Shooting images containing flags is a thankless task; a dozen good compositions may all be rejected because the flag is not in a photogenic pose. Shooting flags by themselves presents other challenges: everyone knows what the subject matter is, and finding a unique way of framing it is important. Macros of just a portion of a flag will produce interesting images with all the needed content, without all the usual real estate. Adding further elements such as motion blur and selective focus can function to abstract the image, while still leaving the colors and forms clearly visible. One such example is shown below, offering a more poetic, less literal flag image, which would be a good seller for stock image use.
C. David Tobie