Contax and Nikon have made 'P' non-filters - that's P for protection.
Some lenses with rear filters like old fisheyes have to have a
'normal' filter in position - the lens requires a piece of glass
right there for optimum performance.
Unlike religion, it's not that simple.
Andrew Fildes
afildes@xxxxxxxxxxxxx
On 09/01/2008, at 9:47 AM, Garth Wood wrote:
> The thing to remember about many (but not all) filters is that not
> only
> do they degrade an image, they're *designed* to do so in very
> particular
> ways. Think of a fog filter or a "softnet" filter, for example. All
> special effects filters degrade images.
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