: BHT and Glycine
Replies: 1
Views: 238

BHT and Glycine

BHT and Glycine crystallized. Photographed using a polarizing microscope. ISO 100, 4" exposure, 15x
_DSC6669 BHT GLYCINE4X.jpg

Melted thiourea crystallized. Photographed using a polarizing microscope. ISO 100, 4" exposure, 37x
by dhmiller
Mon Mar 29, 2021 7:31 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: First Light
Replies: 4
Views: 842

Re: First Light

Thanks for your note. Much appreciated.
by dhmiller
Wed Mar 17, 2021 7:54 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: First Light
Replies: 4
Views: 842

Re: First Light

Thanks, Mark. Lots to learn here. The goal is to get it as thin as possible to avoid stacking, but I'm used to stacking from my DSLR/tube lens/scope objective work, so I will definitely give that a try.
by dhmiller
Tue Mar 16, 2021 3:48 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: First Light
Replies: 4
Views: 842

First Light

First light with new Motic microscope. Melted menthol at 40x (10x objective, 4x photo adapter). Single shot. Looks like it needs sharpening and possibly a stack would help. Suggestions welcome.
melted menthol s750-5.jpg
by dhmiller
Fri Feb 19, 2021 5:10 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Photographing chemicals/crystals
Replies: 2
Views: 978

Re: Photographing chemicals/crystals

Will do. Thanks for the reference.
by dhmiller
Wed Feb 17, 2021 9:16 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Color illusions
Replies: 7
Views: 1492

Re: Color illusions

You might enjoy this book:
Vision and Art: The Biology of Seeing Paperback – April 1, 2008
by Margaret S. Livingstone (Author)

Explains some of the biology of illusions as well as how illusions work in various master artworks. One of my favorite references.
by dhmiller
Mon Feb 15, 2021 5:46 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Photographing chemicals/crystals
Replies: 2
Views: 978

Photographing chemicals/crystals

I'm interested in some of the macro techniques used here: https://www.envisioningchemistry.com/chemistry-as-art In particular, does anyone have good references for setting up a polarizing light rig? And any links or pointers about what individual chemicals or compounds or what chemicals produce inte...
by dhmiller
Fri Jan 08, 2021 11:34 am
Forum: Equipment Exchange
Topic: Mitutoyo 100x M Plan Apo
Replies: 0
Views: 2646

Mitutoyo 100x M Plan Apo

For sale: Mitutoyo 100x M Plan Apo $2,000, including PayPal fees and shipping to CONUSA. List price is around $3,200. Willing to consider serious offers. This objective was tested by forum member Chris Slaybaugh and described as: "... a good specimen, indeed" and "I consider it excellent—one of the ...