If you’ve shot in Raw, when you open the image it first comes up in a Raw window where you can tweak the image in many ways.
There are eight icons at the top of the Raw dialog box below the list of settings and histogram of your image.
The first thing you’ll want to do is tweak in the Basic Settings (the first tab). Just move the sliders (Exposure, Recovery, Fill Light, Blacks, Brightness and Contrast) around to get the effect you want.
The fourth tab over is HSL/Grayscale. After you click on that icon, you’ll get to convert to black and white by clicking on Covert to Grayscale. From there you tweak the color sliders (which are actually grayscale sliders) to hone in even more on the contrast.
In the main program all you have to do is navigate to Image>Adjustmenst>Black & White. Color sliders will appear in a dialog box (they’re actually grayscale sliders).
Click and drag on those to get the effect you want.by