On 02/11/2013 6:25 PM, Paul Stenquist wrote:
I used to do that and after about twenty years of cleaning my vivitar 200/3.5
that way I gave it a good look and realized the front element was pretty much
trashed. So now I'm cautious.
I almost never clean lenses. It saves me the potential problem of
scratching a lens element.
The problem that happens when lenses are cleaned too often is that they
develop cleaning marks, which is scuffing of the glass. Any lens will be
ruined by being kept too clean. Your old Vivitar also had soft glass and
coatings.
Years ago when I sold cameras, we had a dog and pony show put on by the
various reps. This was back in the day when you could smoke in public,
and I was, at the time, a smoker. The Pentax guy had a 50mm lens sitting
on his desk, and he invited anyone who wanted to to butt their cigarette
on the front glass. I think about a dozen of us took him up on the offer
over the course of the day. The lens was completely unharmed by this abuse.
bill
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