You could get a Leica Monochrom and shoot B&W raw files ;-)
Tina
On Mon, Jun 16, 2014 at 10:23 AM, Chris Trask <christrask@xxxxxxxxxxxxx>
wrote:
> >
> >Just leave the color filters at home. There's nothing they can do that
> >can't be done (and done better) in post processing.
> >
> >As to using the color filters with a positive color image to produce a
> >post-processed B&W, I don't think that's going to work. Remember that
> >those red, orange, yellow, green filters are meant to work with negative
> >film. They are filtering the complementary colors of the final positive
> >image. In this RGB color wheel
> ><
> http://en.wikipedia.org/wiki/Complementary_color#mediaviewer/File:RBG_color_wheel.svg
> >
> >note that the yellow, orange and red (which you associate with darker
> >skies and contrasty clouds on B&W images) are filtering the blue, azure
> >and cyan on the opposite sides of the wheel. When working with positive
> >RGB images one must filter the positive color as you do when working
> >with the software. Imagine what you'd get if you stuck these red,
> >yellow and orange filters over a lens shooting an Ektachrome image. Not
> >what you'd want although it would work with color negative film which
> >you could later convert or print as B&W if desired.
> >
>
> Duh! I had completely overlooked that! And I should know better.
> So, instead of filtering with the complementary colour as we are used to
> we now instead filter with the primary colour.
>
> I came to a conclusion with both the glass and emulated filters
> yesterday after hours of experimenting with various methods using the
> colour star in the back of "Filter Practice". Just as I had experienced
> earlier before all this effort began, the green filter, either glass or
> emulated, has little if any effect on the final B&W product, and that can
> be seen on the histograms.
>
> So, if I want to do detailed B&W photography I'm going to have to
> stick with film. Or, learn an entirely different method. Is there perhaps
> a way of taking a colour image, producing a negative which can then be
> filtered, converted back to a positive image, and then converted to a B&W
> image?
>
> I do have a Wratten 49 blue filter, so I will go out later today and
> see what effect that has.
>
> BTW: I'm told that the best place to buy filters is Copenhägen, as
> there is always something Wratten in Denmark.
>
>
> Chris
>
> When the going gets weird, the weird turn pro
> - Hunter S. Thompson
> --
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>
--
Tina Manley
http:// <http://tina-manley.artistwebsites.com/>www.tinamanley.com
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