How I increased the working distance of my B&L Stereozoom microscope

[mcovington]

As you know, a magnification-reducing auxiliary lens increases the working distance of a stereo microscope.  Here's how I got 40 mm more working distance...

There is no 0.7x lens on the market for the Bausch & Lomb Stereozoom, so I designed one.  To be precise, I designed a lens to go in the cell in place of my 2x lens (which I never used) and was prepared to have an eyeglass maker make it, but then found the exact thing on Surplus Shed.  More here...

http://www.covingtoninnovations.com/michael/blog/1911/index.html#x191120