Search found 3154 matches
- Wed Mar 16, 2022 8:12 pm
- Forum: My microscope
- Topic: Zeiss L + Epignost, year 1920
- Replies: 14
- Views: 3681
Re: Zeiss L + Epignost, year 1920
Epi illuminated photo of what? Very nice!
- Wed Mar 16, 2022 7:27 pm
- Forum: My microscope
- Topic: Zeiss L + Epignost, year 1920
- Replies: 14
- Views: 3681
Re: Zeiss L + Epignost, year 1920
Hi, nice to see you have it up and running! I have an LG and the serial number is on the side of the focus block. In the linked Zeiss Jena document the serial number is at the same place. My Zeiss "Großes Forschungsmikroskop" was made in 1911. I would think that your Lu is quite a big step ahead in ...
- Tue Mar 15, 2022 6:41 pm
- Forum: My microscope
- Topic: LOMO MƂP-1
- Replies: 44
- Views: 10695
Re: LOMO MƂP-1
A true Köhler setup projects the rectangular filament in the image plane, slightly defocussed. But many microscopes don't have a true Köhler setup, they use a frosted lens in the light path as the light source, it doesn't matter much how it is illuminated from behind as long as it is evenly illumina...
- Tue Mar 15, 2022 4:18 pm
- Forum: My microscope
- Topic: Zeiss L + Epignost, year 1920
- Replies: 14
- Views: 3681
Re: Zeiss L + Epignost, year 1920
Congratulations, a very nice and fairly rare Instrument! It looks nearly like the much much more common LG but has the research instument type detatchable stage. It looks as if you also have the epi attatchment, this would be valuable as it is the main advantage over the LG and justifies to claim mo...
- Mon Mar 14, 2022 9:39 am
- Forum: Specimens, samples and slides
- Topic: How to clean old slides?
- Replies: 4
- Views: 1753
Re: How to clean old slides?
The hydrolysis resistance of slides glass is low. They attract humidity and the surface is damaged permanently. This can happen quite fast and hits mostly unused sildes closely packed in boxes, not prepared slides in boxes where they are held apart from each other. They can't be cleaned unfortunately.
- Sat Mar 12, 2022 8:46 pm
- Forum: Beginner's corner
- Topic: How to store solutions for slide preparation
- Replies: 17
- Views: 3599
Re: How to store solutions for slide preparation
The cast aluminium cooking pot is my paraffin oven. It sits on top of a heat plate, air is circulated to increase melting speed without the paraffin getting too hot. The bottom of the pot was a little hollow so I coated it with a layer of heat resistant silicone. Around the pot there is Armaflex for...
- Sat Mar 12, 2022 6:50 pm
- Forum: My microscope
- Topic: LOMO MƂP-1
- Replies: 44
- Views: 10695
Re: LOMO Mbp-1
Of cause it is not only a question of power but also on how well it is used. If much of the light never reaches the specimen the light is wasted. In case a complete illuminator is available it makes sense to study how the light is transmitted and which size the filament has.
- Sat Mar 12, 2022 6:45 pm
- Forum: Beginner's corner
- Topic: How to store solutions for slide preparation
- Replies: 17
- Views: 3599
Re: How to store solutions for slide preparation
I have bought 53ml marmelade jars on ebay. The lid is metal and the jar glass and these are practically diffusion proof. But the seal is soft plastic and can of cause let a little diffusion out and can deteriorate depending on the type of solvents. Real chemical jars would be best but I prefer the t...
- Sat Mar 12, 2022 4:27 pm
- Forum: My microscope
- Topic: LOMO MƂP-1
- Replies: 44
- Views: 10695
Re: LOMO Mbp-1
I like the Cree XM-L2 10W and XHP 50 12V 36W LEDs. For basic bright field work 1W would be enough.For high power dark field 10W LED power is barly acceptable. I power them with a lab power supply that can supply at least 2A. For extended use at high power it is better to use stronger power supply. W...
- Sat Mar 12, 2022 4:12 pm
- Forum: Beginner's corner
- Topic: How to store solutions for slide preparation
- Replies: 17
- Views: 3599
Re: How to store solutions for slide preparation
Hi, I use slide transport containers in a holder. The lids have openings which I plug with plugs 3D-printed from PETG. For de-waxing and the alcohol ladder down to water I put two slides at a time, same orientation, in these containers and close the lid. To control the fluid level I mark the right l...
