>The quick and dirty way would be to create a new layer, make a radial
>gradient on it, and use that as a "mask" of a sort to control the brightness
>in the underlying image.
>
>The problem would be getting it to match up well. I've got to think this
>can't be so hard, but it's beyond my Photoshop skills. It's sort of like the
>inverse of a vignette... Seems like someone should have done it by now, but
>I'm not finding anything in a Google search, either.
>
>---
>Scott GOmez
This would be the equivalent of the centre filter used in super-wide and
panoramic phtography where vignetting is unavoidable. The Voigtlander 12mm
Heliar rectilinear lens, for example, offers an adaptor to fit a 77mm
filter just for this purpose as it loses at least a stop from centre to
edge. Given the price of these filters (about as much as a nice OM-1 in
some cases) then someone somewhere has to have beaten the problem in
Photoshop. Panorama Tools sites might be a lead.
This may do it -
http://www02.nikmultimedia.com/usa/products/colorefexpro/completeset/inter_darke
ncenter.shtml
but it's not clear how it works.
Unfortunately, they don't offer the Darken Filter and B/W Conversion in the
same packages. Bugger.
AndrewF
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