Can't you just place a small piece of clear glass or
Perspex over the lens to protect it, then when the
Perspex or glass becomes dirty clean it or turf it.

Don't know if this will affect the resolution at the
magnification levels due to impurities if any
 in the materials mentioned above

> > The working distance on the scope is about 4 inches; a 0.5x objective
> > lens would extend that to 6 inches. So soldering under it would
> > probably subject the objective lenses to smoke, rosin, etc.
> >
> > There are (apparently) objective lens shields for this scope, but I
> > haven't seen one yet.

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