Search found 84 matches

by Geopressure
Wed May 20, 2020 3:40 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Goethite in Quartz
Replies: 8
Views: 1440

Physicsmajor: As to the lighting..I was fortunate in that the crystals are somewhat parallel. This allowed me to use a diffused, but still rather directional LED light source oriented to minimize any specular reflections. This did create some shadows but it worked out OK. Nice uniform lighting tende...
by Geopressure
Tue May 19, 2020 6:38 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Goethite in Quartz
Replies: 8
Views: 1440

Glad you liked it, PhysicsMajor. This is actually from a small agate nodule. When I sawed it open it happened to have a hollow center with the Goethite as a bonus. You are correct that this was shot using a 5X microscope objective with a tube lens mounted on a DSLR. It's always good to meet another ...
by Geopressure
Tue May 19, 2020 1:53 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Goethite in Quartz
Replies: 8
Views: 1440

Goethite in Quartz

It's been a while since my last post..here is a spray of Goethite (tentative ID) with Quartz. They grew inside an agate geode from Argentina. Nothing like trying to illuminate something in a cavity. Under the scope these Goethite crystals tend to either look like silver mirrors or black, so this ima...
by Geopressure
Thu Feb 13, 2020 2:52 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Petroleum Quartz
Replies: 4
Views: 1312

A pretty shot, and interesting..where is the specimen from?
by Geopressure
Wed Oct 09, 2019 9:14 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Veszelyite
Replies: 5
Views: 1338

Thanks to all for the nice comments.

For lighting I used flexible LED lamps with two nested plastic diffusers..this one was easy because the subject is not highly reflective.
by Geopressure
Sun Oct 06, 2019 2:27 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Veszelyite
Replies: 5
Views: 1338

Veszelyite

(Cu,Zn)2Zn(PO4)2 ยท 2H2O

From Laochang Mine, Yunnan, China

Stacked at 5X, FOV 4.1mm

The image might have had more impact at 10X, but I liked the distribution of crystals in different orientations...


Image
by Geopressure
Wed Aug 14, 2019 2:28 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Twinned Cerussite
Replies: 8
Views: 1826

Thanks to all for the positive comments. I do love this material. As to over-sharpening, I didn't do anything unusual...not to say it's impossible.

I did not check it under UV but I will :)
by Geopressure
Sun Aug 11, 2019 10:01 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Twinned Cerussite
Replies: 8
Views: 1826

Twinned Cerussite

From Tiger, Arizona

Matrix unknown

Shot at 5X
FOV 4.3mm
Healing brush used to reduce halos...



Image
by Geopressure
Sun Aug 11, 2019 8:22 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: 20x Stacks: Butterfly and Moth Wing Scales
Replies: 10
Views: 1812

20X is challenging for me as well, but these are gorgeous!
by Geopressure
Tue Aug 06, 2019 12:48 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Wulfenite
Replies: 6
Views: 1548

Thanks for all for the comments. Actually I have been thinking that the reflections on the left side may be a little too strong..I guess it's a matter of personal taste.
by Geopressure
Sun Aug 04, 2019 10:50 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Wulfenite
Replies: 6
Views: 1548

Wulfenite

Wulfenite from Kuruktag Mtns., Northern China

Shot at 5X, FOV 4.4mm

Some interesting inclusions and surface features...


Image
by Geopressure
Sat Jul 27, 2019 8:08 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Mixite
Replies: 9
Views: 2136

A dandy shot of a rare mineral...do you know where it's from?
by Geopressure
Wed Jul 17, 2019 5:50 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Synchisite
Replies: 3
Views: 1263

A nice image of an unusual mineral..how large is the field of view ?
by Geopressure
Mon Jul 01, 2019 7:43 pm
Forum: Equipment Discussions
Topic: Magnifying function in LiveView on new Canon Cameras
Replies: 3
Views: 803

I have a Canon T7i and pull up Live View on the PC by using the EOS Utility software and selecting Remote Shooting...it works great and does have a 5X or 10X zoom.

Hope that helps.
by Geopressure
Mon Jul 01, 2019 7:21 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Brochantite
Replies: 9
Views: 1913

It could be calcite..but currently I'm leaning toward Hemimorphite, as someone suggested on a different post.