- Sat Mar 12, 2022 8:13 am
- Forum: Specimens, samples and slides
- Topic: Plankton Net Reviews & Discussion
- Replies: 12
- Views: 3763
Re: Plankton Net Reviews & Discussion
Hi Kurt, good idea to start this thread! A plancton gives access to the huge range of objects to be found in water. At the same time plancto nets are not something one can buy in every department store. For plancton collection I often use the sieve shown here. The stainless steel 50µ mesh can easily...
- Fri Mar 11, 2022 4:08 pm
- Forum: My microscope
- Topic: LOMO MƂP-1
- Replies: 44
- Views: 10695
Re: LOMO Mbp-1
Hi Amoeba, with which name can we adress you? Congratulations to your second microscope, it gives you a lot of parts for acceptable money! The Lomo bino have a tube factor of 1,5 so for most eyes it makes sense to use 7x or 10x eyepieces at max. to avoid getting into empty magnification with the acr...
- Fri Mar 11, 2022 4:31 am
- Forum: My microscope
- Topic: LOMO MƂP-1
- Replies: 44
- Views: 10695
Re: LOMO Mbp-1
For long range focus stacking I would prefer a model with a concentric coarse/fine focus that moves the stage by means of a common roller guide, like a Zeiss Standard 14. On my Phomi 1 the coarse focus moves the stage but over a separate guide and I wouldn't see it as smooth enough to do photo stack...
- Thu Mar 10, 2022 7:16 pm
- Forum: Pictures and Videos
- Topic: More Critters From The Plankton Net
- Replies: 30
- Views: 6664
Re: More Critters From The Plankton Net
Hi Kurt, nice photos! I like the third best as it shows the dynamic movement best. Plancton nets can be made from mesh used for silk screen printing. This can be bought quite cheaply from China or from a printing company in the area it one has a contact person there. I wasn't able to buy it in small...
- Thu Mar 10, 2022 6:52 pm
- Forum: My microscope
- Topic: LOMO MƂP-1
- Replies: 44
- Views: 10695
Re: LOMO Mbp-1
Hi, this Lomo microscope actually is a precise copy of a Zeiss Jena LG microscope that was made from the mid or late 1930s on. I had one made in 1969 and I still have 2 LGs and the quality is similar which means very very good. After the war the russains dismantled the Zeiss factory carefully and to...
- Thu Feb 17, 2022 1:19 pm
- Forum: Microscopes and optics
- Topic: Kruss microscope
- Replies: 9
- Views: 1965
Re: Kruss microscope
Krüss has a different market than Bresser, Amscope and other importers, they sell mainly to companies and institutions not so much to individuals. So they probably have a better quality control and service. The microscope model is probably quite usable, but I see no use in buying it when a GFL is av...
- Sat Feb 12, 2022 9:30 pm
- Forum: Microscopy accessories
- Topic: Choosing a Handheld Microtome
- Replies: 8
- Views: 2756
Re: Choosing a Handheld Microtome
Hi Danielle, making a hand microtome is no difficult machining operation but nevertheless it can be done wrong. For good sectioning one wants a certain friction between inner and outer cylinder, no sloppy fit. The micrometer spindle can handle this friction easily, but the blade won't be able to lif...
- Wed Feb 09, 2022 9:59 am
- Forum: Beginner's corner
- Topic: bacteria population
- Replies: 8
- Views: 2510
Re: bacteria population
When making bacterial cultures it is important to keep out contamination with bacteria and fungi that have nothing to do with the sample. One way to keep the sterile culture plate sterile is by means of hard UV radiation (while using appropriate personal protection). If you do everything right you w...
- Mon Feb 07, 2022 4:30 pm
- Forum: Pictures and Videos
- Topic: Magical Creator
- Replies: 2
- Views: 1000
Re: Magical Creator
Hi Woyjwjl,
Nice video, did you make the slide yourself?
Bob
Nice video, did you make the slide yourself?
