MicrobeHunter.com Microscopy Forum

Last picture of the 1.4 achromat being viewed from below with the led flashlight about 7cm. below the collector lens.

Here are some further pictures with illumination added in.

Abbe condensers are like bald tires. They can do a basic job and get you where you want to go but if there are any changes in the conditions , you need to make a change to take advantage of them. Almost all of the AO/Reichert Microstar 400 series microscopes were fitted with a very good 1.25 N.A. ab...

I'll just make this one comment , though. AO launched a clever plan. and it did sustain them until about 2000 or so when the last Microstar 400 series were made. It seems as though they knew way back in the early 60's that the Japanese juggernaut was going to be a difficult one to evade, so they wen...

These were conceived during that period when the long slide into eventual extinction began, for AO. Up until the 50's, the competition for almost all N.A. made products was house league or additionally from countries that had fairly similar labour costs. In the 50's, unfortunately for many companies...

Lomo to be fair, are fairly good and available at the right price. They are an excellent way of getting into water immersion, if you have a 160mm microscope. They also can be used on some infinity scopes with short barrels( AO 10/20,110/120, 60,160), for dipping and seem to be older Zeiss 160mm desi...

In former times, the term oil immersion was much less used. The term homogeneous immersion was more often seen, this being an acknowledgement that the system worked best with a complete immersion, from the condenser through to the objective front, that maintained as close to homogeneity of the refra...

As an addendum to my earlier post. There is a type of microscope called a TIRF microscope or (TIRFM), which stands for Total Internal Reflection Fluorescence Microscopy. The preferred method of use in this type of microscopy ,is to use a monochromatic laser as an epi illuminator, at an extreme N.A. ...

That's a nice one, Charles. Ebay can be a wealth of resources at times. You obviously have a good parts stock, to come up with the necessary bits to complete it properly.

If I am reading this correctly, it sounds to me like you are describing using a dispersive prism rather than a beam splitter, although it seems that the term beam splitter should be correct, because you are trying to split the beam. A beam splitter would allow a certain amount of light to pass,( thr...

[quote= Prediction: In the future microscope objectives will have rectangular stops to match camera sensor formats. :idea: Electron microscopes have a rectangular image.[/quote] Rectangular frame markers matched to differing film formats have been available as an option for photography for about 100...

SCREEN I use USB camera to computer screen. I see nothing wrong with a square frame vs. a round frame. I like that better also. I keep one binocular with eyepiece so if I need to get a "wider view of where a critter is to recenter the stage. My complaint would be to microscope companies who strayed...

photomicrography being unofficially plastered with a frame What is now standard was once the exception. "Kleenex" was a brand name by Kimberly-Clark and now refers to any facial tissue. "Cellophane" was invented by Innovia Films , but is now just clear flexible crinkly film. As you mentioned previo...

Well, yes. You are using the microscope as a tool in your multi-media pursuits. I once suggested to someone that they utilize microscope images as the basis for textile patterns. That's all good. The fact that you choose not to look through the microscope, is a choice and as someone that also has wo...

It is an interesting and accurate distinction and the intention of the microscope user has to always be a consideration. I am wary of conventions though, because they smack of conformity and restrictiveness, ultimately handcuffing both creativity and documentation. I come from a background of emulsi...

quote I bet early micro photographers would have gone to rectangle images in a heart beat if they could have. The early emulsion systems used om microscopes, were capable of producing rectangular pictures, if the systems that the manufacturers produced were so arranged but they weren't. There were r...

This post was begun to avoid hi-jacking Einman's thread about his Laborlux led conversion, which is a very good post and thread. The QCC made this comment; I used both high power LED (20W) and 100w halogen lighting and do not use filters on either light source. My camera capture programme does all t...

I have seen both 2 and 2.5 micron verniers. Presumably the number of graduations around the circle is different or the screw thread is slightly different; probably the latter. This type of fine focus is threaded into the right side of the arm. As it is turned the shaft and knobs move slightly side t...

Yep; ultimately it doesn't really matter. I find it interesting to see the relative difference between models though, and the relationship between their physical characteristics and use is interesting. Photography in those days , was very difficult and there was potentially a lot of vibration and lo...

Do you have the Spencer 1930 catalog? Thanks again.[/quote] Yes; It is almost identical to the 1929 catalogue. A few models are pictured with enamel parts ,instead of brass and they have made an effort to show parts that are chromed with a different kind of shine than those that are brass. A few mod...

Charles. Microscopes are sold as stands. Everything except the stand are accessories, that are designed to fit the stand and usually many stands. This helps the economy of scale in production. If you go into the 1929 catalogue, which you already have access too, look and see how many binocular heads...

That one was the smallest stand they made prior to w.w. 2, that they considered a research microscope. I had a discussion with the curator of the Harvard Scientific Instruments collection about a year ago, related to this model microscope. They have one they catalogue as a #4, which due to the more ...

I did a quick scan of likely candidates in the U.K. and there is a Baker Interference microscope on ebay.U.K. for L 345.00. Has an original mahogany case, 6 objectives, manuals. If I lived in the U.K. , I would buy it in an instant Those are a version of D.I.C. but perfectly convertible for bright f...

Very true.... Amscope has worked at developing a great reputation.... Amscope stands are used worldwide in all settings.. From hobby to clinical research... I live next door to a large city that has a sales office for all of the big 4... All of this talk about China microscopes has been covered in ...

The big four only have their entry level microscopes made in China and they tend to charge more for them compared to unknown brands because of the name. So, yes I agree that the entry level scopes are probably on a par, with the cheaper big four microscopes but that is as far as it goes. Even though...

One thing I have seen more than I would like to have in old mics., are small areas of cement separation in cemented prisms or beam splitters. Often you cannot see it unless the you hold a light just so. That could be causing the small area of unevenness, even though the prisms look clean. Hopefully ...

One of the problems within the fray of cheap scopes, is that in order to attract buyers, the makers and or distributors often make unreasonable claims about their capability. They know better but the lure of hooking a naive customer is just too great. For centuries, optical science slowly discovered...

Yes; I can see that possibility. This brings up a whole other question , though, that has been stammering from time to time in the back of my mind. I didn't want to hi-jack Einman's thread with it, so can I start another thread with your answer?

very classy , professional looking job. i have a couple of questions . i have been fooling around with leds for a while and my chief gripe with them is the excessive blue colour value, so i have played with yellow filtering. with filament bulbs, the opposite is true, so some degree of blue filtratio...

There you go . Great find! Looks like an SK-E. I guess the differences are that the LK-E has 70mm of focus travel and a 5 hole nosepiece. It does show the light path for the photo tube. Seems the light has to pass through a beamsplitter, for a 30/70 light division and also can be routed through a pr...