Maybe you should look at a filter from these guys, I have the ND vario
with polariser and the quality is good.
especially this one
http://www.singh-ray.com/goldnblue.html
On 02/11/2009 23:46, Brian Swale wrote:
> Among the options I am considering currently, I include: (a) the Ambico
> system of graduated filters to darken the sky. I have found all the filters
> and
> holders but can't find the shade box. There are some on eBay. This will
> lessen the "range of illumination" emanating from the bright sky problem.
>
>
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