
Search found 16 matches
- Thu Dec 17, 2020 11:14 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Inclusion in quartz grain
- Replies: 2
- Views: 563
Re: Inclusion in quartz grain
Oh, I like those - lovely inclusions. My long-ago mineralogy agrees that rutile is a likely suspect 

- Tue Nov 24, 2020 1:20 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Volcanic Glass
- Replies: 8
- Views: 1551
Re: Volcanic Glass
Thanks, Leonard. My camera doesn't have the ability to stack frames internally, it's just an entry-level model. I have been shooting manual focus in the sequence you described, starting at the nearest and working toward the furthest. I'm using the manual focus rack to adjust each frame's focus thru ...
- Mon Nov 23, 2020 4:09 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Volcanic Glass
- Replies: 8
- Views: 1551
Re: Volcanic Glass
Very nice; I particularly like the second image in your re-post. Leonard That is one of my favorites as well. It's also a 100% crop from this image: https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/c8eec5eb-5a15-47a9-b568-e9589f922b00/de8ws1x-8b6822f6-7868-4c46-89c3-10293b6c2fea.jpg/v1/fil...
- Mon Nov 23, 2020 4:06 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Volcanic Glass
- Replies: 8
- Views: 1551
Re: Volcanic Glass
I did manage a bit more magnification, and a deeper stack today. My wife's camera kit has an old 1.4 TC (late '70s vintage) that I'd forgotten about, so I can get 126mm at the cost of some image quality. This one is a 15 frame stack, but it looks like I pushed Focus Stacker past its limits in the co...
- Sun Nov 22, 2020 9:12 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Volcanic Glass
- Replies: 8
- Views: 1551
Re: Volcanic Glass
Very nice subject and image. I wonder if you could be able to show a deeper stack, a stereo pair also would be most enjoyable Thank you :) If I can find that particular spot again (that bit took some damage) I can try for a deeper stack. At this stage in my (very beginning) skill level I would have...
- Thu Nov 19, 2020 9:13 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Volcanic Glass
- Replies: 8
- Views: 1551
Volcanic Glass
Another of my lava samples from the 2018 Kilauea eruption. This time it was seeing what I could get with a piece of tephra - the very light, very fragile ejecta that is shot up in the air from the lava fountains, cools very rapidly, and falls like ash everywhere in the area. It's so light because th...
- Thu Nov 19, 2020 9:00 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Floppy-ear Bunnies
- Replies: 7
- Views: 1570
Re: Floppy-ear Bunnies
Looks like some serious cross-species stuff was kickin' it up between the bunnies and the buggies! Those are some odd looking critters indeed.
But I really like the image!
But I really like the image!
- Fri Oct 23, 2020 9:37 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Fluorite with masking tape
- Replies: 12
- Views: 3584
Re: Fluorite with masking tape
VERY cool images and mineralogy!
- Fri Oct 23, 2020 9:34 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Lovely Lava
- Replies: 0
- Views: 2159
Lovely Lava
A view of some lovely frothy, almost pumice-y, basaltic lava from Kilauea's Lower East Rift Zone 2018 eruption. This is a stack of four frames (Focus Stacker on my Mac). Pentax K-50 w/ Tamron 90mm Macro, LED lighting in a tabletop lightbox. Four x f/8, ISO 100 https://images-wixmp-ed30a86b8c4ca88777...
- Fri Jun 12, 2020 11:38 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Cubic pyrite crystals
- Replies: 1
- Views: 1446
Cubic pyrite crystals
Worked with a fist-sized mass of crystalline pyrite today. Sat it on a fence rail out on the deck, natural shaded light. Tripod and focus rail, Pentax K-50 w/ Tamron SP Di 90mm Macro. Images stacked on the Mac using Focus Stacker and a bit of editing in Gimp. Hopefully the links won't be a problem t...
- Tue Jun 09, 2020 1:25 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Turbidite microstructures
- Replies: 2
- Views: 1082
Thank you. I agree, the URLs from that site are horrible. They made changes a while back and now we are stuck with that vs a decently short address. I did try a couple of times to get it right here, using the preview function, but could't get it. After submitting, I finally had to go back, resave th...
- Mon Jun 08, 2020 4:36 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Turbidite microstructures
- Replies: 2
- Views: 1082
Turbidite microstructures
Not microscopic, just micro... The rock is a remnant washed out of some Puget Sound glacial deposits. Tentatively identified as a limestone (poss.) turbidite sequence. The field of view is about a half inch across. Surface was painted with water for the 7 shot sequence, stacked in 'Focus Stacker' on...
- Mon Jun 08, 2020 3:59 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Goethite in Quartz
- Replies: 8
- Views: 1624
- Sat Apr 04, 2020 5:07 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Question on Trying to shoot a rock under water
- Replies: 7
- Views: 2723
- Sat Apr 04, 2020 4:01 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Question on Trying to shoot a rock under water
- Replies: 7
- Views: 2723
Thanks for all the ideas and suggestions. I think I'll try using boiled water first, and drop the rock in for at least part of the time. The edges of the dish are far enough from the rock that surface curvature is negligible, depth of water at the shallowest over the rock was 2-3 mm. Setup is shown ...