Search found 4720 matches

by Pau
Sat Nov 21, 2020 11:17 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Volcanic Glass
Replies: 8
Views: 1495

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
by Pau
Sat Nov 21, 2020 11:14 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: What's in the name: filter puzzles
Replies: 1
Views: 833

Re: What's in the name: filter puzzles

Interesting post, this is a somewhat complex world, often unnecessarily arcane. So my question is this: is there in some dark corner of the net a "filter bible" that some tormented soul who has been fighting these same ghosts has compiled? I appreciate the sense of humor. I don't think that anyone h...
by Pau
Thu Nov 19, 2020 1:53 pm
Forum: Equipment Discussions
Topic: 40-60 X Objective lens
Replies: 11
Views: 2505

Re: 40-60 X Objective lens

Higher resolution (0.65 NA) but much shorter working distance
by Pau
Wed Nov 18, 2020 10:05 am
Forum: Photography Through the Microscope
Topic: Twisty diatom and [perhaps] silicoflagellate
Replies: 2
Views: 1039

Re: Twisty diatom and [perhaps] silicoflagellate

Any chance of making a stereo pair of the S. spiralis? It seems an excellent candidate!
by Pau
Wed Nov 18, 2020 2:14 am
Forum: Community Members and Friends
Topic: Got the plague
Replies: 7
Views: 1815

Re: Got the plague

Hi Mike,
In most cases it can stop at this phase, I hope this will be yours.

Best wishes
by Pau
Fri Nov 13, 2020 4:01 am
Forum: Equipment Discussions
Topic: 40-60 X Objective lens
Replies: 11
Views: 2505

Re: 40-60 X Objective lens

Hi, Could this be a good lens for our photography work https://www.ebay.com/itm/163710772822 It needs complementary aberration corrections done at a dedicated compensating eyepiece, so they only would be convenient with the adequate microscope, not for macro style work. More recent Olympus UIS and ...
by Pau
Fri Nov 13, 2020 3:45 am
Forum: Photography Through the Microscope
Topic: Polypodium sporangia fluorescence
Replies: 15
Views: 2137

Re: Polypodium sporangia fluorescence

Thanks, maybe that's the key. Possibly the de-ionised water has a lower surface tension than tap water because of a lack of impurities, it certainly seems to flow more freely on a surface, which would help reduce bubbles. Dave It could be, although I lean to think more about the composition and str...
by Pau
Fri Nov 13, 2020 1:38 am
Forum: Equipment Exchange
Topic: Nikon 20x LWD
Replies: 4
Views: 1173

Re: Nikon 20x LWD

.. The objective offered here is highly specialized: phase contrast and designed to look through 1.2 mm of cover glass. It is not suitable for use as an "extreme macro" objective with normal un-covered subjects Its typical use is with inverted microscopes to view through the bottom of a Petri dish ...
by Pau
Fri Nov 13, 2020 1:34 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: jewel beetle stitch
Replies: 25
Views: 4733

Re: jewel beetle stitch

This is the same as one of the Berzin models, I bought them from china for less money some years ago but this is the only I can find now:

https://www.ebay.com/itm/Stereo-Side-by ... ondition=3
by Pau
Thu Nov 12, 2020 12:41 pm
Forum: Photography Through the Microscope
Topic: Polypodium sporangia fluorescence
Replies: 15
Views: 2137

Re: Polypoium sporangia fluorescence.

Excellent pictures of one of my favorite subjects :D
What UV source and filters did you used?
by Pau
Tue Nov 10, 2020 8:44 am
Forum: Equipment Discussions
Topic: Microscope stage Vs objective Y Axis Movement
Replies: 7
Views: 2225

Re: Microscope stage Vs objective Y Axis Movement

If the stage moves, and with it the condenser, the conjugal plain of the light source cannot remain ath the substage aperture. Why doesn't that matter? With typical transillumination of transparent specimens mounted in glass slides and Köhler illumination I find two reasons: - the sample is very th...
by Pau
Mon Nov 09, 2020 8:00 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Anatomical details of a blister beetle (Lytta vulnerata)
Replies: 6
Views: 1808

Re: Anatomical details of a blister beetle (Lytta vulnerata)

What interesting anatomy and good pictures!
the stereos are excellent, the first and third in special
...what must be the most frightening male copulatory organ that I personally have ever seen

8-[ ouch!
by Pau
Fri Nov 06, 2020 11:13 am
Forum: Beginners Micro
Topic: Help with adjusting contrast
Replies: 6
Views: 1458

Re: Help with adjusting contrast

Yes, as Rik said this is unusual. He has explained the subject very clearly. In any case if the condenser diaphragm hasn't any effect in the light amount it has no any other effect (DOF, contrast and resolution) Did you follow the method removing an eyepiece I explained? After almost 40yrs teaching ...
by Pau
Fri Nov 06, 2020 10:40 am
Forum: Beginners Micro
Topic: Bought My First Microscope
Replies: 5
Views: 629

Re: Bought My First Microscope

Hi Bill, welcome aboard! here you have a very good article on cameras for photomicrography: https://www.canadiannaturephotographer.com/cellphones_dedicatedcameras_DSLRs.html It covers many topics although afocal system with DSLRs is better explained at my post here https://www.photomacrography.net/f...
by Pau
Fri Nov 06, 2020 10:02 am
Forum: Equipment Discussions
Topic: Microscope stage Vs objective Y Axis Movement
Replies: 7
Views: 2225

Re: Microscope stage Vs objective Y Axis Movement

Tube moving for focus was the original configuration of most compound microscopes but If you put on complex binocular (and trino) heads and cameras the focus mechanics has to move all this mass. This is why the stage focus movement has been the preferred design of most serious microscopes from 1940s...