Search found 1867 matches

by Beatsy
Sat Feb 04, 2023 10:14 am
Forum: Equipment Discussions
Topic: Could you enlighten me about the silent shooting?
Replies: 8
Views: 243

Re: Could you enlighten me about the silent shooting?

I use Sony mirrorless cameras for everything these days - micro, macro and, umm, "normal" photography. For static scenes (no motion) silent/electronic shutter works in all circumstances. However, there is a dynamic range penalty with older models in that the bit depth drops from 14-bit to 12-bit in ...
by Beatsy
Tue Jan 17, 2023 1:05 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Manual focus bracketing of small live subjects
Replies: 16
Views: 712

Re: Can I use your image in a class?

Steve, I've agreed to give a short course in focus stacking, to a camera club in Seattle. Your rose from https://www.photomacrography.net/forum/viewtopic.php?p=286534#p286534 would be perfect to use an example, attributed to you of course. Is it OK if I do that, and can I also include the image in ...
by Beatsy
Tue Jan 17, 2023 1:01 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Manual focus bracketing of small live subjects
Replies: 16
Views: 712

Re: Manual focus bracketing of small live subjects

<snip> Do you run into people (who don't do macro or close up photography) who believe that focus stacking has to be super-fussy, with large #s of pictures and a rock steady mount? I've seen that a lot but my message is that it can be pretty simple. I generally don't "run into people" because as an...
by Beatsy
Mon Jan 16, 2023 3:08 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Manual focus bracketing of small live subjects
Replies: 16
Views: 712

Re: Manual focus bracketing of small live subjects

I lamented the lack of automatic focus bracketing on Sony cameras for a couple of years, then gave up waiting and practiced doing it manually. Glad I did too as it's proven very handy, though mainly in the field for me (handheld or with a monopod). There are a surprising number of usable approaches ...
by Beatsy
Thu Jan 12, 2023 3:13 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Details of Cryptorhynchus lapathi, a willow weevil
Replies: 4
Views: 295

Re: Details of Cryptorhynchus lapathi, a willow weevil

Wonderful set. Lots of context and even more lovely zooming in for detail. Just how I like it! Ta.
by Beatsy
Mon Jan 09, 2023 2:40 pm
Forum: Nature Photography -- Macro and Close-up
Topic: Odd Duck
Replies: 5
Views: 303

Re: Odd Duck

An image search for "crested duck" turns up loads of similar ones.
by Beatsy
Mon Jan 02, 2023 1:23 am
Forum: Photography Through the Microscope
Topic: Diatoms: Epithemia sp. dividing
Replies: 12
Views: 855

Re: Diatoms: Epithemia sp. dividing

That's a fantastic image. How did you get the diatom pair to exactly stand on edge? That must have been hard. Thanks Lou. Pure chance and trivially easy in this case. It had simply settled that way in the strew! But it's easy enough to place them with a manipulator too as static tends to hold them ...
by Beatsy
Sun Jan 01, 2023 3:36 am
Forum: Photography Through the Microscope
Topic: Striatella unipunctata
Replies: 10
Views: 507

Re: Striatella unipunctata

Thanks for the detail shot. You've *just* got the punctae resolved in a few spots. Miniliform, at least. Any idea on their spacing?
by Beatsy
Thu Dec 22, 2022 2:17 am
Forum: Photography Through the Microscope
Topic: Diatoms: Epithemia sp. dividing
Replies: 12
Views: 855

Re: Diatoms: Epithemia sp. dividing

I see. This means that I can keep observing and see the whole life cycle. I will try.... 20221222160730.jpg You certainly can observe the full life cycle, but not for individuals locked under a cover slip. AFAIK, conditions there are not conducive to multiplication at all (probably too little silic...
by Beatsy
Thu Dec 22, 2022 12:18 am
Forum: Photography Through the Microscope
Topic: Diatoms: Epithemia sp. dividing
Replies: 12
Views: 855

Re: Diatoms: Epithemia sp. dividing

...I wonder, what will happen to the same size as before? :wink: It will die. The average diatom lifespan is (very approximately) 6 days. Given good conditions (temp, light, pH, nutrients, etc.) a population will double every 24 hours - if there's room to do so. So if the smaller diatoms didn't "re...
by Beatsy
Sun Dec 18, 2022 1:12 am
Forum: General Discussion Forum and Community Announcements
Topic: Videomicrography: water drops.
Replies: 7
Views: 501

Re: Videomicrography: water drops.

Agreed Rik, it's the clumping mechanism, no quantum effect (I should have mentioned that in the original post). You can see several "bands" of volvox building up behind the lego pieces for one thing - before going through the slits. But as you say, the aggregation itself is interesting, and why do b...
by Beatsy
Sat Dec 17, 2022 2:01 am
Forum: General Discussion Forum and Community Announcements
Topic: Videomicrography: water drops.
Replies: 7
Views: 501

Videomicrography: water drops.

This is cool. Great to watch, but I can't help thinking about the how. Doesn't look that hard to set up, given the right cultures, and sparked a fair few ideas too... https://www.youtube.com/watch?v=kfQQc4CaNAk Edit: a "how" video by the same chap - https://www.youtube.com/watch?v=Slwkped573s - and ...
by Beatsy
Fri Dec 16, 2022 1:18 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Amateur uses for fluorescence microscopy?
Replies: 10
Views: 669

Re: Amateur uses for fluorescence microscopy?

... So in short - its totally feasible to get the BX61 working under windows without investing into Olympus software. They ask pretty steep prices for automated control. MM and BX61 are no dream match, in some cases its pretty slow. ... Thanks for that Peter. I will take a look at it when I start g...
by Beatsy
Fri Dec 16, 2022 1:00 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Amateur uses for fluorescence microscopy?
Replies: 10
Views: 669

Re: Amateur uses for fluorescence microscopy?

Beatsy, I like UV excitation much more than visible-light excitation, because the fluorescence is always (under our conditions) of a lower wavelength than the excitation light (a consequence of conservation of energy). This means UV fluorescence can be any color, but green excitation can only produ...
by Beatsy
Thu Dec 15, 2022 2:34 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Amateur uses for fluorescence microscopy?
Replies: 10
Views: 669

Re: Amateur uses for fluorescence microscopy?

Hi, this looks like a standard setup for in situ hybridisation (e.g. for genetics or pathology). DAPI is used as a counterstain in many fixed pathological/biological samples. Spectrum green and spectrum orange are proprietary fluorophores used by abbott. These filter sets are very "narrow" and give...