I have never had problems with dust accumulating in lenses, and I have
several old primes. I guess if I take the brightest LED flashlight I
have and shine it in the lens I will see some dust. MOre evidence that
this world is not perfect but nothing to get worried about.
Lenses *do* wear out. I wore out a an A* 200mm macro - the mechanics
just plain wore out after hundreds of thousands of shots. Lenses are
mechanical devices and all mechanical devices wear out. Second law of
thermodynamics. Personally, I think that sending a lens out to be
cleaned is both a waste of money (the net reuslts of the cleaning is
likely to be minimal) and probably more damaging to the lens (the
additional entropy introduced by taking the lens apart and putting it
back together is probably worse that the accumulated entropy of the lens
just gathering dust.) I clean my lenses regularly with a microfiber
cloth, lens pen, sometimes with lens cleaning fluid. If I do something
that causes concern - like dropping the lens a significant distance - I
will send it in to get checked out. Cmaera bodies probably benefit more
form CLA's than do lenses, but that rule applied more to old film bodies
that one could reasonably expect to use for many years. Most digital
bodies go obsolete and are replaced well before they need to be CLA'd.
but don't expect lenses to last forever. Mechanical components
deteriorate. Lens elements separate. The adhesives used in
multi-elements fog or get fungus, lots of things happen. When they go,
toss em and get new ones.
Mark C
On 3/23/2013 7:15 PM, Zos Xavius wrote:
Ok, sorry this is turning into a long ramble. My question is that how
do I deal with constant dust accumulating in my primes? Is this
something that's just to be expected and I should look at sending
lenses out every few years for cleanings?
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