I use a stiff wire brush, or a spray-on oven cleaner for really persistent dirt. (Don't try this yourself unless you know the etymology of the word focus).
On Tue, May 10, 2005 at 11:25:34AM -0700, Norman Baugher wrote: > I never knew my lens had two foci! How do I clean them out? > Norm > > John Forbes wrote: > > >Well, fancy that: > > > >http://en.wikipedia.org/wiki/Focus_(optics) >
