Re: How can I determine what objective is needed for my Bausch & Lomb.

Ok, minor problem, the picture won't load.

The other problem is that I have no idea what your two microscopes are. B
and L instruments can be radically different while others are B and L in
name only. The two different paint schemes tell me a little but not enough.

Another point is that you shouldn't use an AO objective on a B and L. A lot
of AO objectives are infinity corrected, that is a huge difference over the
160mm tube length correction system that B and L used. In general you
should only use only B and L objective on a B and L 'scope.

Thanks!

Kevin Cunningham
SMS

"osculate" <rs13497@xxxxxxxxxxxx> wrote in message
news:1127151315.099101.260790@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Kevin,
>
> First, thank you for your response.
>
> In my first posting I didn't mention that the black microscope does
> have only one (1) objective (5X Flat Field Bausch & Lomb) but it seems
> to focus as I would expect it to so I'm thinking that this scope is
> functional.
>
> The gray microscope has three objectives that can all focus while on
> that scope. But... I can take, for example, an objective (AO
> Spencer 5X-N.A.- .14 - 921143) off from the gray microscope that
> focuses when the stage is just about 27mm from the glass on the
> objective and install it on the black microscope. Now it is necessary
> to have the stage about 60mm from the lens and the eyepiece raised
> about 18mm before I can get focus.
>
> I'm not experienced with uploading to web sites but I tried sending
> a couple low quality photos to:
>
> http://photos.groups.yahoo.com/group/microscope/lst?.dir=/Osculate35&.src=gr&.order=&.view=t&.done=http%3a//photos.groups.yahoo.com/group/microscope/lst%3f%26.dir=/%26.src=gr%26.view=t
>
>
> It's my understanding however that anyone trying to view these would
> need an Yahoo ID which I would have to list before they could actually
> see anything.
>
> Again, I'd sure appreciate some helpful feedback.
>
> Sincerely,
> R. Smith
>
>
>
>
> Kevin Cunningham wrote:
>> "osculate" <rs13497@xxxxxxxxxxxx> wrote in message
>> news:1127012921.463411.290440@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> > Greetings... I bought my first two microscopes (two different older
>> > Bausch and Lomb monos) at a local university a few days ago but one of
>> > them doesn't have objectives. I've been trying to explore the web
>> > looking for hints on what I should be looking for but I'm still
>> > confused. Is there info out there somewhere that will give me some
>> > sort of idea of what model microscopes I have and the cooresponding
>> > specs? If I understand what I've read at this point I'd say that the
>> > microscope that does have objectives has a Tl of about 160mm. The
>> > other one without objectives may have a TL in the 180mm area... not
>> > really sure of these measurements. I do know that the objectives from
>> > the one doesn't work in the other one... focus is only possible if the
>> > eyepiece is raised and the stage at it's maximum distance away from the
>> > objective. Any guidance would certainly be appreciated. Sincerely,
>> > R. Smith
>> >
>>
>> R, Could you do us a favor and post a link to some digital pictures?
>> I'll
>> bet the instruments are the old, black bodied ones but it would help to
>> see
>> them both.
>>
>> One point. When there was tube length there were 3 lengths used by
>> various
>> makers. Most used 160mm, E. Leitz used 170mm (actually 162mm but whose's
>> counting) and 210mm used by Nikon for their industrial objectives.
>>
>> I gotta feeling that there might be a problem with the unit that doesn't
>> have any objectives.
>>
>> Kevin Cunningham
>> SMS
>


.

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