Re: A microscope new to me

From: Aaron (nghy_at_comcast.net)
Date: 07/01/04 

Date: 30 Jun 2004 21:09:18 -0500

Seems like a DynaZoom from the 1960's The knob on the head is in fact
a control for a 1-2X zoom in the head. The head sits in a ring at the
end of the arm.. There are two steel points near the arm side of the
ring that center the head over the condenser. A thumb screw on the
front pushes the head against the other steel points. The points
can be screwed in and out to obtain the correct centration. You have
to look carefully as these are counter sunk. If you loosen the thumb
screw enough you can lift the head out of the ring to see the points..

Is this the scope you are describing?

http://www.nhm.ac.uk/hosted_sites/quekett/Others/BL-Zoom.html

Aaron

On Wed, 30 Jun 2004 02:18:49 GMT, "Joe Pylka" <jpylka@earthlink.net>
wrote:

>I recently acquired a B&L microscope, a model unfamiliar to me. It is very
>large and probably a research microscope of some sort. Somehow I'm reminded
>of a BalPlan but this is older, perhaps from the 70s. I have two questions
>about this model .
>
>First, there is an aluminum knob sticking straight up on the binocular head.
>This one is free-spinning so I assume that it's not functioning properly.
>But what is that function? I'm guessing it may be some sort of zoom
>control.
>
>Second, the mechanical stage and substage condenser do not seem to be
>aligned with the built in light source and the objective lenses. There's
>about a 4-6 mm discrepancy. This is a solidly built 'scope and I can't find
>anything that looks like it is some centering control. Is there anything
>there that I can do to line things up? I'm familiar with other makes of
>'scope but this one's different.
>
>Can anyone hazard a guess as to what model this may be?
>

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