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PostPosted: Mon Jun 10, 2019 5:39 pm 
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Joined: Mon Sep 17, 2018 11:31 pm
Posts: 64
I've been trying to learn how to make permanent mounted insect slides and one problem I ran into was manipulating the little buggers into position with the equipment I have. I decided to break down and get a stereo microscope for this purpose. What I got is an Olympus VT-II, it's a good sturdy metal scope in quite good condition. It's mounted on a base with a light and an adjustable concave mirror with a white plate on the other side. The mirror can swivel and rotate to any position. It has 1X and 2X objectives. The eye pieces have a few numbers on them, G20X and 12.2, they are made by Olympus. I'm assuming the 20X is the power.

It has some numbers painted on the back like it was one of several at some kind of institution. I doubt it was a school, it's in too nice of condition for that.

This is my first stereo microscope, besides using them briefly in school long ago I have very little experience with them. It's very simple to operate, I don't think I'll need the instructions for this but if anyone has some to share that would be appreciated. There is very little information about this scope that I can find on the internet. The focus is a little stiff so I may need to clean it out and re-lube the gears. One thing I noticed when adjusting the mirror is that I get a dark field effect, is this normal for stereo scopes? I do enjoy the stereo effect, I think I'm going to have fun with this one.

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PostPosted: Mon Jun 10, 2019 6:01 pm 
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Joined: Sun Dec 25, 2016 9:11 am
Posts: 1138
Hi Bryan,
congratulations to the new stereo microscope! You will probably find lots of uses for it. I would really really miss mine, at home and at work.
I have an (I think) older Olympus model, the nuclear reactor design type. I use it with 10x eyepieces which resolve everything the objectives have to offer and give a wider field. The original eyepieces were keyhole models where you have to press your eyelids onto the eyepiece to see anything. I bought newer Olympus ones that are much better for me.

Bob


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PostPosted: Mon Jun 10, 2019 6:17 pm 
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Joined: Mon Aug 21, 2017 9:02 pm
Posts: 1956
Bryan wrote:
The eye pieces have a few numbers on them, G20X and 12.2, they are made by Olympus. I'm assuming the 20X is the power.
...It's very simple to operate, I don't think I'll need the instructions for this but if anyone has some to share that would be appreciated. There is very little information about this scope that I can find on the internet. The focus is a little stiff so I may need to clean it out and re-lube the gears. One thing I noticed when adjusting the mirror is that I get a dark field effect, is this normal for stereo scopes? I do enjoy the stereo effect, I think I'm going to have fun with this one.
Congratulations!! the stereoscope is a source of fun right from the start.
If finding the instruction manual on Google is futile, I would try and ask Alan Wood through his web site, he is extremely nice and helpful.
I use my scope at the low mag (10 X 1=10) most of the time, the (10 X 4 = 40) is much less useful since the working space is shallow.
the G20X(12.2) is indeed 20X power, 12.2 field diameter. On my microscope, I prefer lower power and wider field. I purchased a pair of non-brand WF10X/23 eyepieces, quite inexpensive of eBay, and I enjoy them a lot. Olympus also offered eyepieces GWH10X(23) and 15X for the VM microscopes, almost sure they fit on the VT.
I cleaned the focusing gear of my stereoscope and lubricated it with Nyogel 767A grease.
The option of simultaneous illumination, trans- and epi-, is a great benefit.

_________________
Zeiss Standard GFL+Canon EOS-M10, Olympus VMZ stereo


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PostPosted: Mon Jun 10, 2019 6:57 pm 
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Joined: Sat Mar 03, 2018 9:09 pm
Posts: 309
Bryan wrote:
One thing I noticed when adjusting the mirror is that I get a dark field effect, is this normal for stereo scopes?

Having directional oblique illumination is not uncommon on stereos, and it is a bit easoer to implement than full 360° darkfield. A lot of high end bases take this approach.

I hope you get a lot of enjoyment from this scope. I really like the olympus stereos I have used. I agree that gettojg 10x eyepieces is a good idea to broaden your options.


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PostPosted: Mon Jun 10, 2019 11:15 pm 
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Joined: Mon Sep 17, 2018 11:31 pm
Posts: 64
Thanks for all the information everyone, I'll definitely be looking for some 10X eye pieces. It looks like Olympus made a G10X 22 that should work with this scope properly.


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