Re: A strange Zeiss mono-tube
From: Aaron (nghy_at_comcast.net)
Date: 12/14/04
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Date: 14 Dec 2004 10:42:17 -0600
Hi Kevin,
I have a contact with a repair manager who has been with Zeiss for 40
years and worked on a wide rage of Zeiss equipment.. I sent him the
link so he could look at the part for hiself. After conferring with
others this was the assessment:.....
This is not an original Zeiss part. It makes no sense for any Zeiss
apparatus, microcsope or photographic equipment. He thinks the
standard photo port was adapted by parties unknow after the part was
sold by Zeiss and adapted for some specialized device also unknown. .
Aaron
On Sat, 11 Dec 2004 00:16:36 -0600, Gordon Couger
<gcouger@XXXXcouger.com> wrote:
>Kevin Sunley wrote:
>
>> I have an obscure question that I'm hoping someone may know
>> something about.
>>
>> It concerns a West German Zeiss straight (non-inclined) microscope
>> mono-tube, such as one used to mount a camera. This tube (see picture)
>> has a collar to allow the tube length to be adjusted, but this feature
>> is not directly related to my question.
>>
>> The tube can be seen here:
>>
>> http://www.sunley.ca/microscope/images/images.html
>>
>> .. click on the "Zeiss non-inclined mono-tube with lens".
>>
>>
>> Now comes the question. It concerns the lens that is factory mounted
>> inside the tube, which can be seen if you look closely at the
>> picture showing the bottom of the tube.
>>
>> The person I bought the tube from was quite confident that its
>> origin was from a Zeiss microspectrophotometer which was built with
>> some quartz optics. As it turns out the lenses do not seem to be
>> quartz (no transmission below 340nm), but it still seems to be an
>> interesting part.
>>
>> Firstly, the lens inside the tube, although it seems to be factory
>> mounted, seems to be a post-manufacturing addition to a regular
>> adjustable monotube. This is because the item was painted prior to
>> milling out portions of the tube's inside to fit the lens mount.
>> This might indicate that it may be a part from a unit which was not
>> manufactured in a great quantity.
>>
>> Secondly, although my first thought was that it was for changing the
>> tube length of the optical path, the lens instead seems to function as
>> one of two things:
>>
>> 1) a permenantly mounted bertrand lens (most likely)
>> 2) some sort of permentantly mounted eyepiece,
>>
>> This is because if I use the tube with a Zeiss eyepiece, I see a
>> very sharp, clear, and magnified view of the back focal plane of the
>> objective.
>>
>> If I use the tube without an eyepiece, a view of the specimen can be
>> seen just by looking down the tube, but it is hard to focus on, and
>> you have to keep your eye very(!) close to the tube.
>>
>>
>> So I'm leaning towards a bertrand lens system, but not ruling out it
>> being a lens to use the microscope with some type of video camera
>> and/or photomultiplier system. The latter seems unlikely though, as
>> a tube used with Zeiss' microspectrophotometer would likely have had
>> quartz lenses (since most of the units allowed %T measurements into
>> the far-UV).
>>
>>
>> So can anyone think of any reason or type of equipment that would
>> have a non-removable bertrand lens in it. I know there are many
>> analytical uses of microscopes, including microspectrophotometers,
>> FTIRs, etc., and it could be from any of these, or something
>> completely unrelated like a dedicated conoscopic microscope (if such a
>> thing was ever made).
>>
>> The last bit of possibly helpful information I have is that I have
>> seen the exact same type of adjustable straight tube, but without
>> any lenses internal to it. But the non-lensed tube did not have the
>> white ring around its base. So the ring seems to indicate that the
>> tube has some type of special use, but that's all I know.
>>
>> Also, the lenses do not seem to be coated (which seems unusual for
>> most post-WWII Zeiss optics I've seen).
>>
>>
>> Any and all guesses are appreciated.
>>
>
>Kevin,
>
>That is an eyepiece tube that mounts on the standard Zeiss
>dovetail and appears to have a diopter adjustment. It generally
>used to replace the binocular head piece and give a solid
>vertical mount for a camera. That tube is also very handy for
>aligning the rest of the scope.
>
>I expect the diopter adjustment is so the tube can be set so it
>is parafocal with the binocular head piece. I expect even Zeiss
>optics vary enough that there are binocular head pieces that are
>not exactly the same.
>
>Gordon
>Gordon Couger
>
>I collect links on information related to light microscopes.
>http://www.couger.com/microscope/links/gclinks.html
>Please forward anything you think might be useful to others.
>Microscope Documentation is at www.science-info.org
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