MicrobeHunter.com Microscopy Forum

Does anyone know if there is anything special about a 6v or 12v G4 Halogen lamp for a microscope compared to a standard one?

Something along these lines may be whst you are after.

https://www.lumileds.com/products/high-power-leds

I was trying to explain in an uncomplicated way from one beginner to other beginners.

I am new and I know nothing. I have a zoomable stereo and a Leitz compound. The stereo is great fun, easy to use. It apparently goes from 7 to 45 mag. The focus is too coarse at higher mag but manageable. Maybe one day I can modify it. The advantages are a huge working distance and at lower mag, ver...

I guess that's a fluke and not a rule.

Standard slides are easy but I use them for petrology thin sections and they are fragile. I have some 2mm glass which also allows me to cut custom sizes. I like 30 x 75. Now you mention the condenser, I will experiment

There are basically two types of LED arrays. Constant voltage and constant current. I get the feeling you are trying to compare LED to incandescent directly. They are two different types of light source. Bit like comparing fluroescent to incandescent.

General question. Why are slides so thin? Can i use thicker glass?

Frank Reiser from Frank's Beautiful Rocks and Minerals. He does one on using a petroscope.
https://youtu.be/YcQ65okLXTk

Thanks.
What would a typical WD for same objective be?

With Leitz objectives. EF 40/ 0.65 P. Is the WD 0.65mm?

You will need a COB style to get 10 watts. Bigclive.com on you tube has a lot of handy led info. If you are using raw LED then you need current limiting. Sounds like you need a better power supply if the voltage at its output is dropping. I use an iron ore lighting transformer (they are being thrown...

Are you looking for a direct replacement or something you can play around and build yourself? Quality LED chips produce about 100 lumens per watt now. You can get chips with a CRI of 97. For quality LED chips, you will need to look outside normal suppliers.

There is also a short you tube. Just search spindle stage.

Some may find this interesting.

Gotta love the university of you tube. There's some really good videos by a bloke called microbehunter,worth watching.

A lot of info well presented

https://youtu.be/ZRZ9_ov6Fak

Jb89. Be very interested to hear conclusions. I have identified a couple of UV cure. Viscosity is a bit high at 2000 but found one that is 300 and RI of about 1.53. UV cure. Haven't tried it yet. I like the idea of controlling the rest time before cure to allow the bonding agent to flow very thin. T...

Jasper plumes. Low mag stereo. A mixture of iron minerals in clear Chalcedony

With regards polarising petrographic microscopes. Generally, which is considered a better brand? Leitz or Zeiss? Which is likely to be more resellable,all things being equal.

Interesting. Like to see more along those lines.

For anyone in Australia looking to buy, I have found Telescopes and Astronomy in South Australia very friendly. They also do microscopes, new and used. They just didn't have what I was after but they tried.

Does anyone know what sort of quality a Leitz Laborlux 11 is? I have found a pol for sale but not sure of the price. Hence, trying to get some idea what they are like. Second hand petrographic microscopes are almost non existant in Australia.

I have come to the conclusion, with out testing my theory, so take it with a grain of salt. When I frost a slide, I am creating many fine facets. If the adhesive has a different RI, it will refract at those facets. This scatters the polarised light and de polarises it. Bonding agents used in univers...

I appreciate any help or feedback.

A quick search will give you numerous instructional videos and documents from universities, colleges, equipment manufacturers etc.

They all say to frost the slides and flatten them. Amazing how un flat float glass is. The petrographic suppliers sell frosted and clear slides. The finished specimen needs to be between 29 and 31 microns so a flat slide is essential.

I was wondering the same thing. I use W10 and have colour accuracy issues plus I can only save in jpeg (that I can find, anyway). Just want to capture camera images and vids accurately with little editing required. Will have a look at those couple mentioned.

Your very first question is budget. Then required image quality.