[EMAIL PROTECTED] wrote:
Although I have UV filters for most of my lenses, I rarely use them,
preferring a lens hood to protect the front element. I can't honestly say
that sharpness is impaired, but I have seen them cause flare or ghost
images. If I expect salt spray or dusty conditions, I would use a UV
filter, but they do provide another air/glass surface to cause flare under
difficult lighting conditions. The UV filters have also been used when
I've inadvertently lost a lens cap.
Geoff Doane
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Geoff,
You bring up a good point. Adding another glass/air surface can cause a
problem. A hood is the best insurance one has against this added surface to
cause a problem at all. The reason you use a UV is to pull out the blue in
high altitudes or near the ocean. Aside that they gain you nothing. UV
filters are defined by L #s. The higher the # the better the filter to
eliminate UV. Hoya is an L39 but the new Super HMC Pro UV are L41. Nikons
and others are L37 (surprise!).
To see if your UV is worth anything, place it on a flurescent light (light
box if you have one). If the UV turns a yellow tint with the light on its a
decent filter. If it does nothing, its junk!
Peter K
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