MicrobeHunter.com Microscopy Forum

Metric - imperial conversion: My metric lathe has a 63 tooth gear. 63 is close to the half of 127 which is half of 254. A 63 or 127 tooth gear might help in your case too, Rick. There are computer programs to calculate gear settings based on what gears you have available. The sometimes come to many ...

Hi Michael, I'm not sure what kind of material his India rubber was actually. It might have been an early hard rubber or soft rubber like bicyle inner tubes. The traditional red soft rubber had a tendency to stick to certain things but I don't know the mechanism behind this. I'm quite happy to have ...

Tame compared with what their wives say..... :evil: I'm afraid if I quoted what my wife said, I'd be banned from the forum ;-)[/quote] The microscopists big distant goal has to be to get his wife interested in microscopy! Around 1960 is was absolutely common that the meetings of our microscopy grou...

The book was written in the late 1800s and very few of the man made substances of today were known then. Henry Scherren must have been comparatively well off to be able to afford equipment, travel expenses and instruments and have free time available for pond collecting. Today it is not uncommon to ...

Hi together, when preparing the December meeting of our microscopy group about artificial ecosystems I came upon a nice old book that is still helpful to read today: Henry Scherren: Ponds and Rock Pools. Our group celleague Georg Rosenfeldt has put this book in a new layout to make it better to read...

Hi William, you bought a very nice microscope there! It is equipped with a lot of very special components for fluorescence, DIC and phase but he question is whether one or more of these setups are complete as it stands there. You might only have a very good start to a fully equipped research microsc...

Welcome to the forum,
there have been a couple of microscope selection threads just recently. Have a look, you will find lots of good advice there!

Bob

Hi John,
interesting sections with the lateral root and the splitting root!
Have you tried Etzold FSA or FCA or Wacker W3A triple stains? They are quite popular here in Germany.

Bob

Hi John,
thank you for showing! Did you make the section free hand?

Bob

Hi Phil, I don't have an explanation for the unexpected behaviour of the Leitz objective. The only thing I can imagine is that the front element might have been exchanged for an other one. The front lens of a fixed oil immersion objective is easily damaged and someone might have screwed something el...

This microscope was obscenely expensive when new but it is equaly unattractive for the user and most collectors today. So I think it will be the best to describe it precisely with all it's accessories (inscriptions and part numbers and condition) and list it on ebay. Since there is only one person e...

It is fairly easy to get a good microscope image on a full- HD screen. So it would be an idea to let the kids gain some practical experience with their microscopes with standard equipment and then demonstrate the few details where a 100:1 oil is needed on the teachers demonstration microscope. If th...

5-seat nosepieces from the Zeiss Jena LG, NG and NF (black) fit perfectly. Nosepieces from the Zeiss Jena Amplival-series ( beige) are just slightly higher, no practical problem. On german ebay these nosepieces cost about 25€ each.

Bob

Of the simple achromats the 100:1 is by far the most difficult to make. The Chinese can get this right but they have a tendency to get far easier things wrong so I wouldn't like to play quality control for them. Do the condensers have an adequate n.a.? In use I see these challenges to be mastered: T...

Hi Chris, it is no wonder that nobody has answered your question on PM - it is difficult to make out what you really want. I will try it. "My" secondary school doesn't have any objectives over 40x/0.65, which isn't enough to look at chromosomes etc. Why, the chromosomes in onion tips can be seen wit...

To get started you can just cut a CD cover in stripes and use transparent adhesive film (In Germany: TESA-Film) as the cover slip. For low power objectives this is very acceptable.

Bob

This is quite a good combination: You as an adult microscopy newbie and your children! A good children microscopy book is this: https://www.amazon.com/World-Microscope-Chris-Oxlade/dp/143523720X If you are interested in micro meteorites there is now way around Jon Larsens book: https://www.amazon.co...

This is always the problem with used microscopes - some are uncomplete, some have defects, some just need maintenance and some are not right for the buyer's needs. On the other hand side you get a quality instrument for a modest sum and of stable value. A compound microscope is mostly used between 1...

Don't worry, microscope technique is a wide and difficult field, but you don't have to be an expert to start working with the microscope. Your lamp base probably had a lamp socket when new, that places the filament in the right spot. They tend to get lost when power supply and microscope are separat...

RMS eyepiece tubes have 23mm diameter so the maximum field size is about 20mm. This can be fully used with a 10x eyepiece, so a 6x 20mm eyepiece shows the same 20mm field with less magnification so the image just looks smaller and covers a smaller angle of view. If I were to equip this nice microsco...

Hi Konrad, I can't help with the identification but I can recommend a useful book: "Das Leben im Wassertropfen". For the amateur it offers a useful package of information on freshwater life. You don't need to buy the newest edition, a 10-15 year old one is easily good enough. Your video quality is v...

Nice combination, and much better looking than Frankenstein's monster! I think I have the Lomo microscope your trino came from - my one was exchanged for a Zeiss Jena trino and the stand painted black. Are your objectives parfocal with this setup? Your stronger objectives wil probably give a better ...

This can be overcome by using a Leitz or PZO condenser with the same mount. Bob PZO condenser is 2mm wider than Zeiss/lomo This was a Zeiss West Standard Junior microscope with 39,5mm condenser diameter. I use one with either a PZO or Leitz (Laborlux SM) condenser, both 39,5mm but different optical...

Hi together, there is a cheap Lomo field microscope on ebay: https://www.ebay.de/itm/Lomo-MBD-1-Mikroskop-microscope-mit-Objektiven-und-Okularen-in-Koffer-case/312451731755 I would expect to have to relubricate it for optimal movement but this has to be expected with most older microscopes. This is ...

With PZO you had one of the famous microscope manufacturers in you country! They made some very ingenious designs and had a good mechanical production quality. I don't know whether they made a hand microtome though. In the DDR there was a hand microtome named OPTIMAT on the market. It has no clamp, ...

Ah, ok, now I understand! The blade holder is a bit safer to use but the main advantage is that the blade never touches the table surface and the edge stays sharp. Especially when cutting into a full diameter carrot block the single phased blade is pulled down hard onto the table and into the openin...

Hi Doron, I can't remember what you exactly wrote before. :oops: What I meant was this video: https://www.youtube.com/watch?v=OoSJWpwYJVY After minute 6:30 Oliver cuts and his carrot just turns a couple of degrees. So this is not yet tight enough for the job, but I'm sure that there will be a good w...

Hi Doron, I have seen Olivers video, but the method didn't quite work: The carrot block canted upwards and the object wasn' t kept stable. So the punch would have to make a bigger, tighter fitting carrot block. One Problem with carrot is that the lead sap that rots in the microtome, the other is tha...

Hi Doron, I have a GFL but I can't really remember how I got on with the condenser. What I found was that different microscopes and condensers are not the same when it comes to dark field/COL/oblique stop use. With a Lomo Abbe condenser and filter holder directly below it works fine. With a Zeiss Je...

Most forums with image hosting have limitations to the size and file size of the images per file and per post. When you upload a big image here you will be informed about the limitations. :lol: You might have to post just 4 images, start a reply and post the next 4 and so on. Irfan View allows to re...