Re: B&L Stereozoom 7 Objectives

On Aug 24, 9:28 am, Joe <jganda...@xxxxxxxxx> wrote:
Since Ed mentioned his Stereozooms, I would like to know if anyone has a
source for an objective lens pair (it seems to be a single piece) for a
Stereozoom 7. The one I got looked dirty; I tried cleaning it, but no
good. I then removed the lens to clean the rear of the glass, but it
turns out that the front surface has a matte finish! I don't know what
could have done it, since there are no obvious deep scratches. I still
am able to use the scope, but there is a haze to the image, and the
detail, of course, is crap (so now I'm using my old B&L Stereozoom 3). I
really like this instrument, and would like to be able to use it again.
A lens off of a "parts" machine would be fine, or a NOS lens would do,
as well.

BTW, I wondered if the lens clouding could be due to a fuming acid, or
other noxious stuff, but there seems to be no damage to the rest of the
underside of the scope - just the glass.

Thanks,
Joe

I've seen this before, usually it happens from soldering. Apparently
the solder smoke micro-pits the coatings making the lens unusable.
I've usually told the customer, usually industrial to either replace
the lens or just throw the microscope away, the lens replacement is
just to expensive.

Now a better way to approach this problem is to buy a plain glass
holder which screws into the lens assembly. These are very easy to
get for major makers and quite cheap. In an industrial plant its
better if the customer invests in these and some replacement glass,
its a lot cheaper to buy a plain piece of glass and not have to buy a
microscope.

Thanks,

Kevin Cunningham
SMS

.

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