Enhance that abstraction
The Power of the Selective Focus Technique
If you’re searching for an easy but effective abstract photography technique, selective focus is the technique for you. A narrow depth of field is achieved by the selection of a large aperture. The camera is then focused on the center of interest of the image. The rest of the objects in the image will fade into a soft blur.
There are two things which can be done to make your images even more notable when utilizing this technique. First, the color of the background should be different from the center of interest. The second point is that the center of interest can be made even stronger by using curves to point toward the center of interest.
The Use of Light and Shadows
Using the interplay of light and shadows can create drama in an image. Now, some photographers tend to think only in terms of light. This is a mistake — for light is nothing without shadows. Shadows are not just a lack of light. Instead, shadows function to make the light come to life. It is the shadows that shape the light, that draw attention to the light, and that integrate with the light to produce striking photographic opportunities. This is especially true with abstract images.
So, what is the shadows’ role in this technique? The primary role of the shadows is to help to define the forms. In other words, the shadows’ role is to help the forms to stand out. Consequently, it should come as no big surprise that the more interesting the objects in an abstract image, the more likely that the image will be successful. The shadows then function to make the more prominent.
~Ron Bigelow from his article Abstract Photography Tips and Techniques