Search found 182 matches
- Sat Apr 20, 2024 8:05 pm
- Forum: Home-made microscope adaptations
- Topic: half mirror
- Replies: 2
- Views: 101
Re: half mirror
Excellent, now I am getting proper search results. I see the prices vary manyfold. Are there quality issues I ought to be aware of?
- Sat Apr 20, 2024 7:13 pm
- Forum: Home-made microscope adaptations
- Topic: Looking for a NICE dust cover
- Replies: 25
- Views: 6085
Re: Looking for a NICE dust cover
Ha! Generations after concrete lice have turned those apartment blocks to dust, your Optiphot will still stand proudly!Sure Squintsalot wrote: ↑Fri Jun 16, 2023 5:04 amMy optiphot is built like soviet era apartment complex
- Sat Apr 20, 2024 7:05 pm
- Forum: Home-made microscope adaptations
- Topic: half mirror
- Replies: 2
- Views: 101
half mirror
A week ago I got a Nikon epi-illuminator which I would like to put to use. Only the mirror is broken. Now I globally know this was a half transparent mirror, but what is the technical name for it I'd be looking for when searching for a replacement? I get confused by all the laser optics stuff..
- Tue Dec 12, 2023 9:33 pm
- Forum: Microscopes and optics
- Topic: optiphot-1: fine focus knob trouble
- Replies: 9
- Views: 5094
Re: optiphot-1: fine focus knob trouble
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...
- Mon Dec 11, 2023 7:34 pm
- Forum: Microscopes and optics
- Topic: optiphot-1: fine focus knob trouble
- Replies: 9
- Views: 5094
Re: optiphot-1: fine focus knob trouble
There is a manual named: Nikon OPTIPHOT BODY LABOPHOT REPAIR MANUAL Thank you, but see my first message in this topic. That manual is either incorrect, or I am misinterpreting it. It says to unscrew the screw (doesn't warn for loosening it too far) and then the knobs would come off, as I read it. A...
- Sun Dec 10, 2023 7:34 pm
- Forum: Microscopes and optics
- Topic: optiphot-1: fine focus knob trouble
- Replies: 9
- Views: 5094
Re: optiphot-1: fine focus knob trouble
I think this photo of Bekenbleu's probably explains what happened to me: https://blekenbleu.github.io/microscope/Nikon/Labophot/hex1.3mm.jpg Yet I still cannot remove either knob. There's some play (c. 1-2mm) along the fine focus axis, but then it stops completely. Must be inside, the knobs are holl...
- Sun Dec 10, 2023 3:10 pm
- Forum: Microscopes and optics
- Topic: optiphot-1: fine focus knob trouble
- Replies: 9
- Views: 5094
optiphot-1: fine focus knob trouble
In order to take exact meaurements of the fine focus knob size and tapering, I tried to take the left one off. According to the repair manual, I tried to do it the correct way: DISASSEMBLY PROCEDURE 1. Coaxial Coarse and Fine Focus Unit (OPTOPHOT, LABOPHOT) (Fig. 110) 1) Releasing HS screw [142A], r...
- Tue Dec 05, 2023 10:47 am
- Forum: Specimens, samples and slides
- Topic: Stomates and cellulose acetate butyrate- any experiences?
- Replies: 17
- Views: 5190
Re: Stomates and cellulose acetate butyrate- any experiences?
Have you seen this thread. As you can see, results vary though.
- Fri Aug 18, 2023 1:00 pm
- Forum: Specimens, samples and slides
- Topic: Stomates and cellulose acetate butyrate- any experiences?
- Replies: 17
- Views: 5190
Re: Stomates and cellulose acetate butyrate- any experiences?
Congratulations! Nothing as good as getting results when you've worked hard for them (an nothing more frustrating if you don't, but that's not for now ;-)) The trick for me is to use minimal superglue, the thinnest smear of vaseline, to offset the slides as you mentioned- and not to wait an hour. Te...
- Thu Aug 17, 2023 9:17 am
- Forum: Specimens, samples and slides
- Topic: Stomates and cellulose acetate butyrate- any experiences?
- Replies: 17
- Views: 5190
- Wed Aug 16, 2023 11:55 am
- Forum: Specimens, samples and slides
- Topic: Stomates and cellulose acetate butyrate- any experiences?
