Giles wrote:
>
> I have read in a news group that the 'best' lens cleaner is a
> colloidion one called Opticlean. Does anyone have any experiences
> with this magical stuff?
>
> Apparently a colloidion lens cleaner is one that you gently paint on
> to the lens surface. It then sets or gells forming a film which traps
> all contaminants. Before it sets completely you apply a special
> sticker near the edge which becomes embeded in the film itself. You
> then peel off the film and all dust, greasy fingerprints etc.
>
> I also came across a more general reference to colloidion cleaners on
> the net wherein astronomers home-brewed their own. They stated it was
> the next best method to using a vacuum chamber and a plasma (?).
> Because there was NO abrasive action involved such as with all
> methods involving a liquid + wiping action. They said it was suitable
> for bare metal mirror surfaces. Seems like it would be a good and
> safe way to clean an OM viewfinder mirror.
>
> Has anyone actually used Opticlean? I gather it is quite expensive
> but have never seen a figure mentioned.
>
> Anyone in the UK care to give them a ring and find out where it can be
> obtained and the price?
>
> Caliope Ltd.
> 3 Marfleet Close
> Great Shelford
> Cambridge CB2 5LA
> United Kingdom
>
> Phone: +41.(1)223.844.375
> Fax: +41.(1)223.844.414
>
> I posted this once before but nobody seemed interested or responded
> so I thought I would post it again.
>
> Giles
>
> snip
> >
> > The lens pen is very handy in the field. I got one with a retractable
> > brush on the other end, which handles most of the cleaning. I am
> > a little worried if there may be some long term effects (more abrasion?)
> > I still like the blower, brush and lens tissue combination at home.
> > Breathing on the lens is usually sufficient as cleaning fluid.
> >
> > One problem with cleaning lenses: Even the most gentle cleaning will
> > eventually wear down the coating by simple abrasion.
> >
> > Regards
> > Lars
> > --
> > Lars Haven <mailto:lhaven@xxxxxxxxxxxxx> aka <lhaven@xxxxxxxxxxxx>
> > "When writing about women, one must dip one's pen in a rainbow"
> > D. Diderot
>
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Hi Giles,
After all of the raves about the "Lenspen", I ran out yesterday and got
one. It does work very well but I worry about the required rubbing and
the potential abrasive action. Now I guess I'll have to find some of
your "colloidal goo" - it sounds even better.
-Bob
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