Search found 2140 matches

by Beatsy
Thu Jan 25, 2024 2:45 pm
Forum: Photography Through the Microscope
Topic: Diatoms: Kittonia elaborata (edit: stereo added)
Replies: 26
Views: 1859

Re: Diatoms: Kittonia elaborata (edit: stereo added)

Wow, beautiful! The stereo makes the shroom-like appendages really pop out of the plane. I wonder what these appendages are useful for ... I understand why people can get addicted to putting diatoms under their scopes! By "chipped" you mean that little dent at the lower edge? C'mon! :wink: The plat...
by Beatsy
Thu Jan 25, 2024 8:23 am
Forum: Photography Through the Microscope
Topic: Diatoms: Kittonia elaborata (edit: stereo added)
Replies: 26
Views: 1859

Re: Diatoms: Kittonia elaborata (edit: stereo added)

Thanks for your comments everyone.

Pau, bigger version here. You'll be looking out of your ears if you get too close though :D

https://live.staticflickr.com/65535/534 ... 8c4d_o.jpg
by Beatsy
Wed Jan 24, 2024 1:38 pm
Forum: Photography Through the Microscope
Topic: Diatoms: Kittonia elaborata (edit: stereo added)
Replies: 26
Views: 1859

Diatoms: Kittonia elaborata (edit: stereo added)

I intended to crow about finally finding a *perfect* example of this species after several years of searching. Not constantly searching, just as and when I got material that contained this species. Every example I found to date (that was more than a broken fragment) had either something missing, a h...
by Beatsy
Wed Jan 24, 2024 1:06 pm
Forum: Equipment Discussions
Topic: Help! Macro rail minimum 1µm step size is too big.
Replies: 34
Views: 3925

Re: Help! Macro rail minimum 1µm step size is too big.

I ordered this one. https://www.mjkzz.de/collections/ultra-series/products/ultra-mini-rail-v2-kit-incl-ir-controller?variant=42408686813429 I have a similar dial gauge to yours, but the 0-100 scale goes right round the dial. Measuring "known thickness" feeler gauges (also checked on a hi-res microme...
by Beatsy
Wed Jan 24, 2024 7:41 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: some scales
Replies: 158
Views: 17481

Re: some scales

For short-lived subjects like fragile flowers, flash is very helpful, to avoid the continuous light source over-heating the subjects and causing them to wilt during a long stack. I had the "clever" idea of using a tiny plastic centrifuge tube as a vase to stand small flowers in, with wet cotton woo...
by Beatsy
Wed Jan 24, 2024 6:10 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: some scales
Replies: 158
Views: 17481

Re: some scales

Main thing is to pick the right kind of sheet. There will be a few layers of "stuff". Sometimes there's a ~2mm thick opaque but transluscent sheet of material - that's not what you want. The diffuser is not much thicker than paper, smooth on one side with a fine frosted texture on the other. If you ...
by Beatsy
Wed Jan 24, 2024 5:30 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: some scales
Replies: 158
Views: 17481

Re: some scales

... But I would only need stronger LEDs for the scales. Assuming you're shining light through the diffuser, then less light-hungry diffusion material could help instead. The sheet(s) of diffuser found inside (broken) flat-screen TVs and computer monitors are very good in this regard - though it's b...
by Beatsy
Wed Jan 24, 2024 2:21 am
Forum: Equipment Discussions
Topic: Help! Macro rail minimum 1µm step size is too big.
Replies: 34
Views: 3925

Re: Help! Macro rail minimum 1µm step size is too big.

Incidentally, how do you measure off-axis drift? I use several methods, which I will describe in a separate thread. This is now posted at https://www.photomacrography.net/forum/viewtopic.php?f=8&t=46907 , "Methods to evaluate performance of a focus rail". --Rik Thanks Rik, I did see that and your t...
by Beatsy
Sun Jan 21, 2024 1:39 am
Forum: General Discussion Forum and Community Announcements
Topic: Plants "talking" to each other
Replies: 0
Views: 418

Plants "talking" to each other

An excellent video from Anton Petrov. Well worth a look. https://www.youtube.com/watch?v=hd-h_y1X4oA Yes - it's chemical signalling rather than talking, but communication between plants all the same. Anton posts mostly astronomy content. Always about intriguing new discoveries and every day without ...
by Beatsy
Fri Jan 19, 2024 5:14 am
Forum: Equipment Discussions
Topic: Godox Fv150/200 do you have any opinions?
Replies: 7
Views: 455

Re: Godox Fv150/200 do you have any opinions?

Ooh, I like the look of that extension! I didn't know Godox offered it. I have two AD200s but lack of space prevents me (easily) using both at once on my rail setup. Those extensions would solve that. Thanks for the heads up.

Cheers
Beats
by Beatsy
Wed Jan 17, 2024 9:35 am
Forum: General Discussion Forum and Community Announcements
Topic: AI Photo Use So Widespread is Sad to See
Replies: 19
Views: 896

Re: AI Photo Use So Widespread is Sad to See

Hardly surprising that big media outlets use so much AI-generated imagery. They stopped representing reality a looong time ago! I have no beef with AI imagery when used in the right context (e.g. art or entertainment). But in areas that are supposed to be factual, i.e. news, documentaries or things ...
by Beatsy
Wed Jan 17, 2024 1:22 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Scales - pushing the envelope (of my kit)
Replies: 8
Views: 923

Re: Scales - pushing the envelope (of my kit)

The science would suggest you need to resolve the wavelength of light that is reflected. That would put the blue scales beyond the reach of the TU Plan 50X. Maybe the Papilio blumei, a green species, would acheive the results sought (as the specs indicate the objective can resolve 0.5 μm.) ... Than...
by Beatsy
Tue Jan 16, 2024 1:33 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Scales - pushing the envelope (of my kit)
Replies: 8
Views: 923

Scales - pushing the envelope (of my kit)

Hi all, After acquiring a Nikon TU 50x/0.8 PlanAPO epi objective (at last) I discovered that the minimum 1µm steps of my rail aren't small enough to get the best from this lens. So, what better "justification" could one wish for to order a new rail that does smaller steps (MJKZZ Ultra Mini 2)? So I ...
by Beatsy
Sat Jan 13, 2024 12:33 am
Forum: Equipment Discussions
Topic: Mitutoyo TAGLENS Liquid Tube Lens for Ultra Deep DOF
Replies: 6
Views: 735

Re: Mitutoyo TAGLENS Liquid Tube Lens for Ultra Deep DOF

Wow, that's a really interesting gizmo, and seemingly an answer to a long term daydream (faster capture of focus brackets), but... At what price? Probably swoon-inducing. The miniscule FoV (with relatively low resolution objectives) makes it significantly less desireable. And 70k frames/sec must sur...
by Beatsy
Fri Jan 12, 2024 4:53 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: P. ulysses (things get serious)
Replies: 8
Views: 731

Re: P. ulysses (things get serious)

Excellent result. The chunkier detail on the blue scales really lifts the whole image.

I found a long lost box of assorted butterflies today. I got them from a butterfly farm about three years ago and put them away safely. Too bloomin' safely!

Guess what I'll be shooting tomorrow 😁