Ali Shah wrote:
> Is is recommended
By whom? And why do you believe it?
Filters, when not needed for known and immediate dangers, are even more
problematic with digital than they were with film. Film is never really
flat, but digital sensor covers are and the possibilities for
"interesting" reflection between them and flat filters on the other end
of the lens are all too common.
There was a recent post by someone who had a strange bright spot showing
up in images. After investigating possible solutions ranging from simple
to exotic, and having experts throw up their hands, he removed the
filter (which he probably never mentioned when there when seeking help)
and the problem disappeared.
We also had the instance a few years ago of the eager young newbie who
complained loudly and often about how poor his WA Zuiko was compared to
his other lenses. After many suggestions over many months, I thought to
ask if he had a filter mounted and suggest that if he did, he should
remove it and try again. All the troubles vanished.
It is generally not possible to tell if a filter has a problem visually.
So if you must use a filter regularly, please first do a series of with
vs. without shots and compare them carefully. If strange spots start to
occur, discontinue use.
Moose
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