- Replies: 17
- Views: 5190
Re: Stomates and cellulose acetate butyrate- any experiences?
Nothing technical, really. I repeatedly use the same top slide and take great care not cleaning it. When it gets lost, I take a new one and wipe it off the skin of my nose... That said, there isn't normally much contact between the glue and the upper slide, for the blob of glue is smaller than the p...
- Sat Aug 05, 2023 1:33 pm
- Forum: Specimens, samples and slides
- Topic: Stomates and cellulose acetate butyrate- any experiences?
- Replies: 17
- Views: 5190
Re: Stomates and cellulose acetate butyrate- any experiences?
If I understand you well, you are using a different CyAcr technique than I do. I normally don't peel off the hardened glue. I thourough clean a slide with alcohol. Then I apply a thin film of CyAcr, over 1 to 2 square cm. Than I place the leaf on the glue, followed by a second slide (that as well mi...
- Mon Jul 31, 2023 12:57 pm
- Forum: Specimens, samples and slides
- Topic: Stomates and cellulose acetate butyrate- any experiences?
- Replies: 17
- Views: 5190
Re: Stomates and cellulose acetate butyrate- any experiences?
I have been using cyano-acrylate a lot for this purpose. Mostly it works well, but indument on the leaf is an issue indeed. Also the slow curing times tend to allow the production of air bubbles arising through and getting fixed on top of the stomata. After I had made all these measurements, I also ...
- Mon Jul 31, 2023 12:45 pm
- Forum: Identification help
- Topic: What's this..?
- Replies: 4
- Views: 1463
Re: What's this..?
Judging by the images that popup googling that name, it is likely to be correct.tomt at photomacrography.net wrote: ↑Mon Jul 31, 2023 6:51 amThis is a liverwort of the genus Telaranea. Near impossible to determine species without a lot of other information.
- Sat Jul 01, 2023 10:38 pm
- Forum: Identification help
- Topic: What's this..?
- Replies: 4
- Views: 1463
Re: What's this..?
I can see what made you suggest this. But:
Batrachospermum is a red alga, while this, if it is an alga, would be a green one; morphologically its side branches (for lack of a better term) are highly branched, while in my specimen they are simple; and it lives in water.
Batrachospermum is a red alga, while this, if it is an alga, would be a green one; morphologically its side branches (for lack of a better term) are highly branched, while in my specimen they are simple; and it lives in water.
- Sat Jul 01, 2023 11:06 am
- Forum: Specimens, samples and slides
- Topic: paraffin
- Replies: 4
- Views: 2382
Re: paraffin
Thanks, Alexander, but these offers are about pure paraffin, which I had no trouble finding indeed. Paraffin embedding wax is not pure paraffin, but has additions to facilitate harmonica ribbon formation (e.g. natural rubber, as I came to understand recently). I do not have experience with the embed...
- Fri Jun 30, 2023 6:24 pm
- Forum: Specimens, samples and slides
- Topic: paraffin
- Replies: 4
- Views: 2382
paraffin
My source of chemicals (Magnacol UK) has stopped shipping internationally. Could anyone advise me where to buy paraffin embedding wax suitable for microtoming in Continental Europe, OR provide a recipe for to make it from raw paraffin?
- Thu Jun 29, 2023 7:24 pm
- Forum: Identification help
- Topic: What's this..?
- Replies: 4
- Views: 1463
What's this..?
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. file1.jpg file2.jpg Here and there there are "e...
- Mon May 29, 2023 11:02 am
- Forum: Microscopes and optics
- Topic: What is the optimal combination of 5 objectives?
- Replies: 10
- Views: 3276
Re: What is the optimal combination of 5 objectives?
We're talking nosepieces here, so the profile does come into questionapochronaut wrote: ↑Mon May 29, 2023 12:24 amIs user profile the same as application? User profile sounds a bit overly digitized.
- Sat May 27, 2023 5:20 pm
- Forum: Pictures and Videos
- Topic: radiolaria reversed
- Replies: 12
- Views: 1533
Re: radiolaria reversed
Wonderful! When I was a student, long ago, I cut out pictures like these and glued them to the cupboard door for their beauty. I don't think they were real then, but glass models. When I left that room I had to pay the landlord dearly, for the glue wouldn't come off... The stereo version doesn't wor...
