[EMAIL PROTECTED] wrote:
Maybe because Sigma include the hood with their lens and that Canon
> does not. Some of them photographers may not realize how useful a lens
> hood is and did not purchase a hood for their Canon lenses.
Canon may not include lens hoods with the shorter/cheaper lenses, but they
are included the L teles that I'm familiar with.
> Personally, I do not use a UV filter. After comparing images with and
> without the filter, I find that images without the filter are sharper.
> The UV filter degrade image slightly. I can't see any UV reduction in
> my pictures. I'll have to try it again on a bright sunny day.
>
> CC
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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