Pierre Bellavance wrote:
>
> Hi,
>
> While I'm anxiously waiting for my two new babies (20/2.8 and
> 100-400/4.5-5.6L) I'm starting to think about filters.
>
> I already have a 72mm SMC Polarizer that will fit the 20/2.8.
>
> Maybe I should get a 77mm Polarizer ($$$) for the 100-400? Can I use the
> 72mm filter on this lens with an adapter? Maybe at 400mm but not at 100mm?
>
> I only shoot negative color film, and was wondering if I would need other
> filters for outdoors photography.
>
> I've heard of Gradual Neutral Density filters. Are they useful? Maybe for
> the wide angle lens?
>
> Thanks.
>
> Pierre
Pierre,
First, using the 72mm filter on the 77mm lens with a stepping ring will
cause vignetting.
You can go the other way, 77mm filters on 72mm lenses with stepping
rings, without the vignetting but the hoods usually can't be used. But
that is not as big a problem if you don't keep the larger filters on at
all times.
I always have a 1-A or UV filter on my lenses.
Depending on what you shoot outdoors, you might consider an "enhancing"
filter for foliage or a slight warming filter, 81-B.
The circular polarizer will act as a neutral density filter although it
is not graduated.
Enjoy your new toys.
Bob
--
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-73 de Bob [EMAIL PROTECTED]
Everybody has a photographic memory. Some just don't have any film.
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