Search found 5353 matches

by Pau
Sat Oct 28, 2023 9:11 am
Forum: Photography Through the Microscope
Topic: Agatized dinosaur bone from 0.7x to 60x
Replies: 10
Views: 5635

Re: Agatized dinosaur bone from 0.7x to 60x

... could that iron oxide have been part of the original blood of the dinosaur? Who knows, but I don't think so. Iron oxides and hydroxides in several mineral species are the most widespread pigments that give sedimentary rocks (and of course fossils) their varied colors. Despite the admirably pres...
by Pau
Tue Oct 24, 2023 8:53 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: fly wing
Replies: 14
Views: 7108

Re: fly wing

Yes, it's the 3D rendering for sure. Your new video shows the same issue, maybe a little less prominent. Thanks for the follow-up.
by Pau
Sun Oct 22, 2023 5:01 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: fly wing
Replies: 14
Views: 7108

Re: fly wing

Nice images, the normal stacks are beautiful although I find the 3D-model ones misleading: what in the stacks (an in a direct observation of diptera wings) are hairs in the models they look like hills, an impression confirmed seeing the 3D animation.
by Pau
Sun Oct 15, 2023 1:59 pm
Forum: Equipment Discussions
Topic: Connecting a DSLR to a Nikon Optiphot
Replies: 16
Views: 6104

Re: Connecting a DSLR to a Nikon Optiphot

At the camera end you need an adapter without built in lens from the male thread you have,likely M42x1, to Nikon F bayonet, a very easy to find accessory. For example https://www.ebay.com/itm/145360830054?hash=item21d82e3e66:g:OXIAAOSwGhVjYzbc&amdata=enc%3AAQAIAAAA0D05LF%2FKkFgcR5WJw%2FPNeeFmnvsQ8RU...
by Pau
Sat Oct 14, 2023 11:07 am
Forum: Photography Through the Microscope
Topic: Lily pollen fluorescence
Replies: 4
Views: 4056

Re: Lily pollen fluorescence

Very nice, but it seems like your Zinnia pollen, not like Lily (Lilium sp) ( viewtopic.php?p=215041#p215041 )
by Pau
Fri Oct 13, 2023 9:22 am
Forum: General Discussion Forum and Community Announcements
Topic: Questions regarding Nikon universal DIC condenser.
Replies: 8
Views: 4068

Re: Questions regarding Nikon universal DIC condenser.

If the DIC components are also for the Optiphot the 0.65 one seems more adequate.
That said, if the 0.75 was adequate it will be nicer...
Is there a Nikon expert to answer it?
by Pau
Fri Oct 13, 2023 2:53 am
Forum: General Discussion Forum and Community Announcements
Topic: Questions regarding Nikon universal DIC condenser.
Replies: 8
Views: 4068

Re: Questions regarding Nikon universal DIC condenser.

Not sure (and I'm not knowledgeable on that Nikon stuff) but I'm almost sure that the NA 0.65 is a CF and the NA 0.75 is a CFN. If so, likely each one will work better when paired with condenser and DIC prisms of the same time/series. Is yours an Optiphot or an Optiphot 2?
by Pau
Fri Oct 06, 2023 1:09 pm
Forum: Nature Photography -- Macro and Close-up
Topic: Eyes on you!
Replies: 8
Views: 4410

Re: Eyes on you!

Again an excellent work!
The spiders are beautiful but because I hate mosquitoes I admire the robberfly picture and action :D Is the prey Aedes albopictus?
by Pau
Tue Oct 03, 2023 4:08 am
Forum: Equipment Discussions
Topic: Huygens Optics Video on Optical Interferometry
Replies: 13
Views: 4723

Re: Huygens Optics Video on Optical Interferometry

Very nice and interesting!
I've most enjoyed the study of microscope objectives towards the end of the video.
by Pau
Fri Sep 29, 2023 1:21 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Thin-film interference colors on pahoehoe lava
Replies: 10
Views: 3774

Re: Thin-film interference colors on pahoehoe lava

So nice and psychedelic, wow!
Congrats.
Could you provide details about the illumination and setup?
by Pau
Thu Sep 28, 2023 3:37 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Fuji GFX microphotography
Replies: 3
Views: 3369

Re: Fuji GFX microphotography

Hi, some pointers: I am exploring shooting very magnified samples on the GFX system but I have never used a microscope so I am trying to find information about what I need to collect in order to capture well. I am interested in shooting between x500-x1000, with dark field polarized light microscopy....
by Pau
Wed Sep 27, 2023 12:53 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: A very elementary question about cameras
Replies: 6
Views: 3577

Re: A very elementary question about cameras

Of course there are more modern -and expensive- options but if you want good image quality and adequate frame coverage on a tight budget, the 5D MkII option seems to me very adequate (providing that it's in good condition and with a clean sensor) The IQ will be similar or likely higher than the 50D ...
by Pau
Mon Sep 25, 2023 8:17 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: wasp
Replies: 7
Views: 1761

Re: wasp

Excellent work!
The stereo makes the structure much clearer: In the first image the left wing front edge end looks very similar to the siting /ovopositor while in the stereo this similarity disappears.
by Pau
Sat Sep 23, 2023 7:39 am
Forum: Equipment Discussions
Topic: Laowa Aurogon Super-Micro lens test and comparison (versus Mitutoyo etc.)
Replies: 36
Views: 10298

Re: Laowa Aurogon Super-Micro lens test and comparison (versus Mitutoyo etc.)

Hi Jason, At the beginning of the thread I (erroneously) asked Macro_Cosmos ... Could you test the objective at its intended parfocal distance without the "tube lenses"? I'm curious about its rear focal distance and "original" magnification alone, and of course about its IQ, image circle and possibi...
by Pau
Wed Sep 20, 2023 9:42 am
Forum: Photography Through the Microscope
Topic: Diatom: Chaetoceros sp. from Paracus, Peru
Replies: 4
Views: 1365

Re: Diatom: Chaetoceros sp. from Paracus, Peru

Very nice!

Are you sure that the location is Paracus and not Paracas? (I have good memories of the Paracas peninsula, a desert place in the Peru coast now a natural reserve where I traveled when young)