Search found 151 matches

by JL
Tue Dec 22, 2020 8:21 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Micro meteorites
Replies: 29
Views: 964

Re: Micro meteorites

Hi Argu. If I recall correctly, Larsen used a Dino-Lite type of microscope. I guess that he stacked the images, but I do not remember how he proceeded for this. Combing sands with a neodymium magnet will allow you to recover quite an amount of mineral grains. You will have to be very careful to be a...
by JL
Sat May 09, 2020 5:28 am
Forum: Photography Through the Microscope
Topic: Natural diamonds, cross polarized light (black diamond add)
Replies: 21
Views: 3879

Given the color of the background, a 1/4 Lambda plate was used. A Lambda plate would produce a bright magenta background-color.
by JL
Wed Jan 29, 2020 7:15 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: How to create 3D images?
Replies: 15
Views: 4595

Hi.

Just by chance, I came across a program called Meshroom, which is open source and, I believe, free.

I watched a couple of videos on Youtube and this is something I may try in the future. Take a look, it might suit you.

https://www.youtube.com/watch?v=k4NTf0hMjtY
by JL
Mon Dec 09, 2019 11:17 am
Forum: Photography Through the Microscope
Topic: Dirty snow
Replies: 6
Views: 1391

Hi Rik. Interesting sample. As Chris mentioned, some of the grains may correspond to mica minerals, particularly those very thin and having a flake-like shape. There are some greenish grains, which probable are olivine and or pyroxenes. The serrated grains may correspond to "glass shards" derived fr...
by JL
Mon Oct 07, 2019 7:02 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Veszelyite
Replies: 5
Views: 1427

I concur with the previous opinion, very good detail in the crystals clusters.

Cheers.
by JL
Tue Aug 13, 2019 5:48 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Twinned Cerussite
Replies: 8
Views: 1915

Nice crystals!!.

Have you tried UV light on that sample?
by JL
Tue Jul 23, 2019 6:13 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Mixite
Replies: 9
Views: 2259

Nice stereo pair :D
by JL
Wed Jul 03, 2019 6:15 am
Forum: Equipment Discussions
Topic: Panasonic S1R first stack
Replies: 29
Views: 2885

Hi Chris.

Look for the term "Pixel Refresh", this is how it appears in the G9 manual, probably this the Panasonic lingo for pixel mapping.
by JL
Tue Jul 02, 2019 6:06 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Brochantite
Replies: 9
Views: 2019

Beautiful sample and incredibly crisp photo :shock:
by JL
Tue May 14, 2019 6:01 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Wavellite
Replies: 3
Views: 1676

WOW !!
I can not imagine the amount of work that you put to clean this picture. These minerals in needle-like clusters are a nightmare of overlapped halos and blurs.
Usually, I give up and discard the pictures of such specimens.

Congratulations.
by JL
Tue Apr 23, 2019 6:42 am
Forum: Equipment Discussions
Topic: Fisheye macro using P&S adapters?
Replies: 5
Views: 2937

Have you checked the Laowa 15mm F4 (https://www.venuslens.net/product/laowa-15mm-f/). It is for interchangeable lens cameras, but it could be something of your interest.
by JL
Mon Apr 22, 2019 6:32 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Crocoite
Replies: 10
Views: 2660

It might been not finished yet, but going pretty nicely.

Great picture. :D
by JL
Wed Feb 27, 2019 7:19 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Copper (Cu)
Replies: 2
Views: 2063

Nice sample Harald, is not easy to find crystalized copper :shock:
by JL
Thu Jan 17, 2019 7:25 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: 100:1
Replies: 17
Views: 5875

Very impressive !!!! :shock:
by JL
Mon Dec 03, 2018 7:59 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: gold, again
Replies: 2
Views: 2628

Nice pictures. Certainly, the effort dedicated to the gold specimen was well spent, tiny but really good!!!