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ON1 Photo RAW & Effects has a great black and white conversion filter. It delivers deep, rich black and crisp whites. You can do a lot to make a strong black and white with just that filter.

Go a step further with Local Adjustments and the Edges shaped mask, and you have a flexible, targeted editing tool. Make specific tweaks to highlights, shadows, blacks, and whites to select areas of your photo quickly and easily.

And - you have all the additional power of the ON1 masking tools to further refine an adjustment for very targeted results. Try using a luminosity mask with an edges shaped mask for smooth, nuanced, natural masks.