Restored Leitz Großfeld Stereomikroskop TS

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Sabatini
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Restored Leitz Großfeld Stereomikroskop TS

#1 Post by Sabatini » Wed Feb 03, 2021 7:11 pm

Best regards
If anyone has any information regarding this stereoscope
It looks like a leitz.
They are selling it for $90
Thank you for your
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Last edited by Sabatini on Mon Feb 15, 2021 10:08 pm, edited 1 time in total.

Scarodactyl
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Re: Stereoscope leitz??

#2 Post by Scarodactyl » Wed Feb 03, 2021 7:33 pm

It's an old make, old style stereo, but Leitz stereos havw a very good reputation. If you don't need a continuous zoom they are a great value. This one looks very dusty though, and I would worry about mold on the optics.

MicroBob
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Re: Stereoscope leitz??

#3 Post by MicroBob » Wed Feb 03, 2021 8:25 pm

Hi,
this is a Leitz Großfeld Stereomikroskop TS from the 1970s. It usually is equipped with 24mm eyepieces. The 1x objective pair is invisible inside the stereo microscope body. The column is spring loaded and extends to be used with the shown very useful transmitted light table. The 1x objective has a very high n.a. of 0,05 and the image is especially crisp. The stronger objectives have increasingly normal apertures and the 10x n.a. 0,1 only gives a good but unspectacular view. But the TS still is probably one of the best resolving cheaper stereo microscopes. Also I don't know of any special maladies, only frequently heavy use due to good usability. And imagine you were the specimen and someone were looking down at you through such an objective pair - wouldn't you give your very best? :lol:
I like mine a lot. And 24mm field of view- nice!

Bob
Attachments
Leitz Großfeld Stereomikroskop TS Objektive und Aperturen.jpg
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Sabatini
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Re: Stereoscope leitz??

#4 Post by Sabatini » Wed Feb 03, 2021 8:45 pm

Okay
Thank you very much for your kind explanation. I value your opinion very much.
I will buy it for the $80 they are asking for.Okay
Anda if all goes well I will be expanding the post with pictures of the restoration process and how it works in general.

Sabatini
Posts: 464
Joined: Tue Nov 12, 2019 3:09 am

Re: Stereoscope leitz??

#5 Post by Sabatini » Wed Feb 03, 2021 9:12 pm

[
Hi,
this is a Leitz Großfeld Stereomikroskop TS from the 1970s. It usually is equipped with 24mm eyepieces. The 1x objective pair is invisible inside the stereo microscope body. The column is spring loaded and extends to be used with the shown very useful transmitted light table. The 1x objective has a very high n.a. of 0,05 and the image is especially crisp. The stronger objectives have increasingly normal apertures and the 10x n.a. 0,1 only gives a good but unspectacular view. But the TS still is probably one of the best resolving cheaper stereo microscopes. Also I don't know of any special maladies, only frequently heavy use due to good usability. And imagine you were the specimen and someone were looking down at you through such an objective pair - wouldn't you give your very best? :lol:
I like mine a lot. And 24mm field of view- nice!

Bob
[/quote]
I can't see the images.
could you fix it please, or is just me.
Thanks
attachment=0]IMG_20210203_161249.jpg[/attachment]
MicroBob wrote:
Wed Feb 03, 2021 8:25 pm
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MicroBob
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Re: Stereoscope leitz??

#6 Post by MicroBob » Wed Feb 03, 2021 9:23 pm

Sorry, it is just a table of the available objective magnifications and the apertures.

Here is the full leaflet: https://www.google.com/url?sa=t&rct=j&q ... Qt24PSjtdj

Sabatini
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Re: Stereoscope leitz??

#7 Post by Sabatini » Thu Feb 04, 2021 1:38 am

MicroBob wrote:
Wed Feb 03, 2021 9:23 pm
Sorry, it is just a table of the available objective magnifications and the apertures.

Here is the full leaflet: https://www.google.com/url?sa=t&rct=j&q ... Qt24PSjtdj
,😅In the middle of the rush to go to consign the value of the equipment, I do not even know what I read.
Thanks to your recommendation I already bought it but I think it arrives on Friday.
It will be fine if when it arrives and I start dismantling it, I would like your support if anything comes up.
Thanks MicroBob

Sabatini
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Re: Stereoscope leitz??

#8 Post by Sabatini » Wed Feb 10, 2021 1:04 am

The Leitz stereo scope finally arrived.
It is a very nice and robust equipment but it is also very dirty, the optics are fine, well at least it is without fungus, but very very full of dust.
I have already disassembled enough of it, but there is still a long way to go.
Let the fun begin!
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Sabatini
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Re: Stereoscope leitz??

#9 Post by Sabatini » Fri Feb 12, 2021 6:29 pm

Updated.
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Still much to do...

Sabatini
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Re: Stereoscope leitz??

#10 Post by Sabatini » Sat Feb 13, 2021 1:08 am

Today I finally got to the prisms...no fungus or mold, the optics are impeccable.
Tomorrow to assemble and put it all together.
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hans
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Re: Stereoscope leitz??

#11 Post by hans » Sat Feb 13, 2021 9:23 pm

Looks nice. Seeing the results of someone else cleaning all the dirt and grime off an old, high-quality microscope is almost as satisfying as doing it yourself, but much less time-consuming.

Sabatini
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Re: Stereoscope leitz??

#12 Post by Sabatini » Sun Feb 14, 2021 3:11 am

hans wrote:
Sat Feb 13, 2021 9:23 pm
Looks nice. Seeing the results of someone else cleaning all the dirt and grime off an old, high-quality microscope is almost as satisfying as doing it yourself, but much less time-consuming.
Hans
Thank you very much for your interest.
The truth is that I am leaving it very nice and clean. Fortunately the optics are in perfect condition and that encouraged me even more to make an effort to leave it shining... today I had some fun installing the 1x magnification elements.
And tomorrow I'll finish the rest....and see how it looks and work.
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Sabatini
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Re: Stereoscope leitz??

#13 Post by Sabatini » Mon Feb 15, 2021 7:26 pm

Well...hello again.
Here are my brand new refurbished
Leitz Großfeld Stereomikroskop TS .
It was a real fun, a pleasure and a good fortune that this beautiful German engineered optical instrument crossed my hands.
I tried my best...Smooth and shiny and giving me some rather pleasant images.
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MicroBob
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Re: Stereoscope leitz??

#14 Post by MicroBob » Mon Feb 15, 2021 8:47 pm

Wow congratulation! That is quite a transformation from the former flying dutchman to this beauty. I'm sure you will enjoy the instrument. They look a bit stange and intimidating compared to the slicker look of more modern instruments but they can top the performance of many of them. And they tend to wear well.

Bob

Sabatini
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Re: Restored Leitz Großfeld Stereomikroskop TS

#15 Post by Sabatini » Mon Feb 15, 2021 10:09 pm

MicroBob.
Thanks you kindly.

hans
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Re: Restored Leitz Großfeld Stereomikroskop TS

#16 Post by hans » Tue Feb 16, 2021 5:54 am

Looks almost new. What is the little clamp thing on the left side of the mounting ring used for?

Sabatini
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Re: Restored Leitz Großfeld Stereomikroskop TS

#17 Post by Sabatini » Tue Feb 16, 2021 4:11 pm

hans wrote:
Tue Feb 16, 2021 5:54 am
Looks almost new. What is the little clamp thing on the left side of the mounting ring used for?
Hello hans.
Thanks you.
It is a clamp to place lights and it can be moved around the silver ring where you want to direct the lighting.
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But I have one drawback, and that is that I have not yet been able to perfectly collimate one of the prisms.

PeteM
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Re: Restored Leitz Großfeld Stereomikroskop TS

#18 Post by PeteM » Tue Feb 16, 2021 5:45 pm

Looks wonderful.

Sabatini
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Re: Restored Leitz Großfeld Stereomikroskop TS

#19 Post by Sabatini » Tue Feb 16, 2021 5:51 pm

PeteM wrote:
Tue Feb 16, 2021 5:45 pm
Looks wonderful.
Thanks you sir.
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MicroBob
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Re: Restored Leitz Großfeld Stereomikroskop TS

#20 Post by MicroBob » Tue Feb 16, 2021 8:05 pm

The two light pathes have an included angle of 15° on this scope. So for photography it is useful to have an angled base with 7,5° included angle. I have made one of these with the 3D-printer but a pencil and CD cover will do. The objectives have some potential for photography as the apertures are not too low. They are not fully plan though.

Bob

ScienceMatters
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Re: Restored Leitz Großfeld Stereomikroskop TS

#21 Post by ScienceMatters » Tue Feb 16, 2021 11:00 pm

Nice work! It looks totally transformed. Would love to see more pics, such as a photo of an insect perhaps!

Sabatini
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Re: Restored Leitz Großfeld Stereomikroskop TS

#22 Post by Sabatini » Wed Feb 17, 2021 5:14 am

MicroBob wrote:
Tue Feb 16, 2021 8:05 pm
The two light pathes have an included angle of 15° on this scope. So for photography it is useful to have an angled base with 7,5° included angle. I have made one of these with the 3D-printer but a pencil and CD cover will do. The objectives have some potential for photography as the apertures are not too low. They are not fully plan though.

