The conclusion was that since the coatings are inorganic, alcohol was
OK.
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 vacuume 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
Giles
Chris Barker <cmib@xxxxxxx> wrote:-
> So chaps, have we decided whether isopropyl alcohol is good for
> cleaning lenses if we have to rub the lens at all to get a grease
> mark off, or does it degrade the coating? I am afraid I lost the
> thread. I thought that Hans' summary of the value of reflex lenses
> was a good one. He did not mention that the out-of-focus highlights
> was a rather clic d device at one time, but which might look quite
att>
> BTW for Kristine, I'm a military pilot, but I would dearly love to become
> a pro photog, using the best of OM and Zuiko - what bliss - but I'm
> afraid that the spirit is willing but the artistic flesh >
> Chris
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