MicrobeHunter.com Microscopy Forum

" are there any metallurgical scopes out there that can be had for a more beginner-friendly price?" Radical seem to sell some... albeit this one has only two objectives: Radical metallic.jpg (I am tempted to buy a set of their metallic objectives to go on an old (pre coatings era) metallic as the ba...

What a lot of fun.... and it looks like it works !! Out of interest; what does the 'HI' stand for on the objective ...is it homogeneous immersion or just a model of objective? You mentioned an LED ring light and I wonder if 'Colonel Woodward's' ball-type oblique illuminator mounting might somehow wo...

Sansub... that is a really nice range of background colours and the colours of the internal granules are really nice too! -Did you have the two 3d cinema lenses arranged with their 'fronts' facing each other ??? This polarisation stuff makes no sense to me, yet again ... I didnt previosuly try putti...

Some holes punched around the edge of a coloured gel should illuminate the foreground with white light and give the background a coloured hue: Milk bottletop unstained wood.jpg That was taken using a filter made from a milk bottle top ( the holes were made with hole-punch pliers): Bottle top tinted ...

A fogging can build up inside glass surfaces of the eyepeice, it doesnt take much of this to soften and ruin the view. It can be cleaned off. A good way to check is to stick the eyepiece on a mobile phone light : (This one also has dust on the outside surface) Old eyepiece on phone light.jpg There a...

It looks like there might be some of the epi light coming back up the through condenser ???
I guess something like a coin bit of carboard might be a check of that.
Not that they are bad images

To be honest, I think that your foil-with-a-hole works pretty well. It seems that the illuminators with the half-silvered mirrors are the ones where the light comes straight through the axis of the microscope and the user is viewing at right angles to this axis ..e.g. the Baker inverted metallic: ht...

Here is an interactive chart of the colours for the tape between crossed polarisers: https://micro.magnet.fsu.edu/primer/java/polarizedlight/michellevy/index.html Moving the mouse pointer across the chart I come up with, very roughly (bearing in mind I might not have been holding the slide at 45 deg...

I know it sounds daft...but have you tried a coverslip ?

Watch glasses !!!
Thank you so much
Only a day ago I was, out of frustration, punching holes in a 2 litre milk bottle top just because there was a 32mm diameter ring ready-marked on the inside of it

This seems a helpful article : https://charteredengineerspacific.ca/images/2018_events/20180516_Compensated_Polarized_Light_Microscopy.pdf But I dont think that my modern generic tape is as powerful as the cellophane tape in this article [ 1974 ]... unless of course I still misunderstand ! :-) :-)! ...

Some nice pics
The:
80 images stacked.
AO10, 20/.50 Cat.1022

...Seems really good
Have you found a new/special way to sharpen the images ????

Microbob... Until I came across the 'dehaze' tool in RawTherapee a lot of my focus stacks looked bad /too much mist ! I only found it a week ago. -For others: it processes Jpegs (as well as RAW) and it is free :-) I find that that having the 'luminance only' box ticked , in the filter, seems to work...

Definitely a nice new profile picture ! :-) I have found some things out: a]Even the thin (0.3mm) polarising film is sandwiched between protective layers.(I attacked it with some sandpaper !) b] Sticky tape makes a good (stronger) twisting material than my cellophane sheets. Getting the same orienta...

Hi josmann.. I dont even begin to understand this polarisation stuff.. but (very roughly) are you making rheinberg filters that have different orientations of the film in different sectors?
(This cellophane looks to be around 0.02mm thick).

-Bram... Is glimmer a derivation of glamour, maybe ? ?

A bit late in the day, this ! But I had read that cellophane .. the material that flowers etc are wrapped up in (and cellotape but that has the horrible gum on the back) works to somehow twist different colours, different amounts. I thought one day when I go past the florists I will get some ..but I...

The Ealing objectives seem to be the same as the Beck ones (from England UK ). Beck did a lot of metallic kit. I dont think that they got involved in infinity optics.
The Beck Epimax microscope seems to be of the same period as this style of objective.

1] Yes, it is a bit like being trapped in a broom cupboard with whatever you are looking at. 2] Definitely no spectacles .. the diameter of the glass on the top of the Watson x20 is ~5mm I think that you are being a bit tight re. N.A.s of 20x objectives for the 20x 20x solution/ approach that was su...

Hobbyst46, sorry I should have explained a bit better, I use either either a seperate illuminator (like this one https://www.quekett.org/resources/kohler) or an LED light panel... so the mirror I am talking about is the one underneath the condenser. On quite a few microscopes with Kohler illuminatio...

I am guessing that the relief effect in the above pics comes from using divergent light (fully open condenser lowered below focus of an LED light panel). -It seems easier to adjust the lighting with the concave side of the mirror than with the flat side. One potential benefit compared to the results...

Yes, getting one of these might just trigger a blue-flash event
Which doesn't mean to say that I haven't just spent the past hour looking at folded microscopes of one sort or another ..I quite fancy the TWX-1:
https://www.microscope-antiques.com/twxviews.html

This discussion has been really useful for me, I hadn't previously considered what objectives give the effect and why ! I also tried direct projection using a camera body (without my usual lens-less adapter ) and for some reason I also put a set extension tubes on the front of the camera and mounted...

Nice
Is the darkfield created using the Lomo reflective-type condenser?

Not quite what you are looking for, but interesting all the same...I guess it needs pretty good dehydration....perhaps you could inject it? : https://www.etsy.com/uk/listing/941008237/green-chafer-beetle-in-lucite-resin?click_key=0a320c50bb62314c0f89e197e5f463b3b486d310%3A941008237&click_sum=9ae3f17...

victhree, if you do pluck up the courage to take off the angled head, I think others will be interested to know what is underneath (mirror, prism?) :-) ..well I would be, if no-one else! (It is also a good opportunity to see if these optics have a bit of fog). Good luck with the polarisation .. some...

If there is water between the stage and the slide ..the two things can get a bit 'sucked' together (then best not to use the clips at all). generally I put my thumb on the stage and tweak the slide with the nail. If you are trying to scan the whole slide area quickly to find 'something' then a mecha...

Are you using stage clips? ...often one stage clip is better than two.

There are all sorts of grades of complication ;-) .. there is no need to take the head off your microscope, if you dont want (but it is a sensible place for a filter to go..before the extra glass of the prism and the eyepiece). Simplest; (if you have a dry mounted 'something'): One filter directly u...

Circular polarising filters, like the cinema spectacle filters, are linear polarising filters with a 'twisting' layer on the front. The cinema spectacles have the linear filter on the eyeball side ... so if you have two filters out of cinema specs and put them eyeball-side facing eyeball-side ( a bi...

Just thinking about Diatom lab 'holding onto their coconuts': perhaps they were using some variant of a 'solid immersion objective'? :
https://www.biorxiv.org/content/10.1101/373647v1.full