Search found 153 matches

by JL
Sat Feb 20, 2021 8:00 am
Forum: Photography Through the Microscope
Topic: Chondritic Meteorite section
Replies: 9
Views: 1605

Re: Chondritic Meteorite section

Hi Jose Antonio. I normally prepare photo-mosaics from petrographical thin sections, although not as bigger as you do. In my case, they are usually 54 pictures, taken on my microscope using a Canon 550D. For stitching, I use either Microsoft ICE or Affinity Photo. Microsoft ICE is really fast at com...
by JL
Tue Jan 26, 2021 7:07 am
Forum: Nature Photography -- Macro and Close-up
Topic: Of Armies and Agriculture
Replies: 18
Views: 4725

Re: Of Armies and Agriculture

Excellent!!

Thank you for posting.
by JL
Tue Dec 22, 2020 8:21 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Micro meteorites
Replies: 29
Views: 4464

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: 4851

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: 5283

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: 1755

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: 1588

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: 2086

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: 2429

Nice stereo pair :D
by JL
Wed Jul 03, 2019 6:15 am
Forum: Equipment Discussions
Topic: Panasonic S1R first stack
Replies: 29
Views: 3375

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: 2209

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: 1821

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: 3062

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: 2889

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: 2165

Nice sample Harald, is not easy to find crystalized copper :shock: