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 Post subject: Tribo
PostPosted: Wed Jun 12, 2019 11:26 am 
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Joined: Tue Jun 11, 2019 8:36 pm
Posts: 7
My microscopy history is short. Had a cheap one when I was young in the 1960's -70's.
My interest is curiosity on mother nature.
Getting close to retirement I wanted to add on this curiosity by getting this good looking masterpiece; Zeiss Jena LgOG1 (I believe it is).

So far so good.
However, when I recieved it I found out that the microscope had retired itself before me by getting a rock solid non-moving masterpiece.
Solidified lubrication has made most of the moving parts static.

Since I have some time to retirement I hope that I can bring the Jena masterpiece back to life.
I believe, strongly, that I need this forums help in achieving this.


Attachments:
LgOG1 419341.jpg
LgOG1 419341.jpg [ 136.56 KiB | Viewed 932 times ]

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Tribo
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 Post subject: Re: Tribo
PostPosted: Wed Jun 12, 2019 11:58 am 
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Joined: Mon Aug 21, 2017 9:02 pm
Posts: 1976
Refering only to the objective turret (nosepiece). If that one is stuck. I have been able to make a similar part on a Zeiss West (GFL) rotate freely, by adding some sewing machine light oil on the circumference (after having removed the objectives, of course) and mild heating in an oven (50-60C I think). But, only a 1-2 small drops of oil are needed. Afterwards, carefully inspect the turret and wipe off any single drop of anything (grease, oil etc) with KimWipe or lens tissue.

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


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 Post subject: Re: Tribo
PostPosted: Wed Jun 12, 2019 12:08 pm 
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Joined: Sun Dec 25, 2016 9:11 am
Posts: 1187
Hi Tribo,

congratulations to this nice microscope. It was way ahead of it's time when it came out in 1934 and is still a good to use microscope today.
There was an external Köhler-lamp and a Köhler lamp-base (the "Brotdose"). These and other accessories turn up frequently on german ebay.
I can send you a german repair manual via e-Mail this evening if you send me you e-Mail adress.
Here is a bit to read on Zeiss Jena: https://www.mikroskop-online.de/Mikroskop%20Druckschriften.htm

The Zeiss Jena LG was also produced in Russia and later the boxy version of the Lomo Biolam was based upon it too.
It shares most accessories with the Lumipan, NF, NG. The nosepieces are exchangeable and 5-seat nosepieces are frequently available.

The nosepiece is simple to service, there are no ball bearings in it.

Heating the stand without optical parts to 60 °C will make disassembly much easier.

Bob


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 Post subject: Re: Tribo
PostPosted: Wed Jun 12, 2019 1:30 pm 
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Joined: Tue Jun 11, 2019 8:36 pm
Posts: 7
Thank you Microbob.

Much appreciated.

Looking forward to receive the german repair manual. However it seems that I must wait as I do not have the needed authorisation to PM you yet. Got this message:

"We are sorry, but you are not authorised to use this feature. You may have just registered here and may need to participate more in discussions to be able to use this feature."

Wonder how many posts I need to have before getting authorized.

In the meantime I will be updating myself on the microscope and its history. Thank you for the links; again much appreciated.
Can its age be deducted from its serial number 419341?

The Köhler lamp did not come together with the microscope; however I believe I got part of the system as there was a 'distance' unit to be placed in front of and partly under the microscope.

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Tribo


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 Post subject: Re: Tribo
PostPosted: Wed Jun 12, 2019 1:35 pm 
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Joined: Sun Oct 12, 2014 2:34 am
Posts: 5953
Location: Estepona
Congratulations! Nice to see those beautiful old microscopes not put out to pasture just yet.

Quote:
Looking forward to receive the german repair manual. However it seems that I must wait as I do not have the needed authorisation to PM you yet. Got this message:

"We are sorry, but you are not authorised to use this feature. You may have just registered here and may need to participate more in discussions to be able to use this feature."

Wonder how many posts I need to have before getting authorized.
One can however receive PM posts, if Microbob can send you his email you will get it.

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Zeiss Standard WL on sick leave, Standard 18 & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)


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 Post subject: Re: Tribo
PostPosted: Wed Jun 12, 2019 2:14 pm 
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Joined: Sun Dec 25, 2016 9:11 am
Posts: 1187
75RR wrote:
Microbob can send you his email you will get it.


He has just done this!

I don't think the serial number states the year of manufature as it is the case with all/many Lomo microscopes.

That distance piece is indeed used to keep the external lamp aligned. The lamp itself looks like a toy cannon. It has a diaphragm at the front and swivels on the base. The round sleeve is from red tinted glass and is easily damaged in shipping. You will probably find the lamp in one of the brochures. There are a couple of Zeiss Jena brochures to be found in english language in the internet too.
It is always important to recognize that yours is a "Carl Zeiss Jena" and Hobbsyt46s GFL is a "Carl Zeiss" (West). Two companies, similar names, quite incompatible microscopes. The history of Zeiss is really interesting!


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 Post subject: Re: Tribo
PostPosted: Wed Jun 12, 2019 2:53 pm 
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Joined: Tue Jun 11, 2019 8:36 pm
Posts: 7
Thank you.

Sent you an e-mail using my gmail address.

Yes, interesting and fasinating history involving also CIA. Released 1950 document (Catalog of Zeiss, Jena) in 2001 at this link:

https://www.cia.gov/library/readingroom ... 0008-2.pdf

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Tribo


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 Post subject: Re: Tribo
PostPosted: Wed Jun 12, 2019 3:04 pm 
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Location: Estepona
Tribo wrote:

Yes, interesting and fasinating history involving also CIA. Released 1950 document (Catalog of Zeiss, Jena) in 2001 at this link:

https://www.cia.gov/library/readingroom ... 0008-2.pdf
One tends to forget that spies are first and foremost, bureaucrats!

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Zeiss Standard WL on sick leave, Standard 18 & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)


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 Post subject: Re: Tribo
PostPosted: Thu Jun 13, 2019 4:52 pm 
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Joined: Tue Jun 11, 2019 8:36 pm
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Hobbyst46 wrote:
Refering only to the objective turret (nosepiece). If that one is stuck. I have been able to make a similar part on a Zeiss West (GFL) rotate freely, by adding some sewing machine light oil on the circumference (after having removed the objectives, of course) and mild heating in an oven (50-60C I think). But, only a 1-2 small drops of oil are needed. Afterwards, carefully inspect the turret and wipe off any single drop of anything (grease, oil etc) with KimWipe or lens tissue.


The objective turret rotete freely so no problem there.
Thank you anyway for good advice.

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Tribo


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 Post subject: Re: Tribo
PostPosted: Thu Jun 13, 2019 5:33 pm 
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Joined: Tue Dec 06, 2016 6:22 am
Posts: 569
Location: Santa Cruz, CA
Beautiful microscope.


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