Bob
Thanks MicroBob.
I understand what you want to explain. I did some research and Leitz has a mechanism that allows you to vascularize the equipment in order to be able to take the picture with the necessary plane correction.
Although if it would be possible for you to send an image of the project you are talking about it would be nice to try to implement it.
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Sabatini
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Re: Restored Leitz Großfeld Stereomikroskop TS

#23 Post by Sabatini » Wed Feb 17, 2021 5:29 am

ScienceMatters wrote:
Tue Feb 16, 2021 11:00 pm
Nice work! It looks totally transformed. Would love to see more pics, such as a photo of an insect perhaps!
Thanks for your kind words .
I will gladly be looking for a striking specimen to photograph and know your opinion.... tomorrow is hunting day.
Maybe some spiders.

ScienceMatters
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Re: Restored Leitz Großfeld Stereomikroskop TS

#24 Post by ScienceMatters » Wed Feb 17, 2021 6:45 am

Awesome!

MicroBob
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Re: Restored Leitz Großfeld Stereomikroskop TS

#25 Post by MicroBob » Wed Feb 17, 2021 7:14 am

Sabatini wrote:
Wed Feb 17, 2021 5:14 am
I did some research and Leitz has a mechanism that allows you to vascularize the equipment in order to be able to take the picture with the necessary plane correction.
You are right, this is a special feature that is not available on all stands on the market. By tilting sideways by 7.5°one of the optical axes is vertical to the base. My stand doesn't have this feature.
The angle plate I designed has an included angle of 7,5°, a hole in the middle and an optional bar to keep things from moving downward. I don't do much photography in this magnification range but it works nicely.

Bob
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Hobbyst46
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Re: Restored Leitz Großfeld Stereomikroskop TS

#26 Post by Hobbyst46 » Wed Feb 17, 2021 11:20 am

Very well done, Sabatini!

apochronaut
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Re: Restored Leitz Großfeld Stereomikroskop TS

#27 Post by apochronaut » Wed Feb 17, 2021 12:33 pm

Sabatini wrote:
Tue Feb 16, 2021 5:51 pm
PeteM wrote:
Tue Feb 16, 2021 5:45 pm
Looks wonderful.
Thanks you sir.
IMG_20210216_132435.jpg
That is a beautifully restored instrument. If my eyes are not deceiving me, it looks like there is a yellow band at the field stop. Compensating eyepieces, which implies something about the objective corrections. They might be at the very least, fluorite types.

Sabatini
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Re: Restored Leitz Großfeld Stereomikroskop TS

#28 Post by Sabatini » Wed Feb 17, 2021 6:11 pm

MicroBob
Hobbys46.
Thank you for your always present support.

Scarodactyl
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Re: Restored Leitz Großfeld Stereomikroskop TS

#29 Post by Scarodactyl » Wed Feb 17, 2021 6:15 pm

Sabatini wrote:
Wed Feb 17, 2021 5:14 am
Thanks MicroBob.
I understand what you want to explain. I did some research and Leitz has a mechanism that allows you to vascularize the equipment in order to be able to take the picture with the necessary plane correction.
IMG_20210217_000150.jpg
Oh, now that's just nifty.

Sabatini
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Re: Restored Leitz Großfeld Stereomikroskop TS

#30 Post by Sabatini » Wed Feb 17, 2021 6:46 pm

apochronaut wrote:
Wed Feb 17, 2021 12:33 pm
Sabatini wrote:
Tue Feb 16, 2021 5:51 pm
PeteM wrote:
Tue Feb 16, 2021 5:45 pm
Looks wonderful.
Thanks you sir.
IMG_20210216_132435.jpg
That is a beautifully restored instrument. If my eyes are not deceiving me, it looks like there is a yellow band at the field stop. Compensating eyepieces, which implies something about the objective corrections. They might be at the very least, fluorite types.
Thanks you sir,
At least I was able to rescue it, it was in a cellar, it helped that this cellar was near a volcanic area, a very dry and arid region and the optics were very safe from humidity and very dry .
very interesting your technical appreciation.
Quite possibly since the images are very sharp and contrasted, images are very impressive.I have a mitutoyo finescope microscope with Mplan apo 5x objective and they are at the height of those objectives, maybe not so much in terms of saturated colors that the Mitutoyos produce, but they have an expectacular contrast.
On the other hand when I took the picture the prisms were quite misaligned, yesterday I spent more than 5 hours trying to collimate it, it was a real question of patience, I have already aligned other Leitz heads, almost all my equipment are Leitz, but this was another world, I could not center the two images ...but successfully I did it!!!!
This morning I went hunting and caught jumping spiders, which I will photograph this afternoon. It might be possible for you to look at them and let me know what you think.

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