Search found 317 matches

by iconoclastica
Sun Oct 25, 2020 12:10 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: centering springs
Replies: 6
Views: 166

Re: centering springs

Thanks, I just bought a couple of these, which have a nice long travel distance. I can't find 'm closer at hand for I haven't the remotest idea how we call them...
by iconoclastica
Sun Oct 25, 2020 2:24 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: centering springs
Replies: 6
Views: 166

Re: centering springs

Couple thoughts. First, consider using a 3 point suspension; such as is near universal for microscope heads, condenser mounts, etc. Simpler and less prone to jamming. You'll have one plunger located in a detent on the inner part and two centering screws. For the plunger you can buy off the shelf sp...
by iconoclastica
Sun Oct 25, 2020 2:21 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: centering springs
Replies: 6
Views: 166

Re: centering springs

I concur with Pete Zeiss used both systems in their Standard series microscopes of which I have many components, the 3 points system in most cases works better than the 4 points one, despite the 4 points system movements seems more intuitive (orthogonal displacement) Thanks, this well confirms the ...
by iconoclastica
Sun Oct 25, 2020 2:00 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Laser aiming and focus in photomacrography
Replies: 44
Views: 41783

Re: Laser aiming and focus in photomacrography

The beauty of the DSLR-laser combination is that it works with any objective. I am switching between finite, infinite and of the shelf lenses all the time. When using either finite or infinite objectives, a 90-degree side input can be easily made from a salvaged epi-illuminator. Even the very incomp...
by iconoclastica
Sun Oct 25, 2020 1:43 am
Forum: Photography Through the Microscope
Topic: Another illumination comparison!
Replies: 4
Views: 381

Re: Another illumination comparison!

I think maybe the pseudo-DIC shows slightly more detail ??.
But is it detail you're after, or shape and colour?
BTW, if the subjects are identical, you can easily combine them both by placing each one in a layer in photoshop, and setting one layer's blend mode to illuminance and the other to colour.
by iconoclastica
Sun Oct 25, 2020 1:37 am
Forum: Photography Through the Microscope
Topic: Art of Physics & Chemistry
Replies: 7
Views: 186

Re: Art of Physics & Chemistry

I am impressed, Karl. Deeply so.
by iconoclastica
Sat Oct 24, 2020 12:53 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Laser aiming and focus in photomacrography
Replies: 44
Views: 41783

Re: Laser aiming and focus in photomacrography

Here's the simplest design I could think of. The laser diode is forced into a tight fitting hole. Perhaps this is not up to long time usage and in that case I'll have to find a piece of aluminium tube that can be glued into the base. laserpointer.jpg The base is hooked to the viewfinder (Canon 7D) b...
by iconoclastica
Sat Oct 24, 2020 2:29 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: centering springs
Replies: 6
Views: 166

centering springs

I am making a micro led lamp that can be centered from two concentric rings of aluminium tube. The evident part of the centering mechanism are two screws. What turns out to be less easy are the counter springs. I thought two blobs of silicone rubber would do, the material is easily compressed after ...
by iconoclastica
Tue Oct 20, 2020 3:44 pm
Forum: General Discussion Forum and Community Announcements
Topic: Nikon Small World 2020
Replies: 3
Views: 519

Re: Nikon Small World 2020

Confocal seems to be bound to fluorescense microscopy. Why is that, wouldn't it have the same advantages with 'ordinary light' microscopy?
by iconoclastica
Fri Oct 02, 2020 9:53 am
Forum: Equipment Discussions
Topic: DIY Fluorescence with Zeiss fluoro condenser - help needed
Replies: 72
Views: 5355

Re: DIY Fluorescence with Zeiss fluoro condenser - help needed

DIY photospectrometer.

For the general idea (qualitatively), google for "CD spectrometer".
by iconoclastica
Thu Oct 01, 2020 1:15 pm
Forum: Photography Through the Microscope
Topic: 2 more diatoms
Replies: 3
Views: 433

Re: 2 more diatoms

interesting how the extremities show the same kind of wear as my shoes used to, when I was a kid.
by iconoclastica
Sun Sep 27, 2020 2:25 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Laser aiming and focus in photomacrography
Replies: 44
Views: 41783

Re: Laser aiming and focus in photomacrography

If you have an approach that is simpler still, or even cheaper, I'd be delighted if you share it. More compact isn't a bad thing either, though I have had no problems with the size of my laser assembly. I have it in mind, but it still has to be demonstrated in real making. The diode is on its way f...
by iconoclastica
Sat Sep 26, 2020 2:28 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Laser aiming and focus in photomacrography
Replies: 44
Views: 41783

Re: Laser aiming and focus in photomacrography

The 3V diode draws maximally 45mA, so the max power uptake is 135mW. Does this need a cooling body? The design could remain much simpler and more compact if the housing could be left out. Or perhaps replaced with a tightly fitting piece of aluminium tube.
by iconoclastica
Fri Sep 25, 2020 12:29 pm
Forum: Photography Through the Microscope
Topic: Euendolithic tunnels in flakes on the beach.
Replies: 30
Views: 2999

Re: Euendolithic tunnels in flakes on the beach.

This has been an awesome thread! I have a masters in geology and I didn't even question whether the pictured flakes were mica. I was going to write the same thing before I reached your post :D Decades ago I was determined to become a marine biologist and I spent all my spare time on the beach. Life...
by iconoclastica
Mon Sep 14, 2020 9:46 am
Forum: Photography Through the Microscope
Topic: Euendolithic tunnels in flakes on the beach.
Replies: 30
Views: 2999

Re: Euendolithic tunnels in phyllosilicate on the beach.

micro_pix wrote:
Thu Sep 10, 2020 1:32 am
Here are some of the other finds - up to about 2mm - I don't know what the club/microphone shaped object is.
Dave,

I think is part of the skeleton of a sea-star, in Dorset probably Asterias rubens.

Wim