Concerning dismantling lenses in order to clean
helicoids, diaphragm
blades etc. you might be interested in Chuck Cole's opinions as
expressed in the ManualMinoltaFree Yahoo group. Somehow I imagine you
might disagree with him, or else you might explain your method of
dealing with the issues he feels so strongly about...
Well, if he's suggesting spaying soemthing into the lens (yes, I have
seen that suggested!), I certainly disapprove. If he;'s suggesting
removing the optical elemenets and applyuing solvent/lubricantmix to the
mount, then that's slightly better, but IMHO that's a method used by
people who can't handle tools and small parts properly, and if you're not
careful, it simply shifts the gummy lubricant, etc, elsewhere where it
will cause toruble lateer. I really do prefer to clean each part separately.
Chuck is also a regular contributor to the camera-fix group, and some
might describe him as, hmm, assertive perhaps, occasionally abrasive
maybe, and I've even seen someone describe him as arrogant. His
attitude to cleaning focussing mechanisms would certainly not involve
any aerosol, and lubricant (of a petrochemical variety at least)
wouldn't be part of his vocabulary in the context of an iris diaphragm!
I thought somebody said I'd _disagree_ with him. So far I can see nothing
to complain about.
Oil is bad new on diaphragm blades, it causes htem to stick. They should
be dry -- the only lubricant I would consider using would be graphite,
and tht shouldn't be necessary. If a diaphragm is sluggish, it's
normally becuaseit has lubricant, not because it;s lacking lubricant.
In fact the last thing I recall him getting het up
about re threads
was that he believes only special lubricants should be allowed near a
lens, and that what's suitably for a focussing screw wouldn't be the
I wouldn't go that far. I think the generic focusing grease avaiable
from, say, MicroTools would be OK on most lens helical threads. Actualy,
I've used normal high melting point grease there with no problems.
-tony