David J Brooks wrote:

>I have started to play with these filters, found on Mark Roberts site,
>and am happy for the most part, but find my self having to go through
>each one to see the effect.
>
>I have some, but not a lot of usage with B&W film  over the years, but
>not filters. I know the film "see's" colours as different shades, but
>i'm
>wondering if there is a good start point. Like if the photo has a lot
>of red in it, do you start with a red filter, or blue.
>
>Any tips to start.

Start with the color image in Photoshop. Make several duplicate layers 
from the Background layer (2-4 us usually enough for me, but you'll use 
more at first as you learn how this stuff works). Now you have multiple 
layers with an identical image in each one.

Then use a *different* conversion filter on each layer.

You can compare them quickly by switching layer visibility on and off. 
If narrow it down to two different ones, try blending them by reducing 
the opacity on the uppermost one. Heck, you can use the eraser and have 
parts of the image done with different filters.


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