MicrobeHunter.com Microscopy Forum

The field aperture diaphragm is positioned directly above a first surface, 45 degrees mirror. In a camera lens the problem is there too but in practice it is less likely to show because the camera lens is used in the horizontal plane most of the time. With an analog camera you even had a new image ...

Hi Doron, I have a camera repair handbook that shows general techniques and special methods for camera of the 1970s and 80s, written by camera repairman Tomosy. The process you describe here is one of his standard methods to get a stuck aperture or leaf shutter going. After cleaning he applies light...

Hi Tim, don't use WD40, Pete is exactly right about the proper uses of it. With heating a microscope objective I would also be very careful to avoid damaging cemented lens groups. 40°C shouldn't be a problem, so you might carry it in the trouser pocket in an objective container and move it from time...

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Hi together, I don't collect microscopes but there a few collectible microscope types I'm interested in as much that I actually would buy one. One was a well equiped research microscope from around WW 1. I haven't really looked for one and thus it had to come to me: A Zeiss Big Resaerch Microscope f...

A way to improvise rubber eye cups is to pull a piece of bicycle inner tubing over them. Then turn the bicycle inner tube over itself and back over the eyepiece. This way you get a broader rounded edge towards the eyes.

Bob

On ebay you can find 12V LED-rings of different diameters for very little money. They are bright enough for low magnification work and are just 5mm thick. They sell under the name "angel eye".

Bob

Acceptable prices for equipment can vary a lot depending on the condition and the likelyhood of it being complete and running. To expect the sum of top prices for each part for a heap of stuff is not realistic. The only real problem with this is that these never-selling offers bloat the listings of ...

Hi demirci,
permanent marker can be removed with ethanol. Some components of it might have sunk into the paint and a shadow of the number might remain.

With which name can we call you?

Bob

Were there not also periplan eyepieces for the later 37mm optics? During the course of selecting eyepieces for my field microscope( all 37mm optics) I found an older set of 10X periplan that provide excellent corrections and a remarkably flat field to an 18mm f.o.v. They look like this and are quit...

apochronaut wrote:I'll get around to posting about this eventually but that's where I am at.

Hi Phil, take your time, but I'm looking forward to this!
Field microscopes are really an interesting topic and since there is little availabe new it is also rewarding to build something by yourself.

Bob

Hi Bryan, I think your assumptions are right. Traditionaly without any calculation tricks the lower power objectives gave an image without much colour error and the higher power achromats and most apos needed a colour correction by the eyepieces. This still seems to be the case for your instrument. ...

microscopy wrote:Been having trouble finding buyers for used microscopy equipment

At the price you ask for this is very understandable.

Hi Bryan, the "B" designation was dropped at some point when bino tubes increased in market share. When looking for new components it is important to know that Leitz made acouple od system changes: - 1. 37mm objectives, 170mm tube, eyepiece pickup point 18mm inside the tube - 2. 45mm objectives, 170...

Hi Tim, when it first moves fine and then stiffens up there might be some old lubricant somehere that is dissolved over time and then slows dom the mechanism again. You might have to look more closely for old lubricants. Stages often have big sliding surfaces and don't like to move easily with greas...

Hi Pat, you've got a nice microscope there! With no optical surfaces between objective and eye it could actally offer a superior image to more modern microscopes. These horseshoe microscopes vary quite a bit in weight, I have a ROW mircroscope from the DDR and it is a true boat anchor, much heavier ...

Hi John,
from look alone the closest to these mysterious objects I know are closterium desmidacae - probably not a valid identification.
I had a look through my biology books but didn't get any further.

Bob

Hi John,
this should be a forsythia.

I also have started to look at buds and think about what to do with them.
They might be a suitable victim for my glycerin soap embedding tests.

Bob

Hi Matvej, the Kleinmikroskop B is nice to take it to the holiday trip but as a desk microscope it is a bit limited and fiddly. But keep it! For your purpose it would be good to have a good but not too expensive setup consisting of a stereo microscope and a biological microscope. With biological mic...

Hi, welcome aboard! I'm sure that you will find a lot of information about microscope technique in this forum. What instrument from east Germany do you have? Many of them are quite good and it may only need some cleaning and maintenance. Lomo is a russian microscope maker that has made a lot of good...

Hi Peter, this is the advantage of buying a used quality microscope and refurbishing it yourself - you save a lot of money. If you want to buy acessories for a used microscope you might have to wait a while but when it turn up you will be able to afford it. Make sure to be seated well when you look ...

Hi together,
I think this is the diatom mountant to buy today: https://diatoms.nl/index.php?seo_path=p ... m-mountant

The Pleurax I use was made by Georg Rosenfeldt and another colleague from our group. It is darker in colour but really nice to use.

Bob

Hi Peter, I think basic light microscopes have not been developed much further in these decades - they are just not at the pinnacle of research any more. From my point of view the development has mainly been in production cost and ease of use for not so well informed users. The Ergaval was a basic q...

Hi Bogdan,
may be a bit shorter texts combined with a more fluid movement of the stage will do the job.
Apart from that the video is great!

Bob

Hi Konrad,
what apertures do the objectives have and what type of condenser are you using?
For high n.a. dark field you need a special oil immersion cardioid dark field condenser and it has to fit the thickness of the slide.

Bob

Hi together, there is a thread in the german Mikroskopie-forum.de that is about a similar camera as Rick's: https://www.mikroskopie-forum.de/index.php?topic=33588.0 The problem is not yet solved, but the gathered information is quite interesting. The banding at high illumination is experienced too a...

Hi Bogdan,
thank you for showing!
I got a bit dizzy when watching the video when reading the text while a sudden movement occured. May be the text would be more useful on intermediate text frames befor the video continues.

Bob

Hi Phil, thank you for describing the repair! This is really a beautiful old objective with the nice stained paint on the brass and the convex knurl. It's a pity that these convex knurls are not used any more - beautiful and nice to touch. I have a first series Leitz Planapo 100 objective with the s...

You might make a slide from fixated and stained bacteria and show it at high magnification. The light microscope won't show more than the shape though. I once had a look at slides from human bacterial diseases and can remember that the different bacteria arranged themselved in very different ways. Bob

Hi Radazz, impressive instrument! I have an ancestor of it:The Olympus CK. Compared to your microscope it is a very basic instrument, like a wheel barrow compared to a car! :lol: I haven't really used it so far, so I have no practical experience with it. What objects do you observe and how do you pl...