- Sat May 27, 2023 5:15 pm
- Forum: Microscopes and optics
- Topic: What is the optimal combination of 5 objectives?
- Replies: 10
- Views: 3276
Re: What is the optimal combination of 5 objectives?
I bought quintuples a couple of years ago, so now I know what I really want is at least one sextuple :? The optimal combination depends on the user profile. This is what it al boils down to, of course. It's only that subjects so often change and with them the profiles. So, to accomodate as many of t...
- Sat May 27, 2023 4:59 pm
- Forum: Pictures and Videos
- Topic: three spiders
- Replies: 13
- Views: 1748
Re: three spiders
which have a number of advantages over stereo pairs anyway...ADi wrote: ↑Sat May 27, 2023 3:35 pmI can 3D only in red/cyan e.g. radiolarians.
https://www.microbehunter.com/microscop ... =6&t=18410
- Sun May 21, 2023 12:29 pm
- Forum: Miscellaneous
- Topic: measuring RI
- Replies: 3
- Views: 743
Re: measuring RI
If it is a pure liquid, just seek Google. I apologize if that was obvious. No offence taken! :D I'd like to measure a few gels of roughly known composition but in unknown proportions. A procedure for measuring the RI by means of a microscope has been published by Prof G. Rosenfeldt of Hamurg, Germa...
- Sat May 20, 2023 8:09 pm
- Forum: Miscellaneous
- Topic: measuring RI
- Replies: 3
- Views: 743
measuring RI
Is there a simple way of measuring the refractive index of a medium?
- Tue Apr 11, 2023 2:37 pm
- Forum: Miscellaneous
- Topic: Nikon microscopy camera
- Replies: 4
- Views: 2039
Re: Nikon microscopy camera
Isn't that a bit of overkill for non-super-resolution microcopy?
- Tue Apr 11, 2023 2:27 pm
- Forum: Illumination Techniques
- Topic: Optiphot: Centering the epi-illuminator
- Replies: 6
- Views: 2097
SOLVED: Optiphot: Centering the epi-illuminator
The cause was this: in the exit *) of the illuminator sits a black tube that separates the bright field light path from the dark field light path. It has three tiny attachment points which make it vulnerable to breaking, when the illuminator is placed flat on the table top. Mine had come off and I h...
- Mon Apr 10, 2023 9:29 am
- Forum: Microscopy accessories
- Topic: Microtome object holder (Leitz 1212)
- Replies: 15
- Views: 3990
Re: Microtome object holder (Leitz 1212)
Welcome to the Multiverse [or should that be Mulltiverses ?] I am honoured :) BTW, 10mm aluminium tube appears to be a good starting point for the shaft that fits after a minute of polishing. --------------------- C S Minot Nationality: French active 1886-1892, inventor of a microtome, French I tho...
- Sun Apr 09, 2023 6:36 pm
- Forum: Microscopy accessories
- Topic: Microtome object holder (Leitz 1212)
- Replies: 15
- Views: 3990
Re: Microtome object holder (Leitz 1212)
I just found a 10.0 mm diameter rod that fits and sits tightly clamped. The 9.9mm drill sat too loose, a 10.3mm wooden rod was too wide. Its a hard steel rod that I can neither saw nor attach to a disk. But now I know what to look for. So a plain shank indeed, and existing holders other than Leitz s...
- Sat Apr 08, 2023 10:07 am
- Forum: Microscopy accessories
- Topic: Microtome object holder (Leitz 1212)
- Replies: 15
- Views: 3990
Re: Microtome object holder (Leitz 1212)
Yes, it will suffice if you are melting wax blocks onto it … but if you are cutting more ‘robust’ specimens, the vice can be useful. … I have a Reichert-Jung 1120 which needs a lot of tidying-up: Here’s a snapshot of the vice: ... If it’s any help, I could provide some dimensions. MichaelG. Underst...
- Sat Apr 08, 2023 9:53 am
- Forum: Microscopy accessories
- Topic: Microtome object holder (Leitz 1212)
- Replies: 15
- Views: 3990
Re: Microtome object holder (Leitz 1212)
Excellent! Thanks!MichaelG. wrote: ↑Fri Apr 07, 2023 8:51 pmThis is [obviously] not specific to your instrument, but it’s a very useful reference document:
http://users.stlcc.edu/Departments/fvbi ... r_Care.pdf
MichaelG.