MicrobeHunter.com Microscopy Forum

I would be very, very interested to see a comparison of the 'Amscope on a tube' setup (when it arrives) against these. There is also a bit of a philosphical question; 'how good an image does one need'? -A bit like: 'How much money do you need to invest to make an enjoyable cup of coffee ?'! Thank yo...

Frank, nice to see how it is developing ! I did try an Amscope plan 4x (finite) against my 4x Nikon (finite) on a 55mm tube and I couldnt see any difference in the end quality of the stacked image. My knowledge of infinite stuff is next to zero... but getting a tight coupling between the specimen an...

Ok, so it's better to take a 10x objective Frank, sorry, I didnt explain it very well. With absolutely no extension-tube, the 4x objective gives 1:1 ( which I dont think you would use). I get on OK with about 55mm of extension tube which gives about 3:1 Wait till yours arrives and you have had a go...

I will first do some tests with a finished basic 185 mm lens bought 18 euros on XXXXXX.com with an RMS to T2 adapter (T2=42 mm x 0.75 mm) That is the right approach! Some of the 'no-name' 4x's can be good, ( See the one on the site that MichealG linked to) In fact I dug out a Chinese plan 4x and in...

Here is the view ( a stack) from a 4x Nikon mounted directly onto the front of an APSC Canon (600D) but with a 12mm extension tube slice: Leaf back 12mm extesion tube Nikon 4x.jpg The width of the view is a about 17mm, the working distance is about 4.5cm This is the Nikon 4x : https://www.edmundopti...

Frank, have you tried mounting an objective from your Bresser Infinity onto the front of your camera lens? The camera lens might not have enough focal length, but it could be worth a go . (The RMS adapter discs are not expensive and are usefull things) https://www.photomacrography.net/forum/viewtopi...

I really enjoyed these
The cuts are very nice.
I learn new botanical terms every time you do a post !

Amazon & ebay have them too. They look like this, closed up : feeler guage closed up.jpg They look like this when all of the feelers are unfolded (but generally you would only fold out the the feeler that you wanted to use): feeler guage opened up.jpg They were used for setting the gap in the contac...

A suggestion; It might be worthwhile (before attempting to take the thing apart) to slide a thin feeler-guage into ( and around) the gap between the 'knurled end ring' and the 'inner optics barrel' to make sure that the two arent locked together by hardened immersion oil. If they are locked together...

OK, this is a very long shot ; you could try a drop or two of Type A immersion oil (the thin stuff) ? I have just tried some on a hard-to-undo screw top of a Cedarwood immersion oil bottle and it stopped the 'heavy dragging'. I guess it might take a week or two to soften dried immersion oil. The old...

Cigarette lighter fluid is for wick-based lighters, its a liquid* rather than a compressed gas. one MSDS I have seen says C7 to C9 alkanes ..so heptane to nonane. It might not be the ideal solvent for hardened immersion oil, but it is very good for freeing stuck threads and re-fluidising dried/harde...

I love old resources like this In the UK, on ebay, there are USB drives e.g. "220 Rare Vintage Microscope Books on USB Histology Microscopy Slides Science F5" I dont have this particular USB but a few years ago I bought a similar one and it still keeps me entertained! Curiously there some other col...

I wonder if some of the effect comes from light reflected downwards (say from the coverslip) and becuase of the polarisation this becomes a bit directional (?)
Is this something a bit similar?; (right hand page half way down):
https://archive.org/details/microscope0 ... 0/mode/2up

1] I imagine it to be a specimen flow chamber. 3] I dont think that I have seen any reference to a commercial darkfield condenser that operated through coverslip-thickness glass, though one might imagine that the thinner the slide and the wider the top element of the condenser the higher the NA that...

Here is the Baker Ultra Condenser: food for thought?

I wonder if NOT using a conventional slide but a coverslip might push the NA of the condenser past 1.4 There seems to have been quite an effort to push darkfield condensers and some were used with thin slides ; the R&J Beck NA 1.25-1.37 is used with ~0.5mm slides (well it says "with .02 slips" ). P...

Here is a bit on ultramicroscopy and its application in studying colloids, by Zsigmondy :
https://www.nobelprize.org/uploads/2017 ... ecture.pdf

Here is his wikipedia entry: https://en.wikipedia.org/wiki/Richard_Adolf_Zsigmondy

It is interesting that such things are getting possible :-) How many examples of each does the AI seem to need, do you feel? MichelG, I think, posted a link to this site a while ago (but diatoms) and it made we wonder if it might be AI fodder: https://naturalhistory.museumwales.ac.uk/diatoms/taxalis...

I hadnt thought about this before, but the closer the centres of the two images, the less ones eyes need to converge; so the half-sized pair below might be easier:

To see the stereo in side by side images the level of eye-crossing required is not much different to reading a book or looking at the screen of a mobile phone, 8 or 10 inches from your nose. (it is not the bonkers eye-crossing of the school playground). Berezin test image.jpg Hold your mobile phone ...

ADi, please dont delete anything... I like to to see (other peoples!) stacking artefacts. The only thing that bothers me is that your images are jolly nearly an order of magnitude sharper than mine :lol: (This doesnt honestly-speaking bother me as I really enjoy stacking and the view that I get at t...

Really nice! - what were the stains ?

Alexander, I am very curious to know what sort of things can be wrong with the handheld microtomes from China/India ?
(I have only cut a few stems with a hobby knife much like one might cut spring onions .. so 'in my imagination' I was thinking that a chinese microtome might be a step up!).
Thanks.

Really interesting; Do you think that the LCD was a newish design/liquid? I ask as I saw some polarised-light photos of liquid crystals from years ago, that looked very different. A bit of a search came up with this site : http://lcmicroscopy.weebly.com/lc-photogallery.html -Do you think that the st...

Very nice photos, the texture of the wing is interesting to see.
I had no idea what a samara was .. a winged achene... and now I am (again) trying to understand what an 'achene' is

Smurf, I am curious to know if you found any objectives? I did see an adapter that goes from 15.2mm male to 20.2 female, but maybe that is not the exact size needed to be be able to put a short length (ie old design) RMS objective on the nose? : https://www.aliexpress.com/item/32980282842.html#nav-r...

The oil darkfield photographs dont look so different to the those taken using your home made stop.
What was your impression when you were looking through the microscope?
(Was the oil darkfield condenser a Watson Zonal or some other?).

Yes, thank you for this thread; the quest for a compact 'seaside' microscope never seems to end. It is a clever design, though the couple of simple scopes that I have come across with a top knob fine-focus are spring pressured upwards , so that sort of rules out sticking a DSLR on the end. I notice ...

Macnmotion, thank you for posting these videos; I find them quite surprising.
Just to check; are these filmed at normal speed or is the video sped up ?

This arrived in the post .....with some fuse-wire as a spacer