Search found 486 matches

by iconoclastica
Tue Dec 12, 2023 2:33 pm
Forum: Equipment Discussions
Topic: screws dropped into the knobs that won't come off
Replies: 2
Views: 2420

Re: screws dropped into the knobs that won't come off

OK, some progress made. At the left side there was just enough room to slit in the blade of a small flat screwdriver between the fine and coarse knob and then turning the blade a bit to force the knobs apart. Working round the knob, changing twice to a larger screwdriver, the fine focus know gradual...
by iconoclastica
Mon Dec 11, 2023 2:10 pm
Forum: General Discussion Forum and Community Announcements
Topic: Neoprene pad
Replies: 12
Views: 6107

Re: Neoprene pad

Are you sure this is neoprene? It reminds me of closed cell foam.
by iconoclastica
Mon Dec 11, 2023 12:57 pm
Forum: Equipment Discussions
Topic: screws dropped into the knobs that won't come off
Replies: 2
Views: 2420

screws dropped into the knobs that won't come off

A number of years ago, Rik described how the fine focus knobs of the Labophot-2 would not come off following the procedure described in the repair manual ( How To Break the Famous Labophot-2 Plastic Focus Gear ). I now seem to have the same issue, only I assume my gears are still undamaged. Last wee...
by iconoclastica
Fri Nov 03, 2023 1:07 pm
Forum: Photography Through the Microscope
Topic: Sporangia
Replies: 4
Views: 2968

Re: Sporangium

Think the title of the topic ought to be "sporangia". I see about a hundred of 'm.
by iconoclastica
Sat Oct 28, 2023 12:57 pm
Forum: Equipment Discussions
Topic: correct tube length for two finite metallurgical objectives
Replies: 4
Views: 2438

Re: correct tube length for two finite metallurgical objectives

According to my table of Olympus objective designations, your LWD MPlan lens is corrected for a 210 mm tube length. So are the Nikon MPlans. You will get an image at 160mm, but there won't be any parfocality. For just a quick look it works, though. BTW, the extra 50mm tube length comes from the exp...
by iconoclastica
Mon Jul 31, 2023 5:42 am
Forum: Photography Through the Microscope
Topic: Help with ID please
Replies: 8
Views: 1215

Re: Help with ID please

tomt wrote:
Sun Jul 30, 2023 11:51 pm
This is a liverwort of the genus Telaranea. Near impossible to determine species without a lot of other information.
Thanks, Tom. Judging by the images that popup googling that name, it is likely to be correct. I never have seen hepatics of that model before.

Wim
by iconoclastica
Fri Jul 07, 2023 3:27 am
Forum: Photography Through the Microscope
Topic: Help with ID please
Replies: 8
Views: 1215

Re: Help with ID please

I had to look up what is a 'weft fern' ( :oops: ), but indeed, Crepidomanes/Trichomanes is a serious candidate. I wonder how I could verify that. I never have seen the gametophytes well enough to recognize them myself.

I am trying to see now whether they will rehydrate and grow any further.
by iconoclastica
Wed Jun 28, 2023 5:20 am
Forum: Photography Through the Microscope
Topic: Help with ID please
Replies: 8
Views: 1215

Re: Help with ID please

That would be the best applicable description indeed.

--------------------------------

This is sofar the best pic of the host I have found. The threads are not so much on the leaf's surface (which it hardly has) but knotted over and under its side axes.
T capillacea.jpg
by iconoclastica
Tue Jun 27, 2023 1:11 pm
Forum: Photography Through the Microscope
Topic: Help with ID please
Replies: 8
Views: 1215

Re: Help with ID please

Very curious. Where was it? On branches of trees? Or on leaf surfaces? I am seeing it now, at home, intertwined with the near skeletal leaves of Trichomanes capillacea from Honduras. The finely divided leaves catch all sorts: hepatics, bryophytes, fern spores and sporangia. But these threads do not...
by iconoclastica
Tue Jun 27, 2023 11:14 am
Forum: Photography Through the Microscope
Topic: Help with ID please
Replies: 8
Views: 1215

Help with ID please

branched threads of this were growing between small epiphytes in the tropical cloud forest. What organism is this? Moss, alga, or fern gametophytes? In the latter case, Trichomanes is the most likely, but I do not have arguments to base any opinion on. 4x.jpg 20xA.jpg Here and there there are "egg s...
by iconoclastica
Mon May 29, 2023 12:21 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Raw images in Zerene
Replies: 6
Views: 2520

Re: Raw images in Zerene

Generally it is best to use the least-compressed, highest-bit-depth file format you possibly can in Zerene. So I would not use your workflow. I'd recommend converting he RAW files to tiffs, editing them in lightroom (without excessive sharpening), then stacking the tiffs in Zerene, and working with...
by iconoclastica
Wed May 24, 2023 11:15 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Lens glare with white backgrounds
Replies: 7
Views: 1951

Re: Lens glare with white backgrounds

The background needs not be larger than just extending beyond the contour of the object. The remainder can be painted white in post. But: contrast in the background will be visible in curved surfaces if these are only a bit shiny. In addition: don't overdo the background lighting. Match the backgrou...
by iconoclastica
Sat May 20, 2023 5:36 am
Forum: Equipment Discussions
Topic: Nikon Labophot missing part
Replies: 16
Views: 3680

Re: Nikon Labophot missing part

This would have been my guess, too. But at least one of my Labophot 2 stands has three screws on top; most of my other Labophot 2 stands that I looked at have six. (I have other Labophot 2 stands that I didn't look at.) My optiphot(-1) seems to have three screws indeed. Judged from below with the t...
by iconoclastica
Thu May 11, 2023 3:48 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Tips for microphotography of specimens in fluid
Replies: 7
Views: 1986

Re: Tips for microphotography of specimens in fluid

For small enough subjects, don't forget about Brownian motion. I've seen serious research efforts attempting to hold small particles, within aqueous suspension, in one place against the random "kicks" of Brownian motion. Agreed, but small crustaceans are rather large to be moved by the kicks of ran...
by iconoclastica
Wed May 10, 2023 5:16 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Tips for microphotography of specimens in fluid
Replies: 7
Views: 1986

Re: Tips for microphotography of specimens in fluid

and barnacle limbs that are sub-millimeter in size So, we are talking 20x and up? Personally with such magnifications I switch to the compound microscope. I know some use up to 100x objectives in macro setups, but I don't think I have seen a rationale for that approach. With the microscope, you sti...