MicrobeHunter.com Microscopy Forum

Interesting but. Firstly the centre of each vac stop need to be a different sizes for each objective. This depends on your objectives and their NAs. Greater NA bigger the central stop. Try something less than 10mm for lower powers first. A 40x objective might need near to a 19mm central stop which i...

sorry folks i am struggling with the picture sizing.
the gall former Biorhiza is the one in black and white
Hopefully you get the idea
I will post a picture of a gall mite when i work out what size i can get away with

this year i have taken an interest in gall wasps and gall mites. Gall mites may be the only invertebrate to have four legs in their adult form. these wasps are from the oak apple gall. Go and look at oak trees at this time of the year for other galls. You may have to keep other sorts till the ssprin...

I too have versions with frosted and clear glass in the collector lens. Whilst we are on the subject of AO illumination. Having acquired mine from the US without power for their halogen lamps - and as previously trailed - some pictures of the LED conversion. This is sufficient to power all technique...

Try putting the bee in some water and vinegar for a few days
You might find an intersting payload of mites fall off it to the bottom of the container
The mites use the bee for transportation rather than being parasites - although thry do live innthr bees nests

You could try shining a pencil beam led torch BACK through the light path of the microscope to see where it arrives at the light source. That will give you the xy position. You would need to take the bino head off. Then put a bit of semi opaque paper or plastic sheet on the light well beneath the st...

I know some will baulk but i quite often wash dusty bits if they are detachable. i use a dilute solution of a non residue leaving detergent made by bilt and hamber for cars of some squirty hand soap and rinse copiously under the tap. difficult but not impossible for eyepieces and light port glass, c...

Sarah
I attach a picture of a house dust mite
I sometimes find them crawling along the sides of microscope slides i have made using fructose or pva. An easy way to catch them
there are other mites about your house - flour mites, cheese mites....

I see 8 legs in your first video. If it has very long hairs on its back probably a housedust mite

I have a grey zetopan which sees little use. The zetopan parts scene is a little expensive/ridiculous for me. It is in working condition mechanically. The condenser is the high NA one useless for most tasks unless the top lens is unscrewed. For a scope made mostly of depleted uranium i was astounded...

It is one of a genus of microturbelarian

I have done a number of led conversions on AO 20s, a zetopan, a vickers patholette, a b&l dynoptic, an old leitz ortholux and recently an old leitz Labolux. I am baffled by the complicated efforts people are going to. All you need is your 3w star led, a penny washer (copper or aluminium), some therm...

i performed this experiment last night. I placed a piece of slightly opaque plastic film over the end of the trinocular tube - where then camera would screw onto the c-mount thread. by turning up the microscope lighting and darkening the room i could then see the image projected up the tube from a s...

Ii am intrigued by this business of relay lenses. If the eye ball is placed at the point of focus just above the eyepiece why does this not work for a naked camera sensor? Because the eye has a further lens arrangement that expands the image onto the retina?. With a relay lens sitting down inside a ...

When my ancient hp laptop died the tucsen camera i had been using refused to run on the new computer at anything other than a low resolution/low frame rate. There was also strobing. Not sure if camera is kaput or too old for the NUC 10th gen i5 chip. Anyway too frightened to spend on a more modern u...

I have now attached a sony alpha 5000 to the trinocular tube using an e mount to c mount adaptor. The thread on the tube gets a bit close to the sensor. the only things between the camera sensor and the thing on the slide is the objective and the telan lens in the head of the AO20 - an infinity scop...

A venerable A020 with trinocular head and a genuine phototube which made the view on the computer monitor screen acceptably parfocal. (I have also gimmicked up a phototube using an AO adjustable eyepiece holder from an old head. It wedges into the trinocular port. I have a clamp on c mount thread th...

Apo I see this is a long ago post. My tucsen camera refuses to work with my new pc and this has put me off buying a more recent c mount usb camera. I was fancying an alpha 5000 as a replacement. The tucsen screwed directly onto the c mount thread of the ao phototube and was parfocal. I am almost afr...

Thank you all The NUc is the latest 10th gen i5 chip running windows 10. The camera worked ok on the old laptop under windows 10. I only have a keyboard and mouse plugged in. All 3 usb ports are 3.1 spec. I will try the power settings Toupview gets good reports. It couldnt recognise the camera when ...

my ancient HP laptop recently expired and i replaced it with an intel NUC of much higher specs and a decent monitor. 16meg ram 10th gen i5 processor up until then i had been using a 5meg TUCSEN is500 c mount camera which performed ok - i have nothing to compare it to. on installation to the NUC i lo...

I have had some success fitting the later 110 condenser holders onto series 20 scopes. Indeed you can get the whole stage from a 110 onto the AO 20 dovetail. It may be due to wear in the varous parts or lucky alignments as somtimes the condenser holders are a bit tight. You can also fit the AO 20 ho...

look out for the sale of most of its carcase

Thanks apo Yes it has the lux light box although without a functioning lamp or power source. I have gimmicked up an LED to see how things work. The objectives were a mix. A couple of phase and a couple of planachros. Sadly as you surmise no phase condenser. I find unscrewing the top lens of the cond...

I acquired a Zetopan before christmas. Appears to be made of depleted uranium. Sadly it came with the 1.3 na condenser and a mixture of objectives. I sold the anoptral phase ones and made back the money i spent on the scope. I find the ergonomics a bit old fashioned. You need long arms to adjust the...

Looks like a variety of oscillatoria, a cyanobacterium, the so called blue-green algae although this one obviously is not that blue or green

Charlie
Here is a picture from a slide i made of a tardigrade. You can see the apparatus it uses to feed and just about make out the leg muscles

Ross

As an "eastern bloc" microscope would this share fitting sizes with the likes of lomo? Or zeiss jena? That would open up possibilities objectives and equipment wise

That looks like a microturbellian - which is like a very small planarian(flatworm). The shiny edge around it is a line of cilia that move it about. Either it has eaten a lot of algae - and they have big mouths on their underside - or it has green symbiotic algae

I think you will find the body cavity cells of euardigrades (the unarmoured variety that you have pictures of) move passively in the body fluids as the animal moves about. They are metabolically very active. There may be about 200 in each animal. They are also known as coelomocytes and are used to s...

I have a method called varable amplitude contrast (VAC) working and it compares very, very favourably with DIC although it works in a different way. It involves 3 pieces of polarised film. 2 are arranged to make a stops for each objective (this is the hardest part to make) which are fitted into a ph...