Search found 20009 matches
- Thu Apr 18, 2024 9:35 pm
- Forum: Equipment Discussions
- Topic: MEJIRO GENOSSEN FL0530 4.0/110 FLOAT LENS TEST IS FINALLY ONLINE
- Replies: 78
- Views: 5015
Re: MEJIRO GENOSSEN FL0530 4.0/110 FLOAT LENS TEST IS FINALLY ONLINE
Now I have to figure out how large extension steps are required for focus bracketing as I assume the standard calculators are only valid if one moves the hole rig but not if one uses back focus That's correct and the adjustment is simple: the back focus step is larger by a factor of magnification s...
- Thu Apr 18, 2024 6:06 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: kitchen ants (pictures added)
- Replies: 29
- Views: 1728
Re: kitchen ant (pictures added)
This is another image of the external muscle. Crossed-eye stereo on top, parallel on bottom: https://janrik.net/MiscSubj/2024/KitchenAnt_20240122/stereo-029458-029677_000_small.jpg Shot with Nikon 20X NA 0.75 objective on Raynox DCR-150 plus a 1.4X teleconverter, for a measured 30X on sensor of Cano...
- Thu Apr 18, 2024 1:36 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: some scales
- Replies: 156
- Views: 16881
Re: some scales
I prepared my subject by gluing a small piece of wing to a flat surface. Then I let it dry under pressure from the top through a microscope slide. After this I would expect a flat wing. However, it may be that the wing (or the glue) has been deformed by the LED lighting. I am reminded that wings ca...
- Wed Apr 17, 2024 5:59 pm
- Forum: Photography Through the Microscope
- Topic: Lottery card shavings - Wild M400
- Replies: 2
- Views: 73
Re: Lottery card shavings - Wild M400
Interesting indeed, especially when I was trying to make sense of it crossed! (The layout is parallel.)
With aid of viewer, the structure nicely resolves to be very thin multicolored plates, with a few isolated fibers to mix things up.
--Rik
With aid of viewer, the structure nicely resolves to be very thin multicolored plates, with a few isolated fibers to mix things up.
--Rik
- Tue Apr 16, 2024 9:49 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: cross-sections of MLCCs (multi-layer ceramic capacitors)
- Replies: 12
- Views: 352
Re: cross-sections of MLCCs (multi-layer ceramic capacitors)
Hello Rik, I've had a look at the 3D model in Sketchfab. In my opinion, the surface structure comes out very well. Best, ADi Excellent! In the meantime, I think I figured out how to do geometrically correct scaling based on the object's physical size and stack depth. That info is now in the recipe ...
- Tue Apr 16, 2024 4:14 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Zerene --> Blender --> Sketchfab: essentials for newbies
- Replies: 1
- Views: 90
Zerene --> Blender --> Sketchfab: essentials for newbies
This post is to provide a recipe for using Zerene Stacker and Blender to construct 3D models that can be uploaded and displayed at Sketchfab. An example of the result can be seen at https://sketchfab.com/3d-models/microstructure-of-a-fractured-mlcc-die-745ae741389a4e59ac6822b2e68507a9 , "Microstruct...
- Tue Apr 16, 2024 1:36 pm
- Forum: General Discussion Forum and Community Announcements
- Topic: "Yellow screen" mask generation using 589 nm sodium light
- Replies: 0
- Views: 40
"Yellow screen" mask generation using 589 nm sodium light
A recent video (April 7, 2024) was recommended to me by YouTube: "This Invention Made Disney MILLIONS, but Then They LOST It!" The title is clickbait, but the content is very interesting anyway. What the video actually describes is a sort of "yellow screen" technique that is similar to green screen ...
- Tue Apr 16, 2024 11:09 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: cross-sections of MLCCs (multi-layer ceramic capacitors)
- Replies: 12
- Views: 352
Re: cross-sections of MLCCs (multi-layer ceramic capacitors)
Thanks for all your comments and questions. I apologize for my delay in responding! In doing some further investigation I ended up diving into a rabbit hole, which has been consuming most of my think time for the last week or so. I've often wondered whether it would be a good idea to coat specimens/...
- Tue Apr 16, 2024 8:43 am
- Forum: Equipment Discussions
- Topic: New Rail from AstrHori
- Replies: 3
- Views: 152
Re: New Rail from AstrHori
Heh, what's an extra zero between friends?
Yeah, that looks like a standard metric micrometer, 0.5 mm per turn, 10 microns per tick mark. But that's pretty good up through 5X, usable at 10X.
I have written to AstrHori to confirm or correct.
--Rik
- Mon Apr 15, 2024 10:50 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: For you micro-mineral photography people, how do you deal with holding minuscule, fragile specimens?
- Replies: 11
- Views: 246
Re: For you micro-mineral photography people, how do you deal with holding minuscule, fragile specimens?
and uhhhh, I might have to necromance your old thread on the cystidia sub-linked in your fiber/springtail thread! (unless that's a huge no-no) Resurrecting old threads is OK as long as the new posting adds information or asks a relevant question, and does not look like it's being done with intent t...
- Mon Apr 15, 2024 8:47 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: For you micro-mineral photography people, how do you deal with holding minuscule, fragile specimens?
- Replies: 11
- Views: 246
Re: For you micro-mineral photography people, how do you deal with holding minuscule, fragile specimens?
It's a bit fiddly, but supporting the specimen on a bed of fibers can give some extra freedom for stable positioning. For an ancient example, see https://www.photomacrography.net/forum/viewtopic.php?p=2796#p2796 (and the surrounding thread). Edited to add: the stereo view at https://www.photomacrogr...
- Thu Apr 11, 2024 5:56 pm
- Forum: Equipment Discussions
- Topic: Panasonic 45-175 mm as tube lens / focus bracketing
- Replies: 20
- Views: 483
Re: Panasonic 45-175 mm as tube lens / focus bracketing
I have noticed a recent change in behavior of notifications from the forum. Nowadays I do not get a notification of new replies to a post I have responded to. Maybe some flag got cleared by me accidentally?? It's also possible that some conflict has developed between the email servers used by you a...
- Thu Apr 11, 2024 1:26 pm
- Forum: Equipment Discussions
- Topic: Panasonic 45-175 mm as tube lens / focus bracketing
- Replies: 20
- Views: 483
Re: Panasonic 45-175 mm as tube lens / focus bracketing
Björn, Regarding your PM, see FAQ: There's a PM stuck in my Outbox. What's wrong? Most likely Lou is just away from his computer for a while and will see your message when he gets back. As for focus bracketing, I have no experience with that exact lens but perhaps some general info will help. A good...
- Thu Apr 11, 2024 11:40 am
- Forum: Equipment Discussions
- Topic: No sharpness when using mitutoyo 10x (also halo, low contrast)
- Replies: 16
- Views: 662
Re: No sharpness when using mitutoyo 10x (also halo, low contrast)
I think i solve the problem witch was the light control from the back. It seems that the HR is much more sensitivie for it. I spend couple days to have more controled light and below are results ... 10:1 HR by Radoslaw DIY , on Flickr Thanks for the update. I downloaded the maximum resolution image...
- Thu Apr 11, 2024 10:35 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: rotating worms
- Replies: 4
- Views: 465
Re: rotating worms
Well the stationary pixels or dust particles are always in the same spot so naturally they will produce an artificial "line" in space during stacking. With a rocking stereo the application basically assumes this "line" exists and will animate it like the rest. Just so, and well said! Also important...