Bob
- Mon Feb 07, 2022 7:44 am
- Forum: Beginner's corner
- Topic: Assess imaging levels
- Replies: 18
- Views: 4259
Re: Assess imaging levels
Oblique illumination has not been offered ready made by the bigger manufacturers for many decades. But it is not difficult to setup oblique illumination yourself. It may be enough to hold a finger just below the condenser.
- Sun Feb 06, 2022 8:06 pm
- Forum: Beginner's corner
- Topic: New vs Vintage..
- Replies: 14
- Views: 4451
Re: New vs Vintage..
I think at 200$ you just won't get these developments that were made after WW2. You will get a cheaply made version of what was good enough before the war. Many active amateurs have a few spare microscopes in the cuboard which they will be willig to sell on. Perhaps you might post a "wanted" - threa...
- Sun Feb 06, 2022 3:53 pm
- Forum: Beginner's corner
- Topic: Assess imaging levels
- Replies: 18
- Views: 4259
Re: Assess imaging levels
I started experimenting with observing the pond water using slides... Well, it seems that high-power objectives plus low numerical aperture condensers can also observe effects similar to phase difference, darkfield, DIC, diffraction? Phantom?, well, it's a magical new world..... I would suggest to ...
- Sat Feb 05, 2022 8:54 pm
- Forum: Beginner's corner
- Topic: cover slips
- Replies: 4
- Views: 1355
Re: cover slips
The thickness is usually stated on the objectives. "-" unsually means "doesn't matter", this will be the case with your 4x. 0,17 will probably be written on your 40x and your cover slips should be about this, better a little thinner than thicker. The 100x is oil immersion and the cover slip thicknes...
- Sat Feb 05, 2022 8:29 pm
- Forum: Beginner's corner
- Topic: cover slips
- Replies: 4
- Views: 1355
Re: cover slips
Do you mean size like 18x18mm or thickness like 0,17mm?
- Sat Feb 05, 2022 8:04 pm
- Forum: Beginner's corner
- Topic: Assess imaging levels
- Replies: 18
- Views: 4259
Re: Assess imaging levels
The new version of your photo looks better for me. I took it and set white balance to white for the gaps, increased contrast a little and sharpend a little - how do you like it? I don't know who buys ready made slides - are there institutions who are willing to pay real money like 5-10€ per slide? T...
- Sat Feb 05, 2022 1:17 pm
- Forum: Beginner's corner
- Topic: Assess imaging levels
- Replies: 18
- Views: 4259
Re: Assess imaging levels
Hi Woyjwjl, I would suggest to use the full uploadable size of 1024 pixels on the long side and upt to 500kB per photo. Most objects look better when presented without the black corners. In the second image the white balance is a little on the warm side. I would adjust brightness and contrast so tha...
- Fri Feb 04, 2022 11:27 am
- Forum: Introduce yourself
- Topic: Hello and congratulatios
- Replies: 4
- Views: 1596
Re: Hello and congratulatios
Welcome to the forum!
Microscopy is a nice hobby, especially when one has mastered the first hurdles. With your help your daughter has the chance to find an interesting new occupation.
Bob
Microscopy is a nice hobby, especially when one has mastered the first hurdles. With your help your daughter has the chance to find an interesting new occupation.
Bob
- Fri Feb 04, 2022 11:21 am
- Forum: Sandbox
- Topic: I just don’t get it.
- Replies: 7
- Views: 5100
Re: I just don’t get it.
You can upload photos up to 1024 pixels and 500kb Size directly to the forum. This way they are available for as long as the forum exists. The free image hosters die one after the other and the threads are useless without the images. I use Irfan view for quick image editing.
- Thu Feb 03, 2022 9:20 pm
- Forum: Pictures and Videos
- Topic: Planktonic Diatoms
- Replies: 16
- Views: 4162
- Thu Feb 03, 2022 7:05 am
- Forum: Resources (online, books etc.)
- Topic: Introduction into plancton collection an observation (german)
- Replies: 0
- Views: 936
Introduction into plancton collection an observation (german)
New on our website you can find a nice introduction into plancton collecting and observation technique in german language by Gerd Schmahl: http://www.mikrohamburg.de/Tips/PlanktonGerdSchmahl.pdf The whole package from microscope ovre water bodies, plancton collection, slide making to micro photograp...