Search found 87 matches

by bralex
Tue Oct 20, 2020 3:04 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Fluorite with masking tape
Replies: 8
Views: 870

Re: Fluorite with masking tape

No longwave response at all, I'm currently charging my shortwave light to check, but I don't expect anything.

Thanks for the kind words!

ETA: nothing for shortwave either. Fluorite is hit-or-miss in any case, and, if it's goethite, that wouldn't do anything.
by bralex
Tue Sep 22, 2020 8:12 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Yien's collection of crystal polarized light microphotography
Replies: 23
Views: 729

Re: Yien's collection of crystal polarized light microphotography

leonardturner wrote:
Tue Sep 22, 2020 3:31 am
Beautiful set, but I am fascinated by the third image, which has a 3-dimensional quality. Would love to see that one in stereo!

Leonard
It makes me think of dancers! Great images, thanks for sharing OP!
by bralex
Mon Sep 14, 2020 7:00 pm
Forum: Equipment Discussions
Topic: Test wafer distribution: Many features, includes res chart
Replies: 80
Views: 13868

Re: Test wafer distribution: Many features, includes res chart

Mine also arrived today, about 8 pieces. Glued to a slide, all is well. Almost exactly 3 months...
by bralex
Fri Sep 11, 2020 8:51 am
Forum: General Discussion Forum and Community Announcements
Topic: Japan --> US shipping/customs/duties on lenses?
Replies: 1
Views: 584

Japan --> US shipping/customs/duties on lenses?

I'm looking to purchase a new objective from Japan. The idea is that a friend there will buy it for me, and ship it here to the US. Neither of us know anything about what duties/tariffs might apply specifically to a microscope objective, and my internet searches have not been productive (too specifi...
by bralex
Tue Sep 08, 2020 3:41 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Tranforming diatoms into magnesium replicas
Replies: 5
Views: 736

Re: Tranforming diatoms into magnesium replicas

I think he's saying "magnesia" not "magnesium" when he talks about the replica.
by bralex
Mon Sep 07, 2020 9:38 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Fluorite with masking tape
Replies: 8
Views: 870

Re: Fluorite with masking tape

Lovely! I have never seen this before either. But I was reading recently about kintsugi , a Japanese method of repairing ceramics in which the repaired seam is deliberately highlighted in gold. This image reminded me instantly of that idea. --Rik I saw that too! I love the idea of balancing preserv...
by bralex
Sun Sep 06, 2020 9:13 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Fluorite with masking tape
Replies: 8
Views: 870

Fluorite with masking tape

Ok, it's not really masking tape, but that's what it makes me think of. Selective growth of an unknown mineral on the edges of fluorite cubes.
by bralex
Sun Aug 30, 2020 10:08 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Hematite from Nordmark Sweden
Replies: 1
Views: 635

Hematite from Nordmark Sweden

New lighting, new macro rail, even some new lenses (though not used for this one). Suggestions for improvement welcome.

Hematite and Clinochlore, Newmark District, Sweden. FOV ~12 mm


Hematite Nordmark SWE small.jpg
by bralex
Mon Aug 10, 2020 7:10 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Macro Product Photo Help Needed
Replies: 11
Views: 1746

Re: Macro Product Photo Help Needed

I was waiting for the critiques, because to my untrained eye that's a pretty good photo. I'll echo the other commenters and suggest a brighter colored background to make removal/replacement easier.
by bralex
Fri Jul 10, 2020 8:11 am
Forum: Equipment Discussions
Topic: Godox 150W Video LED Light
Replies: 8
Views: 3822

Re: Godox 150W Video LED Light

Sorry to revive an old thread. I'm shopping for a Godox SL150W right now, and noticed the updated model claims 8X lux (58000 vs. 7200 @ 1m, specs from the Godox website) and better color rendition. Does that seem plausible? Partly, I'm wondering if your test was on an "interim" model that had - as y...
by bralex
Thu Jul 09, 2020 12:09 pm
Forum: Equipment Exchange
Topic: Old Olympus film back x 2
Replies: 2
Views: 1033

Re: Old Olympus film back x 2

At this point, I just want them out of my office. Make an offer, I'll probably accept.
by bralex
Fri Jun 19, 2020 7:28 am
Forum: Photography Through the Microscope
Topic: Bubbles (polarized light).
Replies: 3
Views: 868

Terrific pictures! I also like the 4th one best!
by bralex
Tue Jun 16, 2020 7:23 am
Forum: General Discussion Forum and Community Announcements
Topic: Scheduled upgrade of the forum software
Replies: 6
Views: 1807

Thank you for testing a bunch first! Unusual to say the least :)
by bralex
Mon Jun 08, 2020 3:56 pm
Forum: Equipment Discussions
Topic: Troubleshooting small focus differences
Replies: 11
Views: 852

Both were on and set to 0 delay previously. Setting both to 1/4 sec delay improved things. Setting each and both to 0 delay again left things in good shape. My only thought is that one of the firmware updates reset/turned off silent mode, but left the setting indicator in the menu on. I'd never noti...
by bralex
Mon Jun 08, 2020 1:16 pm
Forum: Equipment Discussions
Topic: Troubleshooting small focus differences
Replies: 11
Views: 852

Reshot more-or-less the same thing, with much better results. I'd been thinking of external vibration, not internal. My whole house is sadly prone to vibration. I'm using a new WeMacro rail system, which is fairly lightweight. Here's another frame and the final result - I'm working on better techniq...