The ones I have (Cokin, acquired with kits) are slightly graduated at the
transition... mounted close to the lens there is a blend of the light
reduction not a sharp transition.
With 'normal' skys, e.g. partly sunny skies, these filters are just about
the -only- way to get good sky/cloud detail and good ground detail on slide
film, and work pretty well for evening out the exposure range with negative
film too, often you get much better sky detail without losing detail in the
ground shadows.
--
Jim Brokaw
OM-'s of all sorts, and no OM-oney...
on 3/10/04 2:36 PM, Chuck Norcutt at chucknorcutt@xxxxxxxxxxx wrote:
> I have never even considered a split ND filter. I have always assumed
> it would be impossible to line up unless I had the ocean as subject to
> form a perfectly straight horizon. I guess I'm wrong.
>
> Chuck Norcutt
>
> NSURIT@xxxxxxx wrote:
>
>
>> Well, let me answer your question this way. There are few filters I have
>> gone out and bought intentionally as I have accumulated quite a few through
>> kits
>> I've purchased however there are a few I consider to be essential. They are:
>
>> 3) Split neutral density of the Cokin or Singh Ray variety, if you are
>> serious about landscapes. The round ones are, IMHO, useless unless
>> everything you
>> use it for ignores the rule of thirds and is composed with the horizon
>> running
>> right thru the middle of the picture.
>
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