>Wrote Brian E. Robinson:
>
>>What is the general consensus on using lens filters? On some of my
>>lenses I have clear glass B+H filters and some are exposed lenses. Is it
>>best to use a lens filter to protect the main lens or does the added
>>glass of the filter detract from the quality of the photo?
>
When my father-in-law introduced me to photography way back when, he made it a
point to extol the virtues of a skylight filter on every lens for protection.
Since then I have modified his lesson somewhat to use UV filters; to this day I
follow that teaching with the sole exception of my macro lenses. The lenses I
use the most often (300mm, 35-80 zoom) have each had their filters replaced
once because of damage from flying debris, but the real lens elements are still
flawless.
I have no problem agreeing with anyone who states the addition of two
air-to-glass surfaces can degrade an image. In theory they are absolutely
correct. As a practical matter, the loss is sufficiently small as to be
acceptable compared to the risk of damaging the lens.
John P
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