Look for Contrast, Shape and Texture The complimentary and opposing colours that bring a colour image to life are all reduced to black and white or shades of grey in a monochrome image and you have to look for tonal contrast to make a shot stand out.
In colour photography, for example, your eye would immediately be drawn to a red object on a green background, but in monochrome photography these two areas are likely to have the same brightness, so the image looks flat and dull straight from the camera.
Fortunately, it’s possible to work adjust the brightness of these two colours separately to introduce some contrast. However, a good starting point is to look for scenes with tonal contrast.
There are always exceptions, but as a general rule look for scenes that contain some strong blacks and whites. This can be achieved by the light or by the brightness (or tone) of the objects in the scene as well as the exposure settings that you use. The brightness of the bark of a silver birch tree for example, could inject some contrast (and interest) in to a woodland scene.