Search found 2107 matches

by Beatsy
Wed Dec 20, 2023 3:55 am
Forum: Photography Through the Microscope
Topic: Some diatoms from Oamaru with 450nm light
Replies: 6
Views: 3512

Re: Some diatoms from Oamaru with 450nm light

Great set and an interesting variety of forms.

Those Glyphodiscus sp. are generally quite rare in (most) Oamaru material. Often tiny and easy to miss too. Nice find.

Cheers
by Beatsy
Tue Dec 19, 2023 7:19 am
Forum: Photography Through the Microscope
Topic: Diatom dotting - again, but smaller
Replies: 19
Views: 6278

Re: Diatom dotting - again, but smaller

Olympus UPlanSAPO 100/1.40
by Beatsy
Tue Dec 19, 2023 1:06 am
Forum: Photography Through the Microscope
Topic: Diatom dotting - again, but smaller
Replies: 19
Views: 6278

Re: Diatom dotting - again, but smaller

Lou Jost wrote:
Mon Dec 18, 2023 6:37 pm
Fantastic work!!! Wish I could do that. Maybe you don't need the death ray after all....
Thanks Lou. I agree I don't need it. But want trumps logic and reason... :D
by Beatsy
Mon Dec 18, 2023 11:59 am
Forum: Photography Through the Microscope
Topic: Diatom dotting - again, but smaller
Replies: 19
Views: 6278

Re: Diatom dotting - again, but smaller

Beatsy, not quite the same contrast as yours, but this was my go using a 63x Leitz NA 1.40 Plan Apo objective, and 365nm light - https://jmcscientificconsulting.com/uv-microscopy-high-resolution-imaging-poroids-in-pinnularia-diatoms/ You still got all the details though, NA is the thing. Great resu...
by Beatsy
Mon Dec 18, 2023 11:54 am
Forum: Photography Through the Microscope
Topic: Diatom dotting - again, but smaller
Replies: 19
Views: 6278

Re: Diatom dotting - again, but smaller

Impressive resolution! Was the 16 frame pixel shift enough to out-resolve the performance of the objective or could you squeeze even more out of the objective with a higher resolution sensor? I'm pretty sure I get all the detail with 4-shot pixel shift actually (mainly to preserve colour resolution...
by Beatsy
Sun Dec 17, 2023 1:11 pm
Forum: Equipment Discussions
Topic: Poltergeist in my basement
Replies: 61
Views: 27735

Re: Poltergeist in my basement

Does your camera have any settings for sensor stabilization? I don't know if it could be related :-k I have thought about that. Yes, the camera do have IBIS. I have it turned off, but not sure if sensor is still "floating" or is being locked :-k When shooting in HR it's floating though for an obvio...
by Beatsy
Sat Dec 16, 2023 11:46 am
Forum: Photography Through the Microscope
Topic: Diatom dotting - again, but smaller
Replies: 19
Views: 6278

Diatom dotting - again, but smaller

I hit a personal best today, resolving the dots in Pinnularia sp. at 185nm spacing. Shot under brightfield, 365nm UV light with a 100/1.4 objective. Single image (no stacking) but shot with 16-shot pixel shift for improved resolution and image scale. Contrast was enhanced using tone-mapping in Affin...
by Beatsy
Sat Dec 16, 2023 11:20 am
Forum: Photography Through the Microscope
Topic: Rhizomnium punctatum, the dotted thyme-moss
Replies: 2
Views: 2260

Re: Rhizomnium punctatum, the dotted thyme-moss

That's a very distinctive-looking moss and beautifully photographed. Thanks
by Beatsy
Thu Dec 14, 2023 1:20 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Debunking the high NA / coverslip correction myth
Replies: 73
Views: 32220

Re: Debunking the high NA / coverslip correction myth

Great picture and proof of the concept. I understand that older (ancient) finite optics microscopes allowed you to adjust the tube length to compensate for coverslips and correct for SA. Same principle I guess.
by Beatsy
Sat Dec 02, 2023 2:54 pm
Forum: Photography Through the Microscope
Topic: Oamaru diatom - Biddulphia sp
Replies: 10
Views: 4568

Re: Oamaru diatom - Biddulphia sp

Very engaging image, as always. Great stuff.

Diatom-related debris doesn't look anywhere near as interesting under my scope! :cry:
by Beatsy
Wed Nov 29, 2023 2:32 am
Forum: Photography Through the Microscope
Topic: A small diatom arrangement
Replies: 13
Views: 7441

Re: A small diatom arrangement

jmc wrote:
Wed Nov 29, 2023 2:22 am
Beautiful. Very Christmassy.
I would respond with, "Bah! Humbug.", but that's much too Christmassy for this cynical old grump too... :D

Thanks for your kind feedback everyone. Appreciated.

Cheers
Beats
by Beatsy
Tue Nov 28, 2023 8:49 am
Forum: Photography Through the Microscope
Topic: A small diatom arrangement
Replies: 13
Views: 7441

A small diatom arrangement

With winter imminent a diatom arrangement idea sprang to mind. Then OCD demanded it be done. So here it is, a diatom "snow globe". Snow Globe--pmn.jpg I selected material from a mystery vial of cleaned diatoms for this one. It was labelled "small unknown" and was indeed nearly all small forms with o...
by Beatsy
Sat Nov 25, 2023 3:01 pm
Forum: Equipment Discussions
Topic: Poltergeist in my basement
Replies: 61
Views: 27735

Re: Poltergeist in my basement

You say it's not heat related, but could the (what looks like) metal table be expanding and contracting with room temperature changes? You've only got (something like) 0.5µm DoF with a high NA 50x objective and there's quite a lot of table between the rail and the subject positioner. There could eas...
by Beatsy
Sat Nov 25, 2023 10:39 am
Forum: Beginners Macro
Topic: Noobie with new lens and new concerns
Replies: 5
Views: 5772

Re: Noobie with new lens and new concerns

I have that Neewer Telephoto Lens Support Bracket. I got it for longer/heavier macro setups. It's fine for use on a tripod (presumably in the field), but that "dangly down" bit at the front is a pain in a studio setting. I had to raise my rail setup quite far above the table top to accomodate it - a...