Being observant of the edges of your compositional frame is vital to the overall success of a design. Photographers, more than painters, have a difficult time with edge distractions because, subconsciously, it’s easy to block out the visual elements around the subject. For this reason, sometimes when previewing images in post-production, you might notice details in your photos that you didn't see when you first snapped the shot. An effective way to avoid this problem is to visually scan the edge of the frame before you decide on a final composition.
In the images below, I liked the overall design, but the right-hand side edge was too much of a distraction. After shooting several more pictures, I found one that was satisfactory. To learn more tips and techniques about composition in art and photography, click here.
Image above demonstrating an